SqlBulkCopy(批量复制)使用方法 && SqlDataAdapter Update

       SqlBulkCopy提供了一种将数据复制到Sql Server数据库表中高性能的方法。SqlBulkCopy 包含一个方法 WriteToServer，它用来从数据的源复制数据到数据的目的地。 WriteToServer方法可以处理的数据类型有DataRow[]数组，DataTable 和 DataReader。 你可以根据不同的情形使用不同的数据类型。SqlBulkCopy其原理是采用了SQL Server的BCP协议进行数据的批量复制。

SqlBulkCopy(批量复制)：批量复制速度极快

        /// <summary>
        /// 数据库中的表复制到另一个数据库中的表
        /// </summary>
        private static void SqlBulkCopyMethod(string connectionStr1, string connectionStr2)
        {
            try
            {
                using (SqlConnection connetionPub = new SqlConnection(connectionStr1))
                {
                    SqlCommand commandPub = connetionPub.CreateCommand();
                    using (commandPub)
                    {
                        commandPub.CommandText = "select top 100 * from Person";
                        commandPub.CommandType = System.Data.CommandType.Text;
                        connetionPub.Open();

                        SqlConnection connectionBulkCopy = new SqlConnection(connectionStr2);
                        using (connectionBulkCopy)
                        {
                            connectionBulkCopy.Open();
                            SqlDataReader dataReader = commandPub.ExecuteReader();
                            SqlBulkCopy bulkCopy = new SqlBulkCopy(connectionBulkCopy);
                            using (bulkCopy)
                            {
                                bulkCopy.BulkCopyTimeout = 3600;
                                bulkCopy.BatchSize = 300000;//BatchSize的意思就是同每一批次中的行数，在每一批次结束时，就将该批次中的行发送到数据库
                                bulkCopy.NotifyAfter = 1;
                                bulkCopy.SqlRowsCopied += new SqlRowsCopiedEventHandler(bulkCopy_SqlRowsCopied);//bulkCopy对象提供了一个SqlRowCopied事件，在每次处理完NotifyAfter属性指定的行数时发生
                                bulkCopy.DestinationTableName = "Person";
                                bulkCopy.WriteToServer(dataReader);
                            }
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }
        public static void bulkCopy_SqlRowsCopied(object obj, SqlRowsCopiedEventArgs e)
        {
            //执行事件处理方法
        }

        /// <summary>
        /// 将表中资料批量插入到数据库
        /// </summary>
        /// <param name="connectionString"></param>
        /// <param name="TableName"></param>
        /// <param name="dt"></param>
        private void SqlBulkCopyByDatatable(string connectionString, DataTable dt)
        {
            using (SqlConnection conn = new SqlConnection(connectionString))
            {
                using (SqlBulkCopy sqlbulkcopy = new SqlBulkCopy(connectionString, SqlBulkCopyOptions.UseInternalTransaction))
                {
                    try
                    {
                        sqlbulkcopy.DestinationTableName = "Person";
                        for (int i = 0; i < dt.Columns.Count; i++)
                        {
                            sqlbulkcopy.ColumnMappings.Add(dt.Columns[i].ColumnName, dt.Columns[i].ColumnName);
                        }
                        sqlbulkcopy.WriteToServer(dt);
                    }
                    catch (System.Exception ex)
                    {
                        throw ex;
                    }
                }
            }
        }

        /// <summary>
        /// 不同表之间复制数据
        /// </summary>
        private static void PerformBulkCopyDifferentSchema(string connectionString)
        {
            var stopwatch = new Stopwatch();
            DataTable sourceData = new DataTable();
            // 源 
            stopwatch.Start();
            using (SqlConnection sourceConnection = new SqlConnection(connectionString))
            {
                SqlCommand myCommand = new SqlCommand("SELECT * FROM Person", sourceConnection);
                sourceConnection.Open();
                SqlDataReader reader = myCommand.ExecuteReader();
                // 目的
                using (SqlConnection destinationConnection = new SqlConnection(connectionString))
                {
                    // 打开连接
                    destinationConnection.Open();
                    using (SqlBulkCopy bulkCopy = new SqlBulkCopy(connectionString))
                    {
                        bulkCopy.ColumnMappings.Add("PersonId", "NEW_PersonId");
                        bulkCopy.ColumnMappings.Add("Name", "NEW_Name");
                        bulkCopy.ColumnMappings.Add("Age", "NEW_Age");
                        bulkCopy.DestinationTableName = "New_Person";
                        bulkCopy.WriteToServer(reader);
                    }
                }
                Console.WriteLine(stopwatch.ElapsedMilliseconds);
                reader.Close();
            }
        }

        /// <summary>
        /// 使用XML作为数据源
        /// </summary>
        private static void PerformBulkCopyXMLDataSource(string connectionString)
        {
            DataSet ds = new DataSet();
            DataTable sourceData = new DataTable();
            ds.ReadXml(@"E:\Study\SQL\MSSQL\MSSQL_SqlBulkCopy\MSSQL_SqlBulkCopy\PersonFile.xml");
            sourceData = ds.Tables[0];
            // 目的 
            using (SqlConnection destinationConnection = new SqlConnection(connectionString))
            {
                // 打开连接 
                destinationConnection.Open();
                using (SqlBulkCopy bulkCopy = new SqlBulkCopy(connectionString))
                {
                    // 列映射
                    //bulkCopy.ColumnMappings.Add("PersonId", "NEW_PersonId");
                    //bulkCopy.ColumnMappings.Add("Name", "NEW_Name");
                    //bulkCopy.ColumnMappings.Add("Age", "NEW_Age");
                    bulkCopy.DestinationTableName = "New_Person";
                    bulkCopy.WriteToServer(sourceData);
                }
            }
        }

  SqlDataAdapter  Update：适用于批量更新数据

        /// <summary>
        /// SqlDataAdapter  Update
        /// </summary>
        private static void PerformSqlDataAdapterUpdate(string connectionString)
        {
            using (SqlConnection conn = new SqlConnection(connectionString))
            {
                DataSet ds = new DataSet();
                DataSet ds_new = new DataSet();
                string SQLstr = "Select top 100 * from Person";
                string SQLstr_new = "Select top 0  * from New_Person";
                conn.Open();
                SqlCommand comm = new SqlCommand(SQLstr_new, conn);
                SqlDataAdapter sad = new SqlDataAdapter(comm);
                SqlCommandBuilder scb = new SqlCommandBuilder(sad);
                sad.Fill(ds_new);
                SqlDataAdapter sda = new SqlDataAdapter(new SqlCommand(SQLstr, conn));
                sda.Fill(ds);
                for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
                {
                    DataRow NewRow = ds_new.Tables[0].NewRow();
                    NewRow[0] = ds.Tables[0].Rows[i][0];
                    NewRow[1] = ds.Tables[0].Rows[i][1];
                    NewRow[2] = ds.Tables[0].Rows[i][2];

                    ds_new.Tables[0].Rows.Add(NewRow);
                }
                // ds_new.AcceptChanges();
                sad.Update(ds_new.GetChanges());
            }
        }

 代码：https://files.cnblogs.com/files/imhaiyang/MSSQL_SqlBulkCopy.rar

 转载：http://www.cnblogs.com/scottckt/archive/2011/02/16/1955862.html