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澳门新葡亰app2、支持的数据库还蛮多的,该Sql

据说Dapper一次封装了七个易用的ORM工具类:SqlDapperUtil,把平日能用到的各样CRUD都进展了简化封装,让平日技师只需关怀职业就能够,因为特轻巧,故直接贴源代码,大家若需使用能够直接复制到项目中,该SqlDapperUtil已分布用于集团项目中。

当今成熟的ORM俯拾便是,这里只介绍Dapper的施用(最起码我在运用它,已经选择到品种中,小同伴们反映还足以卡塔尔国。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Dapper;
using System.Data;
using System.Data.Common;
using System.Reflection;
using System.IO;
using System.Collections.Concurrent;
using System.Data.SqlClient;

namespace Zuowj.Common
{
    /// <summary>
    /// 基于Dapper的数据操作类封装的工具类
    /// Author:左文俊
    /// Date:2017/12/11
    /// </summary>
    public class SqlDapperUtil
    {
        private static string dbConnectionStringConfigPath = null;
        private readonly static ConcurrentDictionary<string, bool> dbConnNamesCacheDic = new ConcurrentDictionary<string, bool>();

        private string dbConnectionName = null;
        private string dbConnectionString = null;
        private string dbProviderName = null;
        private IDbConnection dbConnection = null;
        private bool useDbTransaction = false;
        private IDbTransaction dbTransaction = null;


        #region 私有方法

        private IDbConnection GetDbConnection()
        {
            bool needCreateNew = false;
            if (dbConnection == null || string.IsNullOrWhiteSpace(dbConnection.ConnectionString))
            {
                needCreateNew = true;
            }
            else if (!MemoryCacheUtil.Contains(dbConnectionName))
            {
                needCreateNew = true;
            }

            if (needCreateNew)
            {
                dbConnectionString = GetDbConnectionString(dbConnectionName, out dbProviderName);
                var dbProviderFactory = DbProviderFactories.GetFactory(dbProviderName);
                dbConnection = dbProviderFactory.CreateConnection();
                dbConnection.ConnectionString = dbConnectionString;
            }

            if (dbConnection.State == ConnectionState.Closed)
            {
                dbConnection.Open();
            }

            return dbConnection;
        }

        private string GetDbConnectionString(string dbConnName, out string dbProviderName)
        {
            //如果指定的连接字符串配置文件路径,则创建缓存依赖,一旦配置文件更改就失效,再重新读取
            string[] connInfos = MemoryCacheUtil.GetOrAddCacheItem(dbConnName, () =>
            {
                var connStrSettings = ConfigUtil.GetConnectionStringForConfigPath(dbConnName, SqlDapperUtil.DbConnectionStringConfigPath);
                string dbProdName = connStrSettings.ProviderName;
                string dbConnStr = connStrSettings.ConnectionString;
                //LogUtil.Info(string.Format("SqlDapperUtil.GetDbConnectionString>读取连接字符串配置节点[{0}]:{1},ProviderName:{2}", dbConnName, dbConnStr, dbProdName), "SqlDapperUtil.GetDbConnectionString");
                return new[] { EncryptUtil.Decrypt(dbConnStr), dbProdName };
            }, SqlDapperUtil.DbConnectionStringConfigPath);

            dbProviderName = connInfos[1];
            return connInfos[0];
        }


        private T UseDbConnection<T>(Func<IDbConnection, T> queryOrExecSqlFunc)
        {
            IDbConnection dbConn = null;

            try
            {
                Type modelType = typeof(T);
                var typeMap = Dapper.SqlMapper.GetTypeMap(modelType);
                if (typeMap == null || !(typeMap is ColumnAttributeTypeMapper<T>))
                {
                    Dapper.SqlMapper.SetTypeMap(modelType, new ColumnAttributeTypeMapper<T>());
                }

                dbConn = GetDbConnection();
                if (useDbTransaction && dbTransaction == null)
                {
                    dbTransaction = GetDbTransaction();
                }

                return queryOrExecSqlFunc(dbConn);
            }
            catch
            {
                throw;
            }
            finally
            {
                if (dbTransaction == null && dbConn != null)
                {
                    CloseDbConnection(dbConn);
                }
            }
        }

        private void CloseDbConnection(IDbConnection dbConn, bool disposed = false)
        {
            if (dbConn != null)
            {
                if (disposed && dbTransaction != null)
                {
                    dbTransaction.Rollback();
                    dbTransaction.Dispose();
                    dbTransaction = null;
                }

                if (dbConn.State != ConnectionState.Closed)
                {
                    dbConn.Close();
                }
                dbConn.Dispose();
                dbConn = null;
            }
        }

        /// <summary>
        /// 获取一个事务对象(如果需要确保多条执行语句的一致性,必需使用事务)
        /// </summary>
        /// <param name="il"></param>
        /// <returns></returns>
        private IDbTransaction GetDbTransaction(IsolationLevel il = IsolationLevel.Unspecified)
        {
            return GetDbConnection().BeginTransaction(il);
        }

        private DynamicParameters ToDynamicParameters(Dictionary<string, object> paramDic)
        {
            return new DynamicParameters(paramDic);
        }

        #endregion

        public static string DbConnectionStringConfigPath
        {
            get
            {
                if (string.IsNullOrEmpty(dbConnectionStringConfigPath))//如果没有指定配置文件,则取默认的配置文件路径作为缓存依赖路径
                {
                    dbConnectionStringConfigPath = BaseUtil.GetConfigPath();
                }

                return dbConnectionStringConfigPath;
            }
            set
            {
                if (!string.IsNullOrWhiteSpace(value) && !File.Exists(value))
                {
                    throw new FileNotFoundException("指定的DB连接字符串配置文件不存在:" + value);
                }

                //如果配置文件改变,则可能导致连接字符串改变,故必需清除所有连接字符串的缓存以便后续重新加载字符串
                if (!string.Equals(dbConnectionStringConfigPath, value, StringComparison.OrdinalIgnoreCase))
                {
                    foreach (var item in dbConnNamesCacheDic)
                    {
                        MemoryCacheUtil.RemoveCacheItem(item.Key);
                    }
                }

                dbConnectionStringConfigPath = value;
            }
        }

        public SqlDapperUtil(string connName)
        {
            dbConnectionName = connName;
            if (!dbConnNamesCacheDic.ContainsKey(connName)) //如果静态缓存中没有,则加入到静态缓存中
            {
                dbConnNamesCacheDic[connName] = true;
            }

        }


        /// <summary>
        /// 使用事务
        /// </summary>
        public void UseDbTransaction()
        {
            useDbTransaction = true;
        }


        /// <summary>
        /// 获取一个值,param可以是SQL参数也可以是匿名对象
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="sql"></param>
        /// <param name="param"></param>
        /// <param name="transaction"></param>
        /// <param name="commandTimeout"></param>
        /// <param name="commandType"></param>
        /// <returns></returns>
        public T GetValue<T>(string sql, object param = null, int? commandTimeout = null, CommandType? commandType = null)
        {
            return UseDbConnection((dbConn) =>
             {
                 return dbConn.ExecuteScalar<T>(sql, param, dbTransaction, commandTimeout, commandType);
             });
        }

        /// <summary>
        /// 获取第一行的所有值,param可以是SQL参数也可以是匿名对象
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="param"></param>
        /// <param name="transaction"></param>
        /// <param name="commandTimeout"></param>
        /// <param name="commandType"></param>
        /// <returns></returns>
        public Dictionary<string, dynamic> GetFirstValues(string sql, object param = null, int? commandTimeout = null, CommandType? commandType = null)
        {
            return UseDbConnection((dbConn) =>
            {
                Dictionary<string, dynamic> firstValues = new Dictionary<string, dynamic>();
                List<string> indexColNameMappings = new List<string>();
                int rowIndex = 0;
                using (var reader = dbConn.ExecuteReader(sql, param, dbTransaction, commandTimeout, commandType))
                {
                    while (reader.Read())
                    {
                        if ((++rowIndex) > 1) break;
                        if (indexColNameMappings.Count == 0)
                        {
                            for (int i = 0; i < reader.FieldCount; i++)
                            {
                                indexColNameMappings.Add(reader.GetName(i));
                            }
                        }

