SqlBulkCopy与触发器，批量插入表(存在则更新,不存在则插入)

原文: SqlBulkCopy与触发器，批量插入表(存在则更新,不存在则插入)

临时表：Test

/****** 对象:  Table [dbo].[Test]    脚本日期: 05/10/2013 11:42:07 ******/

SET ANSI_NULLS ON

GO

SET QUOTED_IDENTIFIER ON

GO

CREATE TABLE [dbo].[Test](

    [ID] [int] IDENTITY(1,1) NOT NULL,

    [UserID] [int] NOT NULL,

    [UserName] [nvarchar](50) COLLATE Chinese_PRC_CI_AS NULL,

 CONSTRAINT [PK_Test] PRIMARY KEY CLUSTERED 

(

    [ID] ASC

)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]

) ON [PRIMARY]

 

临时表的触发器：tri_edit

CREATE TRIGGER [tri_edit]  ON [dbo].[Test] 

instead of insert 

as


declare @temp int 

select @temp= inserted.UserID from inserted

--更新已经存在的主键(更新全部字段)
if(@temp IS Not NULL )

update [Test] set UserQQ=inserted.UserQQ
from [Test]  join inserted  on [Test].UserID=inserted.UserID

else --(更新指定的部分字段)

 

update [Test] set UserName=inserted.UserName
from [Test]  join inserted  on [Test].UserID=inserted.UserID

 

--插入存在的主键数据
insert [Test] (UserID,UserName)
select inserted.UserID,inserted.UserName
from inserted  left join [Test]  on inserted.UserID=[Test].UserID
where [Test].id is null

go

 

C#  SqlBulkCopy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 - 2013年05月10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);

            */

             using (SqlConnection conn = new SqlConnection(DBHelper.ConnectionString))
            {
                //SqlBulkCopy bulkCopy = new SqlBulkCopy(conn);   //用其它源的数据有效批量加载sql server表中
                //指定大容量插入是否对表激发触发器。此属性的默认值为 False。
                SqlBulkCopy bulkCopy = new SqlBulkCopy(DBHelper.ConnectionString, SqlBulkCopyOptions.FireTriggers);
                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
                //bulkCopy.BulkCopyTimeout = 300; //超时之前操作完成所允许的秒数,大批量数量需要的时长5分钟,2013-11-6备注 报错：“超时时间已到。在操作完成之前超时时间已过或服务器未响应”  解决办法：   

          
                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);
                }
            }

C# 调用BulkToDB方法：

int kk = Environment.TickCount;

            DataTable dt = new DataTable();

            dt.Columns.Add(new DataColumn("UserID", typeof(string)));

            dt.Columns.Add(new DataColumn("UserName", typeof(string)));

            for (int k = 0; k < 10000; k++) //40000

            {

                DataRow dr = dt.NewRow();

                dr["UserID"] = k;

                dr["UserName"] = "8888 - " + k;

                dt.Rows.Add(dr);

            }

            SqlBulkCopyColumnMapping[] mapp = new SqlBulkCopyColumnMapping[2];

            mapp[0] = new SqlBulkCopyColumnMapping("UserID", "UserID");

            mapp[1] = new SqlBulkCopyColumnMapping("UserName", "UserName");    

            //提交任务表

            BulkToDB(dt, "Test", mapp);

            int exeg = Environment.TickCount - kk;

            MessageBox.Show(exeg.ToString());

                  

动态加载数据列名：

 SqlBulkCopyColumnMapping[] mapp = new SqlBulkCopyColumnMapping[dt.Columns.Count];                    

                    for (int j = 0; j < dt.Columns.Count; j++)

                    {

                        mapp[j] = new SqlBulkCopyColumnMapping(dt.Columns[j].ColumnName, dt.Columns[j].ColumnName);                       

                    }

 

1、--处理的触发器示例

create trigger tr_insert on 表

instead of insert  --注意触发器的类型

as

--更新已经存在的主键

update 表 set name=b.name,sex=b.sex

from 表 a join inserted b on a.id=b.id



--插入存在的主键数据

insert 表

select a.*

from inserted a left join 表 b on a.id=b.id

where b.id is null

go

——————————————————————————————————————————



2、--触发器

CREATE TRIGGER tri_edit  ON tab

INSTEAD OF INSERT

AS



if exists(select col1,col2 from tab join inserted on tab.学号=INSERTED.学号)

 begin

--这里面你可以加如些其他修改操作,取决于具体的功能

        update tab set col1='num1' from tab join inserted on tab.学号=inserted.学号

 end

else

 insert tab  select * from inserted

GO