转自：http://blog.csdn.net/huaer1011/article/details/2312361
在.Net1.1中无论是对于批量插入整个DataTable中的所有数据到数据库中，还是进行不同数据源之间的迁移，都不是很方便。而在.Net2.0中，SQLClient命名空间下增加了几个新类帮助我们通过DataTable或DataReader批量迁移数据。数据源可以来自关系数据库或者XML文件，甚至WebService返回结果。其中最重要的一个类就是SqlBulkCopy类，使用它可以很方便的帮助我们把数据源的数据迁移到目标数据库中。
下面我们先通过一个简单的例子说明这个类的使用：
首先:web.config
<connectionStrings>
<add name="srcDBConnection" connectionString="server=.;database=pubs;uid=sa;pwd="/>
<add name="desDBConnection" connectionString="server=.;database=NorthWind;uid=sa;pwd="/>
</connectionStrings>
C#文件: 前台不Copy了,就一个按钮,一个Label
using System; using System.Data; using System.Configuration; using System.Collections; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using System.Data.SqlClient; public partial class ASP_NET : System.Web.UI.Page { private DateTime startTime; protected void Button1_Click(object sender, EventArgs e) { startTime = DateTime.Now; string srcConnString = ""; string desConnString = ""; SqlConnection srcConnection = new SqlConnection(); SqlConnection desConnection = new SqlConnection(); SqlCommand sqlcmd = new SqlCommand(); SqlDataAdapter da = new SqlDataAdapter(); DataTable dt = new DataTable(); //srcConnString = ConfigurationManager.ConnectionStrings["srcDBConnection"].ConnectionString; desConnString = ConfigurationManager.ConnectionStrings["desDBConnection"].ToString(); //srcConnection.ConnectionString = srcConnString; srcConnection.ConnectionString = desConnString; sqlcmd.Connection = srcConnection; //sqlcmd.CommandText = "select * from jobs"; sqlcmd.CommandText = "select * from abc"; sqlcmd.CommandType = CommandType.Text; sqlcmd.Connection.Open(); da.SelectCommand = sqlcmd; da.Fill(dt); SqlBulkCopy sbc = new SqlBulkCopy(desConnString,SqlBulkCopyOptions.UseInternalTransaction); sbc.BulkCopyTimeout = 5000; sbc.SqlRowsCopied +=new SqlRowsCopiedEventHandler(OnRowsCopied); sbc.NotifyAfter = dt.Rows.Count; try { // sbc.DestinationTableName = "jobs"; sbc.DestinationTableName = "bcd"; sbc.WriteToServer(dt); } catch (Exception ex) { lblCounter.Text = ex.Message.ToString(); } finally { sqlcmd.Clone(); srcConnection.Close(); desConnection.Close(); } } private void OnRowsCopied(object sender, SqlRowsCopiedEventArgs args) { lblCounter.Text += args.RowsCopied.ToString() + " rows are copied<Br>"; TimeSpan copyTime = DateTime.Now - startTime; lblCounter.Text += "Copy Time:" + copyTime.Seconds.ToString() + "." + copyTime.Milliseconds.ToString() + " seconds"; } }
代码分析:
sbc.BulkCopyTimeout = 5000000; //指定操作完成的Timeout时间
性能方面:我在Sql中用proc插入68万条数据花了近8分钟,用SqlBulkCopy花了53.234秒~,效率高了7倍耶!不过现在也不做这方面的底层了,呵呵,把自己写的一个测试存储过程也贴上吧,方便自己学习
create table abc ( aid int identity(1,1) primary key, adesc varchar(50) not null ) go /**********存储过程**********************/ create proc addData as declare @i int set @i=1 while @i < 1000000 begin insert into abc values (‘testDescription‘) set @i = @i + 1 end go select * into titles from pubs.dbo.titles where 1> 3 复制跨数据库的表结构