                        for (int i = 0; i < reader.FieldCount; i++)
                        {
                            firstValues[indexColNameMappings[i]] = reader.GetValue(i);
                        }
                    }
                    reader.Close();
                }

                return firstValues;

            });
        }

        /// <summary>
        /// 获取一个数据模型实体类,param可以是SQL参数也可以是匿名对象
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="sql"></param>
        /// <param name="param"></param>
        /// <param name="transaction"></param>
        /// <param name="commandTimeout"></param>
        /// <param name="commandType"></param>
        /// <returns></returns>
        public T GetModel<T>(string sql, object param = null, int? commandTimeout = null, CommandType? commandType = null) where T : class
        {
            return UseDbConnection((dbConn) =>
            {
                return dbConn.QueryFirstOrDefault<T>(sql, param, dbTransaction, commandTimeout, commandType);
            });
        }

        /// <summary>
        /// 获取符合条件的所有数据模型实体类列表,param可以是SQL参数也可以是匿名对象
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="sql"></param>
        /// <param name="param"></param>
        /// <param name="transaction"></param>
        /// <param name="buffered"></param>
        /// <param name="commandTimeout"></param>
        /// <param name="commandType"></param>
        /// <returns></returns>
        public List<T> GetModelList<T>(string sql, object param = null, bool buffered = true, int? commandTimeout = null, CommandType? commandType = null) where T : class
        {
            return UseDbConnection((dbConn) =>
            {
                return dbConn.Query<T>(sql, param, dbTransaction, buffered, commandTimeout, commandType).ToList();
            });
        }

        /// <summary>
        /// 获取符合条件的所有数据并根据动态构建Model类委托来创建合适的返回结果(适用于临时性结果且无对应的模型实体类的情况)
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="buildModelFunc"></param>
        /// <param name="sql"></param>
        /// <param name="param"></param>
        /// <param name="buffered"></param>
        /// <param name="commandTimeout"></param>
        /// <param name="commandType"></param>
        /// <returns></returns>
        public T GetDynamicModel<T>(Func<IEnumerable<dynamic>, T> buildModelFunc, string sql, object param = null, bool buffered = true, int? commandTimeout = null, CommandType? commandType = null)
        {
            var dynamicResult = UseDbConnection((dbConn) =>
           {
               return dbConn.Query(sql, param, dbTransaction, buffered, commandTimeout, commandType);
           });

            return buildModelFunc(dynamicResult);
        }

        /// <summary>
        /// 获取符合条件的所有指定返回结果对象的列表(复合对象【如:1对多,1对1】),param可以是SQL参数也可以是匿名对象
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="sql"></param>
        /// <param name="types"></param>
        /// <param name="map"></param>
        /// <param name="param"></param>
        /// <param name="transaction"></param>
        /// <param name="buffered"></param>
        /// <param name="splitOn"></param>
        /// <param name="commandTimeout"></param>
        /// <param name="commandType"></param>
        /// <returns></returns>

        public List<T> GetMultModelList<T>(string sql, Type[] types, Func<object[], T> map, object param = null, bool buffered = true, string splitOn = "Id", int? commandTimeout = null, CommandType? commandType = null)
        {
            return UseDbConnection((dbConn) =>
            {
                return dbConn.Query<T>(sql, types, map, param, dbTransaction, buffered, splitOn, commandTimeout, commandType).ToList();
            });
        }




        /// <summary>
        /// 执行SQL命令(CRUD),param可以是SQL参数也可以是要添加的实体类
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="param"></param>
        /// <param name="transaction"></param>
        /// <param name="commandTimeout"></param>
        /// <param name="commandType"></param>
        /// <returns></returns>
        public bool ExecuteCommand(string sql, object param = null, int? commandTimeout = null, CommandType? commandType = null)
        {
            return UseDbConnection((dbConn) =>
            {
                int result = dbConn.Execute(sql, param, dbTransaction, commandTimeout, commandType);
                return (result > 0);
            });
        }

        /// <summary>
        /// 批量转移数据(利用SqlBulkCopy实现快速大批量插入到指定的目的表及SqlDataAdapter的批量删除)
        /// </summary>
        public bool BatchMoveData(string srcSelectSql, string srcTableName, List<SqlParameter> srcPrimarykeyParams, string destConnName, string destTableName)
        {

            using (SqlDataAdapter srcSqlDataAdapter = new SqlDataAdapter(srcSelectSql, GetDbConnectionString(dbConnectionName, out dbProviderName)))
            {
                DataTable srcTable = new DataTable();
                SqlCommand deleteCommand = null;
                try
                {
                    srcSqlDataAdapter.AcceptChangesDuringFill = true;
                    srcSqlDataAdapter.AcceptChangesDuringUpdate = false;
                    srcSqlDataAdapter.Fill(srcTable);

                    if (srcTable == null || srcTable.Rows.Count <= 0) return true;

                    string notExistsDestSqlWhere = null;
                    string deleteSrcSqlWhere = null;

                    for (int i = 0; i < srcPrimarykeyParams.Count; i++)
                    {
                        string keyColName = srcPrimarykeyParams[i].ParameterName.Replace("@", "");
                        notExistsDestSqlWhere += string.Format(" AND told.{0}=tnew.{0}", keyColName);
                        deleteSrcSqlWhere += string.Format(" AND {0}=@{0}", keyColName);
                    }

                    string dbProviderName2 = null;
                    using (var destConn = new SqlConnection(GetDbConnectionString(destConnName, out dbProviderName2)))
                    {
                        destConn.Open();

                        string tempDestTableName = "#temp_" + destTableName;
                        destConn.Execute(string.Format("select top 0 * into {0} from {1}", tempDestTableName, destTableName));
                        string destInsertCols = null;
                        using (var destSqlBulkCopy = new SqlBulkCopy(destConn))
                        {
                            try
                            {
                                destSqlBulkCopy.BulkCopyTimeout = 120;
                                destSqlBulkCopy.DestinationTableName = tempDestTableName;
                                foreach (DataColumn col in srcTable.Columns)
                                {
                                    destSqlBulkCopy.ColumnMappings.Add(col.ColumnName, col.ColumnName);
                                    destInsertCols += "," + col.ColumnName;
                                }

                                destSqlBulkCopy.BatchSize = 1000;
                                destSqlBulkCopy.WriteToServer(srcTable);
                            }
                            catch (Exception ex)
                            {
                                //LogUtil.Error("SqlDapperUtil.BatchMoveData.SqlBulkCopy:" + ex.ToString(), "SqlDapperUtil.BatchMoveData");
                            }

                            destInsertCols = destInsertCols.Substring(1);

                            destConn.Execute(string.Format("insert into {1}({0}) select {0} from {2} tnew where not exists(select 1 from {1} told where {3})",
                                             destInsertCols, destTableName, tempDestTableName, notExistsDestSqlWhere.Trim().Substring(3)), null, null, 100);
                        }
                        destConn.Close();
                    }

                    deleteCommand = new SqlCommand(string.Format("DELETE FROM {0} WHERE {1}", srcTableName, deleteSrcSqlWhere.Trim().Substring(3)), srcSqlDataAdapter.SelectCommand.Connection);
                    deleteCommand.Parameters.AddRange(srcPrimarykeyParams.ToArray());
                    deleteCommand.UpdatedRowSource = UpdateRowSource.None;
                    deleteCommand.CommandTimeout = 200;

                    srcSqlDataAdapter.DeleteCommand = deleteCommand;
                    foreach (DataRow row in srcTable.Rows)
                    {
                        row.Delete();
                    }

                    srcSqlDataAdapter.UpdateBatchSize = 1000;
                    srcSqlDataAdapter.Update(srcTable);
                    srcTable.AcceptChanges();

                    return true;
                }
                catch (Exception ex)
                {
                    //LogUtil.Error("SqlDapperUtil.BatchMoveData:" + ex.ToString(), "SqlDapperUtil.BatchMoveData");
                    return false;
                }
                finally
                {
                    if (deleteCommand != null)
                    {
                        deleteCommand.Parameters.Clear();
                    }
                }
            }

