.NET的file文件上传控件使用方法 修改web.config文件上传大文件

<system.web> 
<httpRuntime maxRequestLength="40690" 
useFullyQualifiedRedirectUrl="true" 
executionTimeout="6000" 
useFullyQualifiedRedirectUrl="false" 
minFreeThreads="8" 
minLocalRequestFreeThreads="4" 
appRequestQueueLimit="100" 
enableVersionHeader="true" 
/> 
</system.web>

maxRequestLength

executionTimeout

<customErrors mode="On"/>

public class UploadError : System.Web.UI.Page 
{ 
private void Page_Load(object sender, System.EventArgs e) 
{ 
Exception ex = Server.GetLastError(); 
if (ex != null) 
{ 
Response.Redirect("../error.aspx"); 
} 
else //前台错误ex为空值 
{ 
Response.Redirect("uploadexcel.aspx?err=1"); //重新跳转到上传页面， 
加上err参数是为了显示错误信息 
} 
}

public class uploadexcel : System.Web.UI.Page 
{ 
private void Page_Load(object sender, System.EventArgs e) 
{ 
if (Request["err"] == "1") 
{ 
Page.RegisterStartupScript("budget","<script language = javascript> 
alert('Upload file has failed ! File size is too large !')</script>"); 
} 
} 
}