在Global.asax.cs文件中
 
protected void Application_BeginRequest(Object sender, EventArgs e)
{
 Application["StartTime"] = System.DateTime.Now;
}

protected void Application_EndRequest(Object sender, EventArgs e)
{
 System.DateTime startTime = (System.DateTime)Application["StartTime"];
 System.DateTime endTime = System.DateTime.Now;
 System.TimeSpan ts = endTime - startTime;
 Response.Write("页面执行时间:"+ ts.Milliseconds +" 毫秒");
}