        }

        /// <summary>
        /// 批量复制数据(把源DB中根据SQL语句查出的结果批量COPY插入到目的DB的目的表中)
        /// </summary>
        public TResult BatchCopyData<TResult>(string srcSelectSql, string destConnName, string destTableName, IDictionary<string, string> colMappings, Func<IDbConnection, TResult> afterCoppyFunc)
        {

            using (SqlDataAdapter srcSqlDataAdapter = new SqlDataAdapter(srcSelectSql, GetDbConnectionString(dbConnectionName, out dbProviderName)))
            {
                DataTable srcTable = new DataTable();
                TResult copyResult = default(TResult);
                try
                {
                    srcSqlDataAdapter.AcceptChangesDuringFill = true;
                    srcSqlDataAdapter.AcceptChangesDuringUpdate = false;
                    srcSqlDataAdapter.Fill(srcTable);

                    if (srcTable == null || srcTable.Rows.Count <= 0) return copyResult;


                    string dbProviderName2 = null;
                    using (var destConn = new SqlConnection(GetDbConnectionString(destConnName, out dbProviderName2)))
                    {
                        destConn.Open();
                        string tempDestTableName = "#temp_" + destTableName;
                        destConn.Execute(string.Format("select top 0 * into {0} from {1}", tempDestTableName, destTableName));
                        bool bcpResult = false;
                        using (var destSqlBulkCopy = new SqlBulkCopy(destConn))
                        {
                            try
                            {
                                destSqlBulkCopy.BulkCopyTimeout = 120;
                                destSqlBulkCopy.DestinationTableName = tempDestTableName;
                                foreach (var col in colMappings)
                                {
                                    destSqlBulkCopy.ColumnMappings.Add(col.Key, col.Value);
                                }

                                destSqlBulkCopy.BatchSize = 1000;
                                destSqlBulkCopy.WriteToServer(srcTable);
                                bcpResult = true;
                            }
                            catch (Exception ex)
                            {
                                //LogUtil.Error("SqlDapperUtil.BatchMoveData.SqlBulkCopy:" + ex.ToString(), "SqlDapperUtil.BatchMoveData");
                            }
                        }

                        if (bcpResult)
                        {
                            copyResult = afterCoppyFunc(destConn);
                        }

                        destConn.Close();
                    }

                    return copyResult;
                }
                catch (Exception ex)
                {
                    //LogUtil.Error("SqlDapperUtil.BatchCopyData:" + ex.ToString(), "SqlDapperUtil.BatchCopyData");
                    return copyResult;
                }
            }

        }


        /// <summary>
        /// 当使用了事务,则最后需要调用该方法以提交所有操作
        /// </summary>
        /// <param name="dbTransaction"></param>
        public void Commit()
        {
            try
            {
                if (dbTransaction.Connection != null && dbTransaction.Connection.State != ConnectionState.Closed)
                {
                    dbTransaction.Commit();
                }
            }
            catch
            {
                throw;
            }
            finally
            {
                if (dbTransaction.Connection != null)
                {
                    CloseDbConnection(dbTransaction.Connection);
                }
                dbTransaction.Dispose();
                dbTransaction = null;
                useDbTransaction = false;

                if (dbConnection != null)
                {
                    CloseDbConnection(dbConnection);
                }
            }
        }

        /// <summary>
        /// 当使用了事务,如果报错或需要中断执行,则需要调用该方法执行回滚操作
        /// </summary>
        /// <param name="dbTransaction"></param>
        public void Rollback()
        {
            try
            {
                if (dbTransaction.Connection != null && dbTransaction.Connection.State != ConnectionState.Closed)
                {
                    dbTransaction.Rollback();
                }
            }
            catch
            {
                throw;
            }
            finally
            {
                if (dbTransaction.Connection != null)
                {
                    CloseDbConnection(dbTransaction.Connection);
                }

                dbTransaction.Dispose();
                dbTransaction = null;
                useDbTransaction = false;
            }
        }

        ~SqlDapperUtil()
        {
            try
            {
                CloseDbConnection(dbConnection, true);
            }
            catch
            { }
        }

    }
}

优点:

ColumnAttributeTypeMapper扶植类相关代码如下:(假设不思谋实体类的性质与表字段不等同的事态,如下映射类能够没有须求足够,同期SqlDapperUtil中移除相关信任ColumnAttributeTypeMapper逻辑就能够)

1、开源、轻量、小巧、上手轻巧。

using Dapper;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;

namespace KYExpress.Common
{
    public class ColumnAttributeTypeMapper<T> : FallbackTypeMapper
    {
        public ColumnAttributeTypeMapper()
            : base(new SqlMapper.ITypeMap[]
                {
                    new CustomPropertyTypeMap(
                       typeof(T),
                       (type, columnName) =>
                           type.GetProperties().FirstOrDefault(prop =>
                               prop.GetCustomAttributes(false)
                                   .OfType<ColumnAttribute>()
                                   .Any(attr => attr.Name == columnName)
                               )
                       ),
                    new DefaultTypeMap(typeof(T))
                })
        {
        }
    }

    [AttributeUsage(AttributeTargets.Property, AllowMultiple = true)]
    public class ColumnAttribute : Attribute
    {
        public string Name { get; set; }
    }

    public class FallbackTypeMapper : SqlMapper.ITypeMap
    {
        private readonly IEnumerable<SqlMapper.ITypeMap> _mappers;

        public FallbackTypeMapper(IEnumerable<SqlMapper.ITypeMap> mappers)
        {
            _mappers = mappers;
        }


        public ConstructorInfo FindConstructor(string[] names, Type[] types)
        {
            foreach (var mapper in _mappers)
            {
                try
                {
                    ConstructorInfo result = mapper.FindConstructor(names, types);
                    if (result != null)
                    {
                        return result;
                    }
                }
                catch (NotImplementedException)
                {
                }
            }
            return null;
        }

        public SqlMapper.IMemberMap GetConstructorParameter(ConstructorInfo constructor, string columnName)
        {
            foreach (var mapper in _mappers)
            {
                try
                {
                    var result = mapper.GetConstructorParameter(constructor, columnName);
                    if (result != null)
                    {
                        return result;
                    }
                }
                catch (NotImplementedException)
                {
                }
            }
            return null;
        }

        public SqlMapper.IMemberMap GetMember(string columnName)
        {
            foreach (var mapper in _mappers)
            {
                try
                {
                    var result = mapper.GetMember(columnName);
                    if (result != null)
                    {
                        return result;
                    }
                }
                catch (NotImplementedException)
                {
                }
            }
            return null;
        }


        public ConstructorInfo FindExplicitConstructor()
        {
            return _mappers
                .Select(mapper => mapper.FindExplicitConstructor())
                .FirstOrDefault(result => result != null);
        }
    }

}

2、帮忙的数据库还蛮多的, Mysql,SqlLite,Sqlserver,Oracle等风流浪漫层层的数据库。

应用示例方法如下:

3、Dapper原理通过Emit反射IDataReader的队列队列来急速的获得和爆发对象。品质平时很牛逼的标准

 1.先来效仿各个查询数据(由于是向来写模拟SQL输出,故并未有标准,也可以有利我们COPY后直接能够测量检验结果卡塔 尔(阿拉伯语:قطر‎

缺点:

            //实例化SqlDapperUtil对象,构造函数是config文件中的connectionStrings的Name名
            var dapper = new SqlDapperUtil("LmsConnectionString");

            //查询1个值
            DateTime nowTime = dapper.GetValue<DateTime>("select getdate() as nowtime");


            //查询1行值,并转换成字典(这对于临时查询多个字段而无需定义实体类有用)
            Dictionary<string, dynamic> rowValues = dapper.GetFirstValues("select 0 as col0,1 as col1,2 as col2");


            //查询1行并返回实体类
            Person person = dapper.GetModel<Person>("select '张三' as Name,22 as Age,'2018-1-1' as BirthDay,'中国广东深圳' as HomeAddr");


            //查询1行表字段与实体类属性不一致映射
            Person person2 = dapper.GetModel<Person>("select '张三' as Name,22 as Age,'2018-1-1' as BirthDay,'中国广东深圳' as HomeAddress");


            //查询多行返回实体集合
            var persons = dapper.GetModelList<Person>(@"select '张三' as Name,22 as Age,'2018-1-1' as BirthDay,'中国广东深圳' as HomeAddr union all
                                                                            select '李四' as Name,25 as Age,'2018-10-1' as BirthDay,'中国广东深圳' as HomeAddress union all
                                                                            select '王五' as Name,35 as Age,'1982-10-1' as BirthDay,'中国广东广州' as HomeAddress
                                                                        ");


