HttpModule类(URL重写)

 using System; using System.Diagnostics; using System.Threading; using System.Web; using System.Xml; using System.Text.RegularExpressions; namespace UrlWriter { /// <summary> /// HttpModule类(URL重写) /// </summary> public class HttpModule : System.Web.IHttpModule { //public readonly static Mutex m=new Mutex(); /// <summary> /// 实现接口的Init方法 /// </summary> /// <param name="context"></param> public void Init( HttpApplication context ) { context.BeginRequest += new EventHandler( ReUrl_BeginRequest ); } public void Application_OnError( Object sender, EventArgs e ) { } /// <summary> /// 实现接口的Dispose方法 /// </summary> public void Dispose() { } /// <summary> /// 重写Url,待优化 /// </summary> /// <param name="sender">事件的源</param> /// <param name="e">包含事件数据的 EventArgs</param> private void ReUrl_BeginRequest( object sender, EventArgs e ) { //重写后的url如果有多级目录，最好将页面上的所有图片调用、css调用都做成绝对路径 HttpContext context = ( ( HttpApplication )sender ).Context; //string forumPath = ""; string requestPath = context.Request.Path.ToLower(); //遍历每个url重写规则 //string strTemplateid = ""; foreach ( SiteUrls.URLRewrite url in SiteUrls.GetSiteUrls().Urls ) { if ( Regex.IsMatch( requestPath, url.Pattern, RegexOptions.Compiled | RegexOptions.IgnoreCase ) ) { //实际地址 //string newUrl = Regex.Replace(requestPath.Substring(context.Request.Path.LastIndexOf("/")), url.Pattern, url.QueryString, RegexOptions.Compiled | RegexOptions.IgnoreCase); string newUrl = Regex.Replace( context.Request.Path, url.Pattern, url.QueryString, RegexOptions.Compiled | RegexOptions.IgnoreCase ); //HttpContext.Current.Response.Write(context.Request.Path + "<br/>" + url.Pattern + "<br/>" + url.QueryString + "<br/>"); //HttpContext.Current.Response.Write(url.Page + "<br/>" + newUrl); //HttpContext.Current.Response.End(); context.RewritePath( "/" + url.Page, string.Empty, newUrl ); return; } } //没有对应的重写规则，不重写 context.RewritePath( "/" + requestPath ); //--// } } /// <summary> /// 站点伪Url信息类 /// </summary> public class SiteUrls { #region 内部属性和方法 private static object lockHelper = new object(); private static volatile SiteUrls instance = null; string SiteUrlsFile = HttpContext.Current.Server.MapPath( "~/xml/urls.config" ); private System.Collections.ArrayList _Urls; public System.Collections.ArrayList Urls { get { return _Urls; } set { _Urls = value; } } private System.Collections.Specialized.NameValueCollection _Paths; public System.Collections.Specialized.NameValueCollection Paths { get { return _Paths; } set { _Paths = value; } } private SiteUrls() { Urls = new System.Collections.ArrayList(); Paths = new System.Collections.Specialized.NameValueCollection(); XmlDocument xml = new XmlDocument(); xml.Load( SiteUrlsFile ); XmlNode root = xml.SelectSingleNode( "urls" ); foreach ( XmlNode n in root.ChildNodes ) { if ( n.NodeType != XmlNodeType.Comment && n.Name.ToLower() == "rewrite" ) { XmlAttribute name = n.Attributes["name"]; XmlAttribute path = n.Attributes["path"]; XmlAttribute page = n.Attributes["page"]; XmlAttribute querystring = n.Attributes["querystring"]; XmlAttribute pattern = n.Attributes["pattern"]; if ( name != null && path != null && page != null && querystring != null && pattern != null ) { Paths.Add( name.Value, path.Value ); Urls.Add( new URLRewrite( name.Value, pattern.Value, page.Value.Replace( "^", "&" ), querystring.Value.Replace( "^", "&" ) ) ); } } } } #endregion public static SiteUrls GetSiteUrls() { if ( instance == null ) { lock ( lockHelper ) { if ( instance == null ) { instance = new SiteUrls(); } } } return instance; } public static void SetInstance( SiteUrls anInstance ) { if ( anInstance != null ) instance = anInstance; } public static void SetInstance() { SetInstance( new SiteUrls() ); } /// <summary> /// 重写伪地址 /// </summary> public class URLRewrite { #region 成员变量 private string _Name; public string Name { get { return _Name; } set { _Name = value; } } private string _Pattern; public string Pattern { get { return _Pattern; } set { _Pattern = value; } } private string _Page; public string Page { get { return _Page; } set { _Page = value; } } private string _QueryString; public string QueryString { get { return _QueryString; } set { _QueryString = value; } } #endregion #region 构造函数 public URLRewrite( string name, string pattern, string page, string querystring ) { _Name = name; _Pattern = pattern; _Page = page; _QueryString = querystring; } #endregion } } }

规则：

XML code

<?xml version="1.0" encoding="utf-8" ?>
<urls>
  <rewrite name="rss"
       path="/rss-{0}.aspx"
       pattern = "/rss(-(/d+))?.aspx"
       page="/rss.aspx"
       querystring="ID=$2" />
</urls> 

Web.config文件里还得做点修改，这个你自己到网上查查吧...
没有编译前，可以参考下面的语法
     <httpModules>
       <add type="UrlWriter.HttpModule" name="HttpModule" />
     </httpModules>