//类URLRewriter程序清单： 
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; 
/// <summary> 
/// UrlRewriter URL重写类 
 /// Author:yoyo 
/// </summary> 
public class UrlRewriter : IHttpHandler //实现“IHttpHandler”接口 
{ 
 public UrlRewriter() 
{ 
// 
// TODO: 在此处添加构造函数逻辑 
 // 
} 
public void ProcessRequest(HttpContext Context) 
{ 
try 
{ 
//取得原始URL屏蔽掉参数 
string Url = Context.Request.RawUrl; 
//建立正则表达式 
  System.Text.RegularExpressions.Regex Reg = new System.Text.RegularExpressions.Regex 
  (@"/show-(\d+)-(\d+)\..+",System.Text.RegularExpressions.RegexOptions.IgnoreCase); 
//用正则表达式进行匹配 
System.Text.RegularExpressions.Match m = Reg.Match(Url,Url.LastIndexOf("/"));//从最后一个“/”开始匹配 
if (m.Success)//匹配成功 
{ 
String RealPath = @"~/aspx/show.aspx?type=" + m.Groups[1] + "&id=" + m.Groups[2]; 
//Context.Response.Write(RealPath); 
//Context.RewritePath(RealPath);//(RewritePath 用在无 Cookie 会话状态中。) 
Context.Server.Execute(RealPath); 
} 
else  
{ 
Context.Response.Redirect(Context.Request.Url.ToString()); 
} 
} 
catch 
{ 
Context.Response.Redirect(Context.Request.Url.ToString()); 
} 
} 
/// <summary> 
/// 实现“IHttpHandler”接口所必须的成员 
/// </summary> 
/// <value></value> 
/// Author:yoyo 
public bool IsReusable 
{ 
get { return false; } 
}
}

using System; 
using System.IO; 
using System.Web; 
using System.Web.UI; 
namespace MyURL 
{ 
  public class MyOLPage : Page 
  { 
    public MyOLPage() 
    { } 
    protected override void Render(HtmlTextWriter writer) 
    { 
      if (writer is System.Web.UI.Html32TextWriter) 
      { 
        writer = new FormFixerHtml32TextWriter(writer.InnerWriter); 
      } 
      else 
      { 
        writer = new FormFixerHtmlTextWriter(writer.InnerWriter); 
      } 
      base.Render(writer); 
    } 
  } 
 
  internal class FormFixerHtml32TextWriter : System.Web.UI.Html32TextWriter 
  { 
    private string _url; // 伪装的URL 
    internal FormFixerHtml32TextWriter(TextWriter writer) 
      : base(writer) 
    { 
      _url = HttpContext.Current.Request.RawUrl; 
    } 
    public override void WriteAttribute(string name, string value, bool encode) 
    { 
      if (_url != null && string.Compare(name, "action", true) == 0) 
      { 
        value = _url; 
      } 
      base.WriteAttribute(name, value, encode); 
    } 
  } 
  internal class FormFixerHtmlTextWriter : System.Web.UI.HtmlTextWriter 
  { 
    private string _url; 
    internal FormFixerHtmlTextWriter(TextWriter writer) 
      : base(writer) 
    { 
      _url = HttpContext.Current.Request.RawUrl; 
    } 
    public override void WriteAttribute(string name, string value, bool encode) 
    { 
      if (_url != null && string.Compare(name, "action", true) == 0) 
      { 
        value = _url; 
      } 
      base.WriteAttribute(name, value, encode); 
    } 
  } 
} 

<?xml version="1.0"?> 
<configuration> 
 <configSections> 
  <section name="RewriterConfig" type="URLRewriter.Config.RewriterConfigSerializerSectionHandler, URLRewriter" /> 
 </configSections> 
 
 <RewriterConfig> 
    <Rules> 
      <RewriterRule> 
        <LookFor>~/web/new/type/(.[0-9]*)\.html</LookFor> 
    <SendTo>~/web/new.aspx?id=$1</SendTo> 
      </RewriterRule> 
   <RewriterRule> 
    <LookFor>~/web/index.html</LookFor> 
    <SendTo>~/web/index.aspx</SendTo> 
   </RewriterRule> 
    </Rules> 
  </RewriterConfig> 
  <system.web> 
  <httpHandlers> 
   <add verb="*" path="*.aspx" type="URLRewriter.RewriterFactoryHandler, URLRewriter" /> 
   <add verb="*" path="*.html" type="URLRewriter.RewriterFactoryHandler, URLRewriter" /> 
  </httpHandlers> 
    <compilation debug="true"/></system.web> 
</configuration> 

<RewriterConfig> 
  <Rules> 
  <RewriterRule> 
   <LookFor>要查找的模式</LookFor> 
   <SendTo>要用来替换模式的字符串</SendTo> 
  </RewriterRule> 
  <RewriterRule> 
   <LookFor>要查找的模式</LookFor> 
   <SendTo>要用来替换模式的字符串</SendTo> 
  </RewriterRule> 
  </Rules> 
</RewriterConfig>