            //查询多行返回1对1关联实体结果集
            var personWithCarResult = dapper.GetMultModelList<Person>(@"select t1.*,t2.* from
                                                                                                    (select '张三' as Name,22 as Age,'2018-1-1' as BirthDay,'中国广东深圳' as HomeAddr union all
                                                                                                    select '李四' as Name,25 as Age,'2018-10-1' as BirthDay,'中国广东深圳' as HomeAddress union all
                                                                                                    select '王五' as Name,35 as Age,'1982-10-1' as BirthDay,'中国广东广州' as HomeAddress)as t1 inner join
                                                                                                    (
                                                                                                    select '张三' as DriverName,'大众' as Brand,'2018-8-8' as ManufactureDate union all
                                                                                                    select '李四' as DriverName,'奔驰' as Brand,'2018-1-8' as ManufactureDate union all
                                                                                                    select '王五' as DriverName,'奥迪' as Brand,'2017-8-8' as ManufactureDate
                                                                                                    )as t2
                                                                                                    on t1.Name=t2.DriverName
                                                                        ", new[] { typeof(Person), typeof(CarInfo) }, (objs) =>
                                                                         {
                                                                             Person personItem = objs[0] as Person;
                                                                             CarInfo carItem = objs[1] as CarInfo;
                                                                             personItem.Car = carItem;
                                                                             return personItem;
                                                                         }, splitOn: "DriverName");




            //查询多行返回1对多关联实体结果=personWithManyCars
            List<Person> personWithManyCars = new List<Person>();
            dapper.GetMultModelList<Person>(@"select t1.*,t2.* from
                                                                                                    (select '张三' as Name,22 as Age,'2018-1-1' as BirthDay,'中国广东深圳' as HomeAddr union all
                                                                                                    select '李四' as Name,25 as Age,'2018-10-1' as BirthDay,'中国广东深圳' as HomeAddress union all
                                                                                                    select '王五' as Name,35 as Age,'1982-10-1' as BirthDay,'中国广东广州' as HomeAddress)as t1 inner join
                                                                                                    (
                                                                                                    select '张三' as DriverName,'大众' as Brand,'2018-8-8' as ManufactureDate union all
                                                                                                    select '张三' as DriverName,'奔驰' as Brand,'2018-1-8' as ManufactureDate union all
                                                                                                    select '张三' as DriverName,'奥迪' as Brand,'2017-8-8' as ManufactureDate
                                                                                                    )as t2
                                                                                                    on t1.Name=t2.DriverName
                                                                        ", new[] { typeof(Person), typeof(CarInfo) }, (objs) =>
                                                                        {
                                                                            Person personItem = objs[0] as Person;
                                                                            CarInfo carItem = objs[1] as CarInfo;

                                                                            Person personItemMain = personWithManyCars.FirstOrDefault(p => p.Name == personItem.Name);
                                                                            if (personItemMain == null)
                                                                            {
                                                                                personItem.Cars = new List<CarInfo>();
                                                                                personItemMain = personItem;
                                                                                personWithManyCars.Add(personItemMain);
                                                                            }

                                                                            personItemMain.Cars.Add(carItem);
                                                                            return personItemMain;

                                                                        }, splitOn: "DriverName");

作为风流罗曼蒂克款ORM太过分轻量级了,依照目的自动生成sql的功用依旧空白,要求本人来扩充,

2.上面是自己要作为模范服从规则怎么着举办增、删、改以至动态查询的气象:

本来那也是亮点, 好声音的教员们常常说某个人正是张白纸……

            //使用事务创建多张表,多条SQL语句写在一起
            try
            {
                dapper.UseDbTransaction();
                dapper.ExecuteCommand(@"create table T_Person(Name nvarchar(20) primary key,Age int,BirthDay datetime,HomeAddress nvarchar(200));
                                                    create table T_CarInfo(DriverName nvarchar(20) primary key,Brand nvarchar(50),ManufactureDate datetime)");
                dapper.Commit();
            }
            catch (Exception ex)
            {
                dapper.Rollback();
                //记日志
            }

            //使用事务批量插入多张表的多个记录,多条SQL分多次执行(参数支持批量集合对象传入,无需循环)
            try
            {
                dapper.UseDbTransaction();
                dapper.ExecuteCommand(@"insert into T_Person
select N'张三' as Name,22 as Age,'2018-1-1' as BirthDay,N'中国广东深圳' as HomeAddress union all
select N'李四' as Name,25 as Age,'2018-10-1' as BirthDay,N'中国广东深圳' as HomeAddress union all
select N'王五' as Name,35 as Age,'1982-10-1' as BirthDay,N'中国广东广州' as HomeAddress");


                var carInfos = dapper.GetModelList<CarInfo>(@"
select N'张三' as DriverName,N'大众' as Brand,'2018-8-8' as ManufactureDate union all
select N'李四' as DriverName,N'奔驰' as Brand,'2018-1-8' as ManufactureDate union all
select N'王五' as DriverName,N'奥迪' as Brand,'2017-8-8' as ManufactureDate");

                dapper.ExecuteCommand(@"insert into T_CarInfo(DriverName,Brand,ManufactureDate) Values(@DriverName,@Brand,@ManufactureDate)", carInfos);

                dapper.Commit();
            }
            catch (Exception ex)
            {
                dapper.Rollback();
                //记日志
            }

            //执行删除,有参数,参数可以是实体类、匿名对象、字典(如有需要,可以是集合,以支持批量操作)
            bool deleteResult = dapper.ExecuteCommand("delete from T_CarInfo where DriverName=@DriverName", new { DriverName = "李四" });

            //构建动态执行SQL语句(以下是更新,查询类似)
            StringBuilder updateSqlBuilder = new StringBuilder();
            var updateParams = new Dictionary<string, object>();

            if (1 == 1)
            {
                updateSqlBuilder.Append(",Age=@Age");
                updateParams["Age"] = 20;
            }

            if (2 == 2)
            {
                updateSqlBuilder.Append(",BirthDay=@BirthDay");
                updateParams["BirthDay"] = Convert.ToDateTime("2010-1-1");
            }

            if (3 == 3)
            {
                updateSqlBuilder.Append(",HomeAddress=@HomeAddress");
                updateParams["HomeAddress"] = "中国北京天安门";
            }

            string updateSql = string.Concat("update T_Person set ", updateSqlBuilder.ToString().TrimStart(','), "  where  Name=@Name");
            updateParams["Name"] = "张三";

            bool updateResult = dapper.ExecuteCommand(updateSql, updateParams);

            //查询返回动态自定义结果,之所以不直接返回Dynamic就好,是因为可读性差,故尽可能的在执行后就转成指定的类型
            Tuple<string, int> hasCarInfo = dapper.GetDynamicModel<Tuple<string, int>>((rs) =>
            {
                var result = rs.First();
                return Tuple.Create<string, int>(result.Name, result.CarCount);
            }, @"select a.Name,count(b.DriverName) as CarCount from T_Person a left join T_CarInfo b on a.Name=b.DriverName where a.Name=@Name group by a.Name", new { Name = "张三" });

因此针对Dapper已经有比很多成熟的恢弘项目了,Dapper.Rainbow、Dapper.Contrib,DapperExtensions。

3.还会有多个措施:BatchCopyData、BatchMoveData,那是特别封装的,不是依靠Dapper而是基于原生的Ado.net及BCP,目标是异常快大批量跨DB跨表COPY数据或改动数据,使用也不复杂,建议想询问的网民能够查看本人过去的稿子

我们这边介绍的是DapperExtensions

如上示例方法用到了几个类,如下:

dapper-dot-net源码: (更新频率快,项目包含了各样除了Dapper-Extensions的恢弘类型卡塔 尔(阿拉伯语:قطر‎

        class Person
        {
            public string Name { get; set; }


            public int Age { get; set; }

            public DateTime BirthDay { get; set; }

            [Column(Name = "HomeAddress")]
            public string HomeAddr { get; set; }

            public CarInfo Car { get; set; }

            public List<CarInfo> Cars { get; set; }
        }

        class CarInfo
        {
            public string Brand { get; set; }

            public DateTime ManufactureDate { get; set; }

            public string DriverName { get; set; }
        }

Dapper-Extensions源码:

