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...