#region 帮助实例：SQL 批量插入数据 多种方法
     /// <summary>
        /// SqlBulkCopy往数据库中批量插入数据
        /// </summary>
        /// <param name="sourceDataTable">数据源表</param>
        /// <param name="targetTableName">服务器上目标表</param>
        /// <param name="mapping">创建新的列映射，并使用列序号引用源列和目标列的列名称。</param>
        public static void BulkToDB(DataTable sourceDataTable, string targetTableName, SqlBulkCopyColumnMapping[] mapping)
        {
            /*  调用方法 -2012年11月16日编写
            //DataTable dt = Get_All_RoomState_ByHID();
            //SqlBulkCopyColumnMapping[] mapping = new SqlBulkCopyColumnMapping[4];
            //mapping[0] = new SqlBulkCopyColumnMapping("Xing_H_ID", "Xing_H_ID");
            //mapping[1] = new SqlBulkCopyColumnMapping("H_Name", "H_Name");
            //mapping[2] = new SqlBulkCopyColumnMapping("H_sName", "H_sName");
            //mapping[3] = new SqlBulkCopyColumnMapping("H_eName", "H_eName");
            //BulkToDB(dt, "Bak_Tts_Hotel_Name", mapping);
            */
            SqlConnection conn = new SqlConnection(SQLHelper.ConnectionString);
            SqlBulkCopy bulkCopy = new SqlBulkCopy(conn);   //用其它源的数据有效批量加载sql server表中
            bulkCopy.DestinationTableName = targetTableName;    //服务器上目标表的名称
            bulkCopy.BatchSize = sourceDataTable.Rows.Count;   //每一批次中的行数

            try
            {
                conn.Open();
                if (sourceDataTable != null && sourceDataTable.Rows.Count != 0)
                {
                    for (int i = 0; i < mapping.Length; i++)
                        bulkCopy.ColumnMappings.Add(mapping[i]);

                    //将提供的数据源中的所有行复制到目标表中
                    bulkCopy.WriteToServer(sourceDataTable );   
                }
            }
            catch (Exception ex)
            {
                //throw ex;
                Common.WriteTextLog("BulkToDB", ex.Message);
            }
            finally
            {
                conn.Close();
                if (bulkCopy != null)
                    bulkCopy.Close();
            }
        }
        /// <summary>
        /// SQL2008以上方可支持自定义表类型 :调用存储过程游标-往数据库中批量插入数据 ，注意
        /// </summary>
        /// <param name="sourceDataTable"></param>
        public void DataTableToHotelDB(DataTable sourceDataTable)
        {
            /*  -2012年11月15日编写
                ALTER PROCEDURE [dbo].[P_InsertSubject]
                @tempStudentID int
                AS
                DECLARE rs CURSOR LOCAL SCROLL FOR
                select H_ID from Tts_Hotel_Name 
                OPEN rs
                FETCH NEXT FROM rs INTO @tempStudentID
                WHILE @@FETCH_STATUS = 0
                BEGIN
                Insert student (tempStudentID) values (@tempStudentID)
                FETCH NEXT FROM rs INTO @tempStudentID
                END
                CLOSE rs
             *  ***************************************************************
             *  create table Orders
                (
                Orders_ID int identity(1,1) primary key,
                ItemCode nvarchar(50) not null,
                UM nvarchar(20) not null,
                Quantity decimal(18,6) not null,
                UnitPrice decimal(18,6) not null
                )

                --创建用户自定义表类型，在可编程性->类型性->用户自定义表类型
                create type OrdersTableType as table
                (
                ItemCode nvarchar(50) not null,
                UM nvarchar(20) not null,
                Quantity decimal(18,6) not null,
                UnitPrice decimal(18,6) not null
                )
                go

                create procedure Pro_Orders
                (
                    @OrdersCollection OrdersTableType readonly
                )
                as
                insert into Orders([ItemCode],[UM],[Quantity],[UnitPrice])
                    SELECT oc.[ItemCode],oc.[UM],[Quantity],oc.[UnitPrice] FROM @OrdersCollection AS oc;
    
                go
             * 
             */

            SqlParameter[] parameters = {new SqlParameter("@OrdersCollection", SqlDbType.Structured)};
            parameters[0].Value = sourceDataTable;
            new SQLHelper().ExecuteScalar("P_DataTable_ToHotelDB", parameters, true);
        }
        #endregion

  #region 使用SqlBulkCopy将DataTable中的数据批量插入数据库中
        /// <summary>
        /// 使用SqlBulkCopy将DataTable中的数据批量插入数据库中
        /// </summary>
        /// <param name="strTableName">数据库中对应的表名</param>
        /// <param name="dtData">数据集</param>
        public void SqlBulkCopyInsert(string strTableName, DataTable dtData)
        {
            string ConStr = connectionString;// 数据库连接字符串

            try
            {
                using (SqlBulkCopy sqlRevdBulkCopy = new SqlBulkCopy(ConStr))//引用SqlBulkCopy
                {
                    sqlRevdBulkCopy.DestinationTableName = strTableName;//数据库中对应的表名

                    sqlRevdBulkCopy.NotifyAfter = dtData.Rows.Count;//有几行数据

                    sqlRevdBulkCopy.WriteToServer(dtData);//数据导入数据库

                    sqlRevdBulkCopy.Close();//关闭连接
                }
            }
            catch (Exception ex)
            {
                WriteErrorLog(ex.Message + "数据库处理出错654行。SqlBulkCopyInsert");
                throw (ex);
            }
        }
        #endregion

        private static void DataTableToSQLServer( DataTable dt)
        {
            string connectionString = GetConnectionString();

            using (SqlConnection destinationConnection =new SqlConnection(connectionString))
            {
                destinationConnection.Open();

                using (SqlBulkCopy bulkCopy =new SqlBulkCopy(destinationConnection))
                {


                    try
                    {

                        bulkCopy.DestinationTableName = "T_EIInformation";//要插入的表的表明
                        bulkCopy.ColumnMappings.Add("Email", "Email");//映射字段名 DataTable列名 ,数据库 对应的列名
                        bulkCopy.ColumnMappings.Add("author", "author");
                        bulkCopy.ColumnMappings.Add("Title", "Title");
                        bulkCopy.ColumnMappings.Add("Type", "Type");
                        bulkCopy.ColumnMappings.Add("confName", "confName");
                        bulkCopy.ColumnMappings.Add("Language", "Language");
                        bulkCopy.ColumnMappings.Add("Publicationyear", "Publicationyear");
                        bulkCopy.ColumnMappings.Add("Conferencelocation", "Conferencelocation");
                        bulkCopy.WriteToServer(dt);
                    }
                    catch (Exception ex)
                    {
                        Console.WriteLine(ex.Message);
                    }
                    finally
                    {
                        // Close the SqlDataReader. The SqlBulkCopy
                        // object is automatically closed at the end
                        // of the using block.
                       
                    }
                }

       
            }
            
        }