SqlDapperUtil类中依据了前头本身封装的类:如:MemoryCacheUtil(本地内部存储器信赖缓存实用工具类)、ConfigUtil(配置文件管理工科具类卡塔 尔(英语:State of Qatar)、EncryptUtil(加密工具类卡塔 尔(阿拉伯语:قطر‎,假使项目中不想引用那几个类,能够移除或改成任何形式就可以。

Dapper-Extensions的优点

 其它说惠氏下,为了防止万豆蔻年华和减削因DB连接未立刻放出招致的连接池不足等原因,故暗中同意试行全部的CRUD方法都以用完即自由,但有生龙活虎种景况不会放出正是行使了作业,若接收职业,则少不了配套使用:UseDbTransaction、Commit、或失利实践Rollback,不然大概产生未能及时放出对象,当然最终当SqlDapperUtil实例被回笼后事务若未有交给或回滚,会强制试行回滚操作并释放工作及连接对象,防止只怕的能源浪费景况。

1、开源

本来已经想计算一下那篇小说,但平素由于职业太忙没临时间,前几日应用加班商量.NET CORE的空辰时间成功,请大家扶植,有好东西自身料定会分享的,就算不必然高大上,但不可否认实用且项目中有实战过的。

2、针对Dapper封装了常用的CRUD方法,有独立的查询语法。

3、供给映射的实业类本人0配置,不要求加性格什么的。是透过独立的映射类来管理,可以设置类映射到DB的外号,字段的小名等等。

Dapper-Extensions的缺点:

1、好几年没更新了

2、不帮衬oracle(木有oracle的方言,已经化解卡塔尔

3、无法同期支持三种数据库

4、部分代码有个别bug

下面先简单介绍一下Dapper的基本语法。

Dapper就三个.cs文件,能够放置项目代码中央直属机关接编写翻译,也得以直接引用DLL文件。

Dapper对DB的操作信任于Connection,为了扶助多库,我们用IDbConnection conn

using (IDbConnection conn = GetConnection    {        const string query = "select * from XO order by id desc";        return conn.Query<XOEntity>(query,null);    }

下边是带参数的语法

int xoID=666; //变量主键
 using (IDbConnection conn = GetConnection    {        const string query = "select * from XO where Id=@MyID";        return conn.Query<XOEntity>(query, new { MyID = xoID});                            }

各个办法都重载了作业的操作,平常的数据库操作都扶助。可是每便推行都急需传递sql,并且每回都要接受Using,望着不爽啊, 那……

好吧上边简单介绍下利用Dapper-Extensions的主干语法(在Dapper-Extensions 的底工上用了Repository形式,代码效果如下卡塔 尔(阿拉伯语:قطر‎。

            //实体类            DemoEntity entity = new DemoEntity();            //根据实体主键删除            this.Delete<DemoEntity>;            //根据主键ID删除            this.Delete<DemoEntity>(1);            //增加            this.Insert<DemoEntity>;            //更新            bool result = this.Update<DemoEntity>;            //根据主键返回实体            entity = this.GetById<DemoEntity>(1);            //返回 行数            this.Count<DemoEntity>(new { ID = 1 });            //查询所有            IEnumerable<DemoEntity> list = this.GetAll<DemoEntity>();            IList<ISort> sort = new List<ISort>();            sort.Add(new Sort { PropertyName = "ID", Ascending = false });            //条件查询            list = this.GetList<DemoEntity>(new { ID = 1, Name = "123" }, sort);            //orm 拼接条件 查询            IList<IPredicate> predList = new List<IPredicate>();            predList.Add(Predicates.Field<DemoEntity>(p => p.Name, Operator.Like, "不知道%"));            predList.Add(Predicates.Field<DemoEntity>(p => p.ID, Operator.Eq, 1));            IPredicateGroup predGroup = Predicates.Group(GroupOperator.And, predList.ToArray;                        list = this.GetList<DemoEntity>(predGroup);            //分页查询            long allRowsCount = 0;            this.GetPageList<DemoEntity>(1, 10, out allRowsCount, new { ID = 1 }, sort);

在说ORM早先,依然要说一下HY.DataAccess这些模块

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其一模块是对数码访问提供的叁个Helper的法力,里面满含了 各个DB的SqlHelper,分页。

DBHelper 都三番五回自IDBHelper.cs

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using System.Data.Common;using System.Data;namespace HY.DataAccess{    /// <summary>    /// 提供对数据库的基本操作,连接字符串需要在数据库配置。    /// </summary>    public interface IDBHelper    {        /// <summary>        /// 生成分页SQL语句        /// </summary>        /// <param name="pageIndex"></param>        /// <param name="pageSize"></param>        /// <param name="selectSql"></param>        /// <param name="sqlCount"></param>        /// <param name="orderBy"></param>        /// <returns></returns>        string GetPagingSql(int pageIndex, int pageSize, string selectSql, string sqlCount, string orderBy);        /// <summary>        /// 开始一个事务        /// </summary>        /// <returns></returns>        DbTransaction BeginTractionand();        /// <summary>        /// 开始一个事务        /// </summary>        /// <param name="connKey">数据库连接字符key</param>        DbTransaction BeginTractionand(string connKey);        /// <summary>        /// 回滚事务        /// </summary>        /// <param name="dbTransaction">要回滚的事务</param>        void RollbackTractionand(DbTransaction dbTransaction);        /// <summary>        /// 结束并确认事务        /// </summary>        /// <param name="dbTransaction">要结束的事务</param>        void CommitTractionand(DbTransaction dbTransaction);        #region DataSet        /// <summary>        /// 执行sql语句,ExecuteDataSet 返回DataSet        /// </summary>        /// <param name="commandText">sql语句</param>        /// <param name="commandType"></param>        DataSet ExecuteDataSet(string commandText, CommandType commandType);        /// <summary>        /// 执行sql语句,ExecuteDataSet 返回DataSet        /// </summary>        /// <param name="connKey">数据库连接字符key</param>        /// <param name="commandText">sql语句</param>        /// <param name="commandType"></param>        DataSet ExecuteDataSet(string connKey, string commandText, CommandType commandType);        /// <summary>        /// 执行sql语句,ExecuteDataSet 返回DataSet        /// </summary>        /// <param name="commandText">sql语句</param>        /// <param name="commandType"></param>        /// <param name="parameterValues">参数</param>        DataSet ExecuteDataSet(string commandText, CommandType commandType, params DbParameter[] parameterValues);        /// <summary>        /// 执行sql语句,ExecuteDataSet 返回DataSet        /// </summary>        /// <param name="connKey">数据库连接字符key</param>        /// <param name="commandText">sql语句</param>        /// <param name="commandType"></param>        /// <param name="parameterValues">参数</param>        DataSet ExecuteDataSet(string connKey, string commandText, CommandType commandType, params DbParameter[] parameterValues);        #endregion        #region ExecuteNonQuery        /// <summary>        /// 执行sql语句,返回影响的行数        /// </summary>        /// <param name="commandText">sql语句</param>        /// <param name="commandType"></param>        int ExecuteNonQuery(string commandText, CommandType commandType);        /// <summary>        /// 执行sql语句,返回影响的行数        /// </summary>        /// <param name="connKey">数据库连接字符key</param>        /// <param name="commandText">sql语句</param>        /// <param name="commandType"></param>        int ExecuteNonQuery(string connKey, string commandText, CommandType commandType);        /// <summary>        /// 执行sql语句,返回影响的行数        /// </summary>        /// <param name="trans">事务对象</param>        /// <param name="commandText">sql语句</param>        /// <param name="commandType"></param>        int ExecuteNonQuery(DbTransaction trans, string commandText, CommandType commandType);        /// <summary>        /// 执行sql语句,返回影响的行数        /// </summary>        /// <param name="commandText">sql语句</param>        /// <param name="commandType"></param>        /// <param name="parameterValues">参数</param>        int ExecuteNonQuery(string commandText, CommandType commandType, params DbParameter[] parameterValues);        /// <summary>        /// 执行sql语句,返回影响的行数        /// </summary>        /// <param name="connKey">数据库连接字符key</param>        /// <param name="commandText">sql语句</param>        /// <param name="commandType"></param>        /// <param name="parameterValues">参数</param>        int ExecuteNonQuery(string connKey, string commandText, CommandType commandType, params DbParameter[] parameterValues);        /// <summary>        /// 执行sql语句,返回影响的行数        /// </summary>        /// <param name="trans">事务对象</param>        /// <param name="commandText">sql语句</param>        /// <param name="commandType"></param>        /// <param name="parameterValues">参数</param>        int ExecuteNonQuery(DbTransaction trans, string commandText, CommandType commandType, params DbParameter[] parameterValues);        #endregion        #region IDataReader        /// <summary>        /// 执行sql语句,ExecuteReader 返回IDataReader        /// </summary>           /// <param name="commandText">sql语句</param>        /// <param name="commandType"></param>        IDataReader ExecuteReader(string commandText, CommandType commandType);        /// <summary>        /// 执行sql语句,ExecuteReader 返回IDataReader        /// </summary>         /// <param name="commandText">sql语句</param>        /// <param name="commandType"></param>        /// <param name="parameterValues">参数</param>        IDataReader ExecuteReader(string commandText, CommandType commandType, params DbParameter[] parameterValues);        /// <summary>        /// 执行sql语句,ExecuteReader 返回IDataReader        /// </summary>        /// <param name="connKey">数据库连接字符key</param>                /// <param name="commandText">sql语句</param>        /// <param name="commandType"></param>        IDataReader ExecuteReader(string connKey, string commandText, CommandType commandType);        /// <summary>        /// 执行sql语句,ExecuteReader 返回IDataReader        /// </summary>        /// <param name="connKey">数据库连接字符key</param>                /// <param name="commandText">sql语句</param>        /// <param name="commandType"></param>        /// <param name="parameterValues">参数</param>        IDataReader ExecuteReader(string connKey, string commandText, CommandType commandType, params DbParameter[] parameterValues);        #endregion        #region ExecuteScalar        /// <summary>        /// 执行sql语句,ExecuteScalar 返回第一行第一列的值        /// </summary>        /// <param name="commandText">sql语句</param>        /// <param name="commandType"></param>        object ExecuteScalar(string commandText, CommandType commandType);        /// <summary>        /// 执行sql语句,ExecuteScalar 返回第一行第一列的值        /// </summary>        /// <param name="commandText">sql语句</param>        /// <param name="commandType"></param>        /// <param name="parameterValues">参数</param>        object ExecuteScalar(string commandText, CommandType commandType, params DbParameter[] parameterValues);        /// <summary>        /// 执行sql语句,ExecuteScalar 返回第一行第一列的值        /// </summary>        /// <param name="trans">事务</param>        /// <param name="commandText">sql语句</param>        /// <param name="commandType"></param>        object ExecuteScalar(DbTransaction trans, string commandText, CommandType commandType);        /// <summary>        /// 执行sql语句,ExecuteScalar 返回第一行第一列的值        /// </summary>        /// <param name="connKey">数据库连接字符key</param>        /// <param name="commandText">sql语句</param>        /// <param name="commandType"></param>        object ExecuteScalar(string connKey, string commandText, CommandType commandType);        /// <summary>        /// 执行sql语句,ExecuteScalar 返回第一行第一列的值        /// </summary>        /// <param name="connKey">数据库连接字符key</param>        /// <param name="commandText">sql语句</param>        /// <param name="commandType"></param>        /// <param name="parameterValues">参数</param>        object ExecuteScalar(string connKey, string commandText, CommandType commandType, params DbParameter[] parameterValues);        /// <summary>        /// 执行sql语句,ExecuteScalar 返回第一行第一列的值        /// </summary>        /// <param name="trans">事务</param>        /// <param name="commandText">sql语句</param>        /// <param name="commandType"></param>        /// <param name="parameterValues">参数</param>        /// <returns></returns>        object ExecuteScalar(DbTransaction trans, string commandText, CommandType commandType, params DbParameter[] parameterValues);        #endregion    }}

