Many times we need to show how long a page took to process. One way is to hook up a IHttpModule to the asp.net application, and measuse the time between the Begin and the End request.
In the BeginRequest we will set a local variable -spanIni - with the DateTime.Now value.
When the page finish all its process, it fires the EndRequest, and we then create a time span with the diference between the spanIni and the DateTime.Now value. This is the time it took to process the page.
using System;using System.Globalization;using System.Web;namespace CreativeMinds.Web{ public class RequestTime : IHttpModule { #region IHttpModule Members private DateTime spanIni; private TimeSpan span; ///<summary> ///Initializes a module and prepares it to handle requests. ///</summary> /// ///<param name="context">An <see cref="T:System.Web.HttpApplication"></see>
///that provides access to the methods, properties, and events common to all application
///objects within an ASP.NET application </param> public void Init(HttpApplication context) { context.BeginRequest += new EventHandler(context_BeginRequest); context.EndRequest += new EventHandler(context_EndRequest); } /// <summary> /// Handles the EndRequest event of the context control. /// </summary> /// <param name="sender">The source of the event.</param> /// <param name="e">The <see cref="System.EventArgs"/> instance containing the event data.</param> void context_EndRequest(object sender, EventArgs e) { HttpContext context = HttpContext.Current; if (!context.Request.PhysicalPath.EndsWith(".aspx", StringComparison.OrdinalIgnoreCase)) return; span = DateTime.Now.Subtract(spanIni); int aux = int.Parse(((Int32)span.TotalMilliseconds).ToString(), NumberStyles.Integer); context.Response.Write(string.Format("<script>var __set= new Date({0});</script>", aux)); } /// <summary> /// Handles the BeginRequest event of the context control. /// </summary> /// <param name="sender">The source of the event.</param> /// <param name="e">The <see cref="System.EventArgs"/> instance containing the event data.</param> void context_BeginRequest(object sender, EventArgs e) { HttpContext context = HttpContext.Current; if (!context.Request.PhysicalPath.EndsWith(".aspx", StringComparison.OrdinalIgnoreCase)) return; spanIni = DateTime.Now; } ///<summary> ///Disposes of the resources (other than memory) used by the module that implements
///<see cref="T:System.Web.IHttpModule"></see>. ///</summary> /// public void Dispose() { } #endregion }}
The above code renders to the page a Javascript variable called "__set" that as the time span for the page proccess.
With this you now just need to show it:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="requestTime.aspx.cs" Inherits="requestTime" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" ><head runat="server"> <title>Request Time</title></head><body> <form id="form1" runat="server"> <div> <div id="lblReqTime"></div> </div> </form> <script type="text/javascript"> window.onload = function(){ if (__set) { var el = document.getElementById("lblReqTime"); el.innerText = "Server time: " + __set.getSeconds() + "."
+ __set.getMilliseconds() + " milliseconds."; } } </script></body></html>
For test purpose, lets add a Thread.sleep:
using System;using System.Threading;using System.Web.UI;public partial class requestTime : Page{ protected void Page_Load(object sender, EventArgs e) { Thread.Sleep(1530); }}
Subscribe