.net2.0,如何获取页面执行时间?

Question

.net2.0,如何获取页面执行时间?就像搜索引擎那样的.

Answer 1

using System;
using System.Data;
using System.Configuration;
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.Runtime.InteropServices;
/// <summary>
/// GetTimerClass 的摘要说明
/// </summary>
public class GetTimerClass
{
    public GetTimerClass()
    {
        //
        // TODO: 在此处添加构造函数逻辑
        //
    }    [DllImport("kernel32.dll")]
    static extern bool QueryPerformanceCounter([In, Out] ref long lpPerformanceCount);
    [DllImport("kernel32.dll")]
    static extern bool QueryPerformanceFrequency([In, Out] ref long lpFrequency);    static long _f = 0;    static public long GetTickCount()
    {
        long f = _f;        if (f == 0)
        {
            if (QueryPerformanceFrequency(ref f))
            {
                _f = f;
            }
            else
            {
                _f = -1;
            }
        }
        if (f == -1)
        {
            return Environment.TickCount * 10000;
        }
        long c = 0;
        QueryPerformanceCounter(ref c);
        return (long)(((double)c) * 1000 * 10000 / ((double)f));
    }    //GetTickCount()为0时的DateTime.Ticks值
    static long _tc = 0;    //这个返回的不是真正的精确时间，但时间与时间的差是精确的。
    //GetExactNow与DateTime.Now的偏差比DateTime.Now的精度还要小，所以该偏差
    static public DateTime GetExactNow()
    {
        if (_tc == 0)
        {
            long tc = GetTickCount();
            DateTime dt = DateTime.Now;
            _tc = dt.Ticks - tc;
            return dt;
        }        return new DateTime(_tc + GetTickCount());
    }
}
//Global.asax
    void Application_BeginRequest(Object sender, EventArgs e)
    {
        Utility.Login();
        Context.Items["BeginRequestTickCount"] = GetTimerClass.GetTickCount();
        //string img = @"<div id=img style=position:absolute;><img src=images/xxx.gif border=1></div>";
        //System.Web.HttpContext.Current.Response.Write(img);    }页面执行时间：<%=new TimeSpan(GetTimerClass.GetTickCount() - (long)Context.Items["BeginRequestTickCount"]).TotalMilliseconds%>

Answer 2

DateTime BeginTime = DateTime.Now;
//........执行长时间的代码DateTime EndTime = DateTime.Now;
this.lblInfo.Text = 共执行 " + EndTime.Subtract(BeginTime) + "！";