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IDBSession.cs 对数码访谈对象的定义

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using System;using System.Data;namespace HY.DataAccess{    /// <summary>    /// 数据库接口    /// </summary>    public interface IDatabase    {        IDbConnection Connection { get; }        DatabaseType DatabaseType { get; }        string ConnKey { get; }    }    /// <summary>    /// 数据库类对象    /// </summary>    public class Database : IDatabase    {        public IDbConnection Connection { get; private set; }        public DatabaseType DatabaseType { get; private set; }        public string ConnKey { get; set; }        public Database(IDbConnection connection)        {            Connection = connection;        }        public Database(DatabaseType dbType, string connKey)        {            DatabaseType = dbType;            ConnKey = connKey;            Connection = SqlConnectionFactory.CreateSqlConnection(dbType, connKey);        }    }    /// <summary>    /// 数据连接事务的Session接口    /// </summary>    public interface IDBSession : IDisposable    {        string ConnKey { get; }        DatabaseType DatabaseType { get; }        IDbConnection Connection { get; }        IDbTransaction Transaction { get; }        IDbTransaction Begin(IsolationLevel isolation = IsolationLevel.ReadCommitted);        void Commit();        void Rollback();    }}

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SqlConnectionFactory.cs 这么些类是使用工厂方式创建DB连接的卷入,代码如下:

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using System;using System.Collections.Generic;using System.Configuration;using System.Data;namespace HY.DataAccess{    public enum DatabaseType    {            SqlServer,        MySql,        Oracle,        DB2    }    public class SqlConnectionFactory    {        public static IDbConnection CreateSqlConnection(DatabaseType dbType, string strKey)        {            IDbConnection connection = null;            string strConn = ConfigurationManager.ConnectionStrings[strKey].ConnectionString;            switch             {                case DatabaseType.SqlServer:                    connection = new System.Data.SqlClient.SqlConnection;                    break;                case DatabaseType.MySql:                    //connection = new MySql.Data.MySqlClient.MySqlConnection;                    //break;                case DatabaseType.Oracle:                    //connection = new Oracle.DataAccess.Client.OracleConnection;                    connection = new System.Data.OracleClient.OracleConnection;                    break;                case DatabaseType.DB2:                    connection = new System.Data.OleDb.OleDbConnection;                    break;            }            return connection;        }    }}

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ORM亦非全能的,比方做大数量的批量插入什么的,依旧要求SqlHelper,加上某个人就爱怜DataTable可能DataSet。

于是SqlHelper作为根底,ORM作为协助,万不一失啊。

上面说说ORM那块的达成情势。见下截图

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IDataServiceRepository.cs(提供业务层使用,里面包车型地铁主意不补助传递sql,包括sql的话语最佳仍然放在数据层操作的好卡塔尔国

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using System.Collections.Generic;using System.Data;using DapperExtensions;using HY.DataAccess;namespace HY.ORM{    public interface IDataServiceRepository    {        IDBSession DBSession { get; }        T GetById<T>(dynamic primaryId) where T : class;        IEnumerable<T> GetByIds<T>(IList<dynamic> ids) where T : class;        IEnumerable<T> GetAll<T>() where T : class;        int Count<T>(object predicate, bool buffered = false) where T : class;        //lsit        IEnumerable<T> GetList<T>(object predicate = null, IList<ISort> sort = null, bool buffered = false) where T : class;        IEnumerable<T> GetPageList<T>(int pageIndex, int pageSize, out long allRowsCount, object predicate = null, IList<ISort> sort = null, bool buffered = true) where T : class;        dynamic Insert<T>(T entity, IDbTransaction transaction = null) where T : class;        bool InsertBatch<T>(IEnumerable<T> entityList, IDbTransaction transaction = null) where T : class;        bool Update<T>(T entity, IDbTransaction transaction = null) where T : class;        bool UpdateBatch<T>(IEnumerable<T> entityList, IDbTransaction transaction = null) where T : class;        int Delete<T>(dynamic primaryId, IDbTransaction transaction = null) where T : class;        int DeleteList<T>(object predicate, IDbTransaction transaction = null) where T : class;        bool DeleteBatch<T>(IEnumerable<dynamic> ids, IDbTransaction transaction = null) where T : class;    }}

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IDataRepository.cs(提供数据层使用,世袭了上边的IDataServiceRepository,扶助传入sql卡塔 尔(阿拉伯语:قطر‎

