第一步：建立所有页面的基类

PageBase.cs

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.Collections.Generic;
using System.Text;
using System.IO;
/// <summary>
/// PageBase 的摘要说明
/// </summary>
public class PageBase : Page
{
public PageBase()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
#region Overriden
protected override void OnInit(EventArgs e)
{
base.OnInit(e);
//计算时间执行时间
if (this.MeasureExecutionTime)
{
watch = new System.Diagnostics.Stopwatch();
watch.Start();
this.RecordTimeStamp("页面开始执行……");
}
}
protected override void OnLoad(EventArgs e)
{
base.OnLoad(e);
}
protected override void OnPreRenderComplete(EventArgs e)
{
base.OnPreRenderComplete(e);
if (this.MeasureExecutionTime)
{
this.RecordTimeStamp("Page execution complete...");
watch.Stop();
Control addExecutionTo = this.Form;
if (addExecutionTo == null)
addExecutionTo = this;
addExecutionTo.Controls.Add(new LiteralControl("<br /><br />"));
StringBuilder timestampsOutput = new StringBuilder(50 * this.ExcutionTimeStamps.Count);
for (int i = 0; i < this.ExcutionTimeStamps.Count; i++)
timestampsOutput.AppendFormat("<b>Timestamp {0}</b>: {1:N0} ms ({2})<br />{3}",
i + 1, this.ExcutionTimeStamps[i].TimeStamp,
this.ExcutionTimeStamps[i].Description, Environment.NewLine);
addExecutionTo.Controls.Add(new LiteralControl(timestampsOutput.ToString()));
}
}
#endregion
#region Members
#endregion
#region FindControlRecursive  迭代查找控件
protected virtual Control FindControlRecursive(string id)
{
return FindControlRecursive(id, this);
}
/// <summary>
/// 迭代查找控件
/// </summary>
/// <param name="id">查找控件的编号</param>
/// <param name="parent">控件容器</param>
/// <returns>Control</returns>
protected virtual Control FindControlRecursive(string id, Control parent)
{
// if parent is the control we‘re looking for, return it
if (string.Compare(parent.ID, id, true) == 0)
return parent;
//search through children
foreach (Control child in parent.Controls)
{
Control match = FindControlRecursive(id, child);
if (match != null)
return match;
}
//if we reach here then no control width id was found.
return null;
}
#endregion
#region ExecutionTime 执行时间
/// <summary>
/// 是否开启计算页面计算时间
/// </summary>
public virtual bool MeasureExecutionTime
{
get {
object o = ViewState["MeasureExecutionTime"];
return o == null ? false : (bool)o;
}
set {
ViewState["MeasureExecutionTime"] = value;
}
}
private System.Diagnostics.Stopwatch watch = null;
private List<TimeStampInfo> timeStamps = null;
/// <summary>
/// 页面执行时间集合
/// </summary>
protected virtual List<TimeStampInfo> ExcutionTimeStamps
{
get {
if (timeStamps == null)
timeStamps = new List<TimeStampInfo>();
return timeStamps;
}
}
/// <summary>
/// 记录页面执行时间
/// </summary>
/// <param name="desc"></param>
protected virtual void RecordTimeStamp(string desc)
{
if (watch == null)
throw new ArgumentException("要记录页面的执行时间 MeasureExecutionTime 必须设置为 true.");
ExcutionTimeStamps.Add(new TimeStampInfo(watch.ElapsedMilliseconds,desc));
}
#endregion
}

首先用一个变量MeasureExecutionTime来保存页面是否需要计算出执行的时间，然后重写页面的OnInit事件 ，当需要计算页面执行的时间则启动Stopwatch。

最后在OnPreRenderComplete中输出计算的结果。

第二步：建立需要计算页面执行时间的页面

其页面的测试如下：

Default.aspx.cs

 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;
public partial class _Default :PageBase
{
protected void Page_Init(object sender, EventArgs e)
{
base.MeasureExecutionTime = true;
}
protected void Page_Load(object sender, EventArgs e)
{
// Record timestamp
base.RecordTimeStamp("Starting long running process");
// Do long running process
Random rnd = new Random();
System.Threading.Thread.Sleep(rnd.Next(1000) + 1000);
if (!IsPostBack)
{
DataTable dt = new DataTable();
dt.Columns.Add("ID");
dt.Columns.Add("Name");
for (int i = 0; i < 20; i++)
{
DataRow dr = dt.NewRow();
dr["ID"] = i;
dr["Name"] = "Name" + i.ToString();
dt.Rows.Add(dr);
dt.AcceptChanges();
}
gv.DataSource = dt;
gv.DataBind();
}
// Record timestamp
base.RecordTimeStamp("Completed long running process");
}
}