我这里只写几个常用的事件
1.OnPreInit:此事件后将加载个性化信息和主题
2.OnInit:初始化页面中服务器控件的默认值但控件的状态没有加载,没有创建控件树
3.OnPreLoad:控件完成状态和回传数据的加载
4.Page_Load:此事件是在OnInit中订阅的
5.Render:呈现最终页面的内容
假设有一个文章数据库
以前都是通过article.aspx?id=123的动态形式访问的
现在我们想要减轻服务器压力,把文章生成静态文件
先看article.aspx的程序
using
System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Text;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.IO; // StringWriter名称空间
namespace _1
{
public partial class article : System.Web.UI.Page
{
protected void Page_Load( object sender, EventArgs e)
{
if ( ! string .IsNullOrEmpty(Request[ " id " ]))
Label1.Text = " 文章内容为： " + Request[ " id " ].ToString();
}
protected override void Render(HtmlTextWriter writer)
{
StringWriter sw = new StringWriter(); // 这个和StringBuilder没太大区别
HtmlTextWriter htmlw = new HtmlTextWriter(sw);
base .Render(htmlw); // 不用传递进来的writer
htmlw.Flush();
htmlw.Close();
string PageContent = sw.ToString();
string path = Server.MapPath( " ~/Article/ " );
string pageurl = xland.MyModule.GetFileName(HttpContext.Current);
using (StreamWriter stringWriter = File.AppendText(path + pageurl))
{
stringWriter.Write(PageContent);
}
Response.Write(PageContent);
}
}
}
using System.Collections;
using System.Configuration;
using System.Data;
using System.Text;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.IO; // StringWriter名称空间
namespace _1
{
public partial class article : System.Web.UI.Page
{
protected void Page_Load( object sender, EventArgs e)
{
if ( ! string .IsNullOrEmpty(Request[ " id " ]))
Label1.Text = " 文章内容为： " + Request[ " id " ].ToString();
}
protected override void Render(HtmlTextWriter writer)
{
StringWriter sw = new StringWriter(); // 这个和StringBuilder没太大区别
HtmlTextWriter htmlw = new HtmlTextWriter(sw);
base .Render(htmlw); // 不用传递进来的writer
htmlw.Flush();
htmlw.Close();
string PageContent = sw.ToString();
string path = Server.MapPath( " ~/Article/ " );
string pageurl = xland.MyModule.GetFileName(HttpContext.Current);
using (StreamWriter stringWriter = File.AppendText(path + pageurl))
{
stringWriter.Write(PageContent);
}
Response.Write(PageContent);
}
}
}
我们还是通过自定义httpModules来实现url重写
webconfig文件没有太大变化
<?
xml version="1.0"
?>
< configuration >
< system.web >
< compilation debug ="true" ></ compilation >
< httpModules >
< add name ="myModule" type ="xland.MyModule" />
</ httpModules >
</ system.web >
</ configuration >
< configuration >
< system.web >
< compilation debug ="true" ></ compilation >
< httpModules >
< add name ="myModule" type ="xland.MyModule" />
</ httpModules >
</ system.web >
</ configuration >
MyModule程序
using
System;
using System.Collections.Generic;
using System.Web; // 引用web命名空间
using System.Text;
using System.IO;
namespace xland
{
public class MyModule:IHttpModule
{
public void Init(HttpApplication context)
{
context.BeginRequest += new EventHandler(context_BeginRequest);
}
public void context_BeginRequest( object sender, EventArgs e)
{
HttpApplication application = (HttpApplication)sender;
HttpContext context = application.Context;
// AppRelativeCurrentExecutionFilePath这里不包括传过来的参数
if (context.Request.AppRelativeCurrentExecutionFilePath.ToLower().EndsWith( " .aspx " ))
{
string fileurl = " ~/article/ " + GetFileName(context);
if (File.Exists(context.Server.MapPath(fileurl)))
{
context.RewritePath(fileurl, false );
}
}
}
public static string GetFileName(HttpContext context)
{
return context.Request.AppRelativeCurrentExecutionFilePath.ToLower().Replace( " .aspx " , "" ).Replace( " ~/ " , "" ) + context.Request.Url.Query.Replace( " ?id= " , " _ " ) + " .html " ;
}
public void Dispose() { }
}
}
using System.Collections.Generic;
using System.Web; // 引用web命名空间
using System.Text;
using System.IO;
namespace xland
{
public class MyModule:IHttpModule
{
public void Init(HttpApplication context)
{
context.BeginRequest += new EventHandler(context_BeginRequest);
}
public void context_BeginRequest( object sender, EventArgs e)
{
HttpApplication application = (HttpApplication)sender;
HttpContext context = application.Context;
// AppRelativeCurrentExecutionFilePath这里不包括传过来的参数
if (context.Request.AppRelativeCurrentExecutionFilePath.ToLower().EndsWith( " .aspx " ))
{
string fileurl = " ~/article/ " + GetFileName(context);
if (File.Exists(context.Server.MapPath(fileurl)))
{
context.RewritePath(fileurl, false );
}
}
}
public static string GetFileName(HttpContext context)
{
return context.Request.AppRelativeCurrentExecutionFilePath.ToLower().Replace( " .aspx " , "" ).Replace( " ~/ " , "" ) + context.Request.Url.Query.Replace( " ?id= " , " _ " ) + " .html " ;
}
public void Dispose() { }
}
}
注释就不多写了,相信大家能看懂
这个示例程序只是为了说明page类的Render事件
如果要用到项目中,请慎重
因为会造成大量的服务器IO
而且这也不是生成静态页面的最佳方案