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using System;using System.Collections.Generic;using System.Data;using Dapper;using HY.DataAccess;namespace HY.ORM{    public interface IDataRepository : IDataServiceRepository    {        IDBSession DBSession { get; }                    IEnumerable<T> Get<T>(string sql, dynamic param = null, bool buffered = true) where T : class;        IEnumerable<dynamic> Get(string sql, dynamic param = null, bool buffered = true);        IEnumerable<TReturn> Get<TFirst, TSecond, TReturn>(string sql, Func<TFirst, TSecond, TReturn> map,            dynamic param = null, IDbTransaction transaction = null, bool buffered = true,            string splitOn = "Id", int? commandTimeout = null);         IEnumerable<TReturn> Get<TFirst, TSecond,TThird, TReturn>(string sql, Func<TFirst, TSecond,TThird, TReturn> map,            dynamic param = null, IDbTransaction transaction = null, bool buffered = true,            string splitOn = "Id", int? commandTimeout = null);        SqlMapper.GridReader GetMultiple(string sql, dynamic param = null, IDbTransaction transaction = null,            int? commandTimeout = null, CommandType? commandType = null);         IEnumerable<T> GetPage<T>(int pageIndex, int pageSize, out long allRowsCount, string sql, dynamic param = null, string allRowsCountSql=null,  dynamic allRowsCountParam = null, bool buffered = true) where T : class;              Int32 Execute(string sql, dynamic param = null, IDbTransaction transaction = null);    }}

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RepositoryServiceBase.cs(IDataServiceRepository的兑现类卡塔尔

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using System.Collections.Generic;using System.Data;using System.Linq;using Dapper;using DapperExtensions;using HY.DataAccess;namespace HY.ORM{    public class RepositoryServiceBase : IDataServiceRepository    {        public RepositoryServiceBase()        {        }        public RepositoryServiceBase(IDBSession dbSession)        {            DBSession = dbSession;        }        public IDBSession DBSession { get; private set; }        public void SetDBSession(IDBSession dbSession)        {            DBSession = dbSession;        }        /// <summary>        /// 根据Id获取实体        /// </summary>        /// <typeparam name="T"></typeparam>        /// <param name="primaryId"></param>        /// <returns></returns>        public T GetById<T>(dynamic primaryId) where T : class        {            return DBSession.Connection.Get<T>(primaryId as object, databaseType: DBSession.DatabaseType);        }        /// <summary>        /// 根据多个Id获取多个实体        /// </summary>        /// <typeparam name="T"></typeparam>        /// <param name="ids"></param>        /// <returns></returns>        public IEnumerable<T> GetByIds<T>(IList<dynamic> ids) where T : class        {            var tblName = string.Format("dbo.{0}", typeof;            var idsin = string.Join(",", ids.ToArray<dynamic>;            var sql = "SELECT * FROM @table WHERE Id in ";            IEnumerable<T> dataList = DBSession.Connection.Query<T>(sql, new { table = tblName, ids = idsin });            return dataList;        }        /// <summary>        /// 获取全部数据集合        /// </summary>        /// <typeparam name="T"></typeparam>        /// <returns></returns>        public IEnumerable<T> GetAll<T>() where T : class        {            return DBSession.Connection.GetList<T>(databaseType: DBSession.DatabaseType);        }        /// <summary>        /// 统计记录总数        /// </summary>        /// <typeparam name="T"></typeparam>        /// <param name="predicate"></param>        /// <param name="buffered"></param>        /// <returns></returns>        public int Count<T>(object predicate, bool buffered = false) where T : class        {            return DBSession.Connection.Count<T>(predicate, databaseType: DBSession.DatabaseType);        }        /// <summary>        /// 查询列表数据        /// </summary>        /// <typeparam name="T"></typeparam>        /// <param name="predicate"></param>        /// <param name="sort"></param>        /// <param name="buffered"></param>        /// <returns></returns>        public IEnumerable<T> GetList<T>(object predicate = null, IList<ISort> sort = null,            bool buffered = false) where T : class        {            return DBSession.Connection.GetList<T>(predicate, sort, null, null, buffered, databaseType: DBSession.DatabaseType);        }        /// <summary>        /// 分页        /// </summary>        /// <typeparam name="T"></typeparam>        /// <param name="pageIndex"></param>        /// <param name="pageSize"></param>        /// <param name="allRowsCount"></param>        /// <param name="predicate"></param>        /// <param name="sort"></param>        /// <param name="buffered"></param>        /// <returns></returns>        public IEnumerable<T> GetPageList<T>(int pageIndex, int pageSize, out long allRowsCount,            object predicate = null, IList<ISort> sort = null, bool buffered = true) where T : class        {            if (sort == null)            {                sort = new List<ISort>();            }            IEnumerable<T> entityList = DBSession.Connection.GetPage<T>(predicate, sort, pageIndex, pageSize, null, null, buffered, databaseType: DBSession.DatabaseType);            allRowsCount = DBSession.Connection.Count<T>(predicate, databaseType: DBSession.DatabaseType);            return entityList;        }        /// <summary>        /// 插入单条记录        /// </summary>        /// <typeparam name="T"></typeparam>        /// <param name="entity"></param>        /// <param name="transaction"></param>        /// <returns></returns>        public dynamic Insert<T>(T entity, IDbTransaction transaction = null) where T : class        {            dynamic result = DBSession.Connection.Insert<T>(entity, transaction, databaseType: DBSession.DatabaseType);            return result;        }        /// <summary>        /// 更新单条记录        /// </summary>        /// <typeparam name="T"></typeparam>        /// <param name="entity"></param>        /// <param name="transaction"></param>        /// <returns></returns>        public bool Update<T>(T entity, IDbTransaction transaction = null) where T : class        {            bool isOk = DBSession.Connection.Update<T>(entity, transaction, databaseType: DBSession.DatabaseType);            return isOk;        }        /// <summary>        /// 删除单条记录        /// </summary>        /// <typeparam name="T"></typeparam>        /// <param name="primaryId"></param>        /// <param name="transaction"></param>        /// <returns></returns>        public int Delete<T>(dynamic primaryId, IDbTransaction transaction = null) where T : class        {            var entity = GetById<T>(primaryId);            var obj = entity as T;            int isOk = DBSession.Connection.Delete<T>(obj, databaseType: DBSession.DatabaseType);            return isOk;        }        /// <summary>        /// 删除单条记录        /// </summary>        /// <typeparam name="T"></typeparam>        /// <param name="predicate"></param>        /// <param name="transaction"></param>        /// <returns></returns>         public int DeleteList<T>(object predicate = null, IDbTransaction transaction = null) where T : class        {            return DBSession.Connection.Delete<T>(predicate, transaction, databaseType: DBSession.DatabaseType);        }        /// <summary>        /// 批量插入功能        /// </summary>        /// <typeparam name="T"></typeparam>        /// <param name="entityList"></param>        /// <param name="transaction"></param>        public bool InsertBatch<T>(IEnumerable<T> entityList, IDbTransaction transaction = null) where T : class        {            bool isOk = false;            foreach (var item in entityList)            {                Insert<T>(item, transaction);            }            isOk = true;            return isOk;        }        /// <summary>        /// 批量更新()        /// </summary>        /// <typeparam name="T"></typeparam>        /// <param name="entityList"></param>        /// <param name="transaction"></param>        /// <returns></returns>        public bool UpdateBatch<T>(IEnumerable<T> entityList, IDbTransaction transaction = null) where T : class        {            bool isOk = false;            foreach (var item in entityList)            {                Update<T>(item, transaction);            }            isOk = true;            return isOk;        }        /// <summary>        /// 批量删除        /// </summary>        /// <typeparam name="T"></typeparam>        /// <param name="ids"></param>        /// <param name="transaction"></param>        /// <returns></returns>        public bool DeleteBatch<T>(IEnumerable<dynamic> ids, IDbTransaction transaction = null) where T : class        {            bool isOk = false;            foreach (var id in ids)            {                Delete<T>(id, transaction);            }            isOk = true;            return isOk;        }    }}

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RepositoryBase.cs(IDataRepository的落到实处类卡塔尔国

