数据库异步数据读取
几天在网上看到了一个数据的异步读取方法 记录下来以后也许能用得上。
public void getdata()
{
SqlConnection cn = new SqlConnection("server=.;database=salesdb_temp;uid=***;pwd=***;Asynchronous Processing = true");
SqlCommand cmd = new SqlCommand("select top 2000000 CompanyCD ,BranchCD,JAN from mst_Product_20080327", cn);
Response.Write("start ![](https://www.cnblogs.com/Images/dot.gif)
![](https://www.cnblogs.com/Images/dot.gif)
![](https://www.cnblogs.com/Images/dot.gif)
.\n");
try
{
cn.Open();
IAsyncResult ar = cmd.BeginExecuteReader();
Response.Write("here is do other things
..\n");
int sum = 0;
for (int i = 0; i < 1000; i++)
{
sum = sum + i;
}
Response.Write(sum);
Response.Write("do other things finish!
..\n");
SqlDataReader r = cmd.EndExecuteReader(ar);
this.GridView1.DataSource = r;
this.GridView1.DataBind();
r.Close();
}
catch(Exception ex)
{
Response.Write(ex.Message);
}
finally
{
cn.Close();
cmd.Clone();
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
}
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
}
其中最主要的就是在连接字符串的时候加上
Asynchronous Processing = true
另外对于线程的操作还有很多不熟悉的地方 以后多多努力。
资料参考
http://blog.csdn.net/ljianl/archive/2007/04/10/1559410.aspx
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![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/dot.gif)
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![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/dot.gif)
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![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](https://www.cnblogs.com/Images/dot.gif)
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![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif)
其中最主要的就是在连接字符串的时候加上
Asynchronous Processing = true
另外对于线程的操作还有很多不熟悉的地方 以后多多努力。
资料参考
http://blog.csdn.net/ljianl/archive/2007/04/10/1559410.aspx