Custom VirtualPathProvider

   1: using System;

   2: using System.Web;

   3: using System.Web.Util;

   4: using System.Web.Hosting;

   5:  

   6: public class SimpleVPP : VirtualPathProvider {

   7:     public static void AppInitialize() {

   8:         HostingEnvironment.RegisterVirtualPathProvider(new SimpleVPP());

   9:     }

  10:  

  11:     public override string CombineVirtualPaths(string basePath, string relativePath) {

  12:  

  13:         // If the path is relative, let normal processing happen

  14:         if (!VirtualPathUtility.IsAbsolute(relativePath))

  15:             return base.CombineVirtualPaths(basePath, relativePath);

  16:         

  17:         // Determine the pseudo site from the request.  To demonstrate, we just get it from the

  18:         // query string, but it could come from other places, like the http host header

  19:         string site = HttpContext.Current.Request.QueryString["site"];

  20:  

  21:         // If we couldn't, default to normal processing

  22:         if (site == null)

  23:             return base.CombineVirtualPaths(basePath, relativePath);

  24:  

  25:         // Make it app relative (i.e. ~/...)

  26:         relativePath = VirtualPathUtility.ToAppRelative(relativePath);

  27:  

  28:         // Remap the virtual path to be inside the correct pseudo site

  29:         return "~/PseudoSites/" + site + relativePath.Substring(1);

  30:     }

  31: } 

 

application_start或httpModule里注册再用, 也不是特好用, 但总比其他折腾来的方便多了...

还是Routing好...