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using System;using System.Collections.Generic;using System.Data;using Dapper;using DapperExtensions;using HY.DataAccess;namespace HY.ORM{    /// <summary>    /// Repository基类    /// </summary>    public class RepositoryBase : RepositoryServiceBase, IDataRepository    {        public RepositoryBase()        {        }        public new void SetDBSession(IDBSession dbSession)        {            base.SetDBSession(dbSession);        }        public RepositoryBase(IDBSession dbSession)            : base(dbSession)        {        }        /// <summary>        /// 根据条件筛选出数据集合        /// </summary>        /// <typeparam name="T"></typeparam>        /// <param name="sql"></param>        /// <param name="param"></param>        /// <param name="buffered"></param>        /// <returns></returns>        public IEnumerable<T> Get<T>(string sql, dynamic param = null, bool buffered = true) where T : class        {            return DBSession.Connection.Query<T>(sql, param as object, DBSession.Transaction, buffered);        }        /// <summary>        /// 根据条件筛选数据集合        /// </summary>        /// <param name="sql"></param>        /// <param name="param"></param>        /// <param name="buffered"></param>        /// <returns></returns>        public IEnumerable<dynamic> Get(string sql, dynamic param = null, bool buffered = true)        {            return DBSession.Connection.Query(sql, param as object, DBSession.Transaction, buffered);        }        /// <summary>        /// 分页查询        /// </summary>        /// <typeparam name="T"></typeparam>        /// <param name="pageIndex"></param>        /// <param name="pageSize"></param>        /// <param name="allRowsCount"></param>        /// <param name="sql"></param>        /// <param name="param"></param>        /// <param name="allRowsCountSql"></param>        /// <param name="allRowsCountParam"></param>        /// <param name="buffered"></param>        /// <returns></returns>        public IEnumerable<T> GetPage<T>(int pageIndex, int pageSize, out long allRowsCount, string sql, dynamic param = null, string allRowsCountSql = null, dynamic allRowsCountParam = null, bool buffered = true) where T : class        {            IEnumerable<T> entityList = DBSession.Connection.GetPage<T>(pageIndex, pageSize, out allRowsCount, sql, param as object, allRowsCountSql, null, null, buffered, databaseType: DBSession.DatabaseType);            return entityList;        }        /// <summary>        /// 根据表达式筛选        /// </summary>        /// <typeparam name="TFirst"></typeparam>        /// <typeparam name="TSecond"></typeparam>        /// <typeparam name="TReturn"></typeparam>        /// <param name="sql"></param>        /// <param name="map"></param>        /// <param name="param"></param>        /// <param name="transaction"></param>        /// <param name="buffered"></param>        /// <param name="splitOn"></param>        /// <param name="commandTimeout"></param>        /// <returns></returns>        public IEnumerable<TReturn> Get<TFirst, TSecond, TReturn>(string sql, Func<TFirst, TSecond, TReturn> map,            dynamic param = null, IDbTransaction transaction = null, bool buffered = true, string splitOn = "Id",            int? commandTimeout = null)        {            return DBSession.Connection.Query(sql, map, param as object, transaction, buffered, splitOn);        }        /// <summary>        /// 根据表达式筛选        /// </summary>        /// <typeparam name="TFirst"></typeparam>        /// <typeparam name="TSecond"></typeparam>        /// <typeparam name="TReturn"></typeparam>        /// <param name="sql"></param>        /// <param name="map"></param>        /// <param name="param"></param>        /// <param name="transaction"></param>        /// <param name="buffered"></param>        /// <param name="splitOn"></param>        /// <param name="commandTimeout"></param>        /// <returns></returns>        public IEnumerable<TReturn> Get<TFirst, TSecond, TThird, TReturn>(string sql, Func<TFirst, TSecond, TThird, TReturn> map,            dynamic param = null, IDbTransaction transaction = null, bool buffered = true, string splitOn = "Id",            int? commandTimeout = null)        {            return DBSession.Connection.Query(sql, map, param as object, transaction, buffered, splitOn);        }        /// <summary>        /// 获取多实体集合        /// </summary>        /// <param name="sql"></param>        /// <param name="param"></param>        /// <param name="transaction"></param>        /// <param name="commandTimeout"></param>        /// <param name="commandType"></param>        /// <returns></returns>        public SqlMapper.GridReader GetMultiple(string sql, dynamic param = null, IDbTransaction transaction = null,            int? commandTimeout = null, CommandType? commandType = null)        {            return DBSession.Connection.QueryMultiple(sql, param as object, transaction, commandTimeout, commandType);        }        /// <summary>        /// 执行sql操作        /// </summary>        /// <param name="sql"></param>        /// <param name="param"></param>        /// <returns></returns>        public int Execute(string sql, dynamic param = null, IDbTransaction transaction = null)        {            return DBSession.Connection.Execute(sql, param as object, transaction);        }    }}

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谈到DapperExtensions改善的小地方还蛮多的,下图是二个代码相比的截图。所以一会把代码打包贴上来吧。

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上述代码就足以编写翻译成 HY.ORM.DLL文件了。

上边就能够在 本身业务层继承HY.ORM中的RepositoryServiceBase类 ,数据层世襲HY.ORM中的 RepositoryBase类。

透过个别的构造函数或许,SetDBSession(Helper.CreateDBSession; 实行多少连接起头化。

接下去配置实体类和DB的照耀:

    public class DemoEntity    {                public int ID { get; set; }        public string Name { get; set; }    }    [Serializable]    public class DomoEntityORMMapper : ClassMapper<DemoEntity>    {        public DomoEntityORMMapper()        {            base.Table("Demo");            //Map(f => f.UserID).Ignore();//设置忽略            //Map(f => f.Name).Key(KeyType.Identity);//设置主键  (如果主键名称不包含字母“ID”,请设置)                       AutoMap();        }    }

这么就足以在类中 完成 this.Get<德姆oEntity>("select * from 德姆o where ID=@ID", new { ID = 1 }); 那样的语法了。

具体的接纳方发

下图是自家要介绍达成的花色截图:

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实际上也是三层,只是名字区别等而已。

HY.Web

HY.Web.Iservice

HY.Web.Service(服务层,HY.Web.Iservice的达成类, 你也足以领略为业务逻辑层BLL卡塔尔

HY.Web.DAO(数据访问层, 你也足以精晓为DAL卡塔 尔(英语:State of Qatar)

HY.Web.Entity(实体层, 最近只定义了数码实体, 倘使你的类别须求给app提供数据, 那么传输的多寡要精练,就需求单独定义DTO了。 )

就那顾客表来做个实例吧澳门新葡亰官网APP,,表结构如下:(下图是用代码生成器截图效果,能够一贯更改数据库的描述音信,开荒利器。要求的冤家点这里【CodeBuilder-RazorEngine】卡塔尔

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HY.Web.Entity

在HY.Web.Entity的体系中新建Sys_UsersEntity.cs 定义实体类

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HY.Web.DAO

概念基类 BaseRepository.cs (能够安装暗许的DBsession,方便扩大此外东东卡塔 尔(阿拉伯语:قطر‎

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定义数据访谈层 Sys_UsersRepository.cs (代码里能够打包任何供给写sql 的代码卡塔尔国

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HY.Web.IService

概念接口 ISys_UsersService.cs ,提供给UI访问。

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HY.Web.Service

定义BaseService.cs,(能够安装暗许的DBsession,方便增加其余东东卡塔 尔(阿拉伯语:قطر‎

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定义Sys_UsersService.cs, 去实现ISys_UsersService。

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HY.Web

1、定义相关的Controller

2、ISys_UsersService iSys_UsersService = new Sys_UsersService(); (那块其实可以行使 IoC, 相关内容且听后续分解卡塔 尔(英语:State of Qatar)

3、调用接口

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**下载:**

HY.DataAccess

矫正后的DapperExtensions:Dapperextensions.RAR

ps:已经更新版本了, 参加了对lambda的恢宏,点击这里步入

连锁作品:

搭建一套本人实用的.net框架结构

搭建后生可畏套自个儿实用的.net架构【日志模块-log4net】

搭建大器晚成套本身实用的.net框架结构【ORM-Dapper+DapperExtensions】

搭建大器晚成套本身实用的.net架构续 【ORM Dapper+DapperExtensions+Lambda】

搭建生龙活虎套本人实用的.net架构【CodeBuilder-RazorEngine】

原来的文章链接:

本文由澳门新葡亰app发布于澳门新葡亰,转载请注明出处:澳门新葡亰app2、支持的数据库还蛮多的,该Sql

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