老赵同学写过 在Web应用程序开发过程中利用ASP.NET MVC框架的实战技巧 ，Routing现在可以作为URLRewriting技术的替代者，出现在asp.net mvc框架中，将它应用于WebForms上也是很简单的，可以到codeplex上下载ASP.NET MVC WebFormRouting Demo 。
实现的原理也是很简单的：
1、创建一个自定义的实例化你的页面的 IRouteHandler
1: public class WebFormRouteHandler : IRouteHandler {
2:
public
WebFormRouteHandler(string
virtualPath) 3:
: this
(virtualPath, true
) { 4:
} 5:
6:
public
WebFormRouteHandler(string
virtualPath, bool
checkPhysicalUrlAccess) { 7:
if
(virtualPath == null
) { 8:
throw
new
ArgumentNullException("virtualPath"
); 9:
} 10:
11:
if
(!virtualPath.StartsWith("~/"
)) { 12:
throw
new
ArgumentException("virtualPath must start with a tilde slash: \"~/\""
, "virtualPath"
); 13:
} 14:
15:
this
.VirtualPath = virtualPath; 16:
this
.CheckPhysicalUrlAccess = checkPhysicalUrlAccess; 17:
} 18:
19:
/// <summary>
20:
/// This is the full virtual path (using tilde syntax) to the WebForm page.
21:
/// </summary>
22:
/// <remarks>
23:
/// Needs to be thread safe so this is only settable via ctor.
24:
/// </remarks>
25:
public
string
VirtualPath { get; private
set; } 26:
27:
/// <summary>
28:
/// Because we're not actually rewriting the URL, ASP.NET's URL Auth will apply
29:
/// to the incoming request URL and not the URL of the physical WebForm page.
30:
/// Setting this to true (default) will apply URL access rules against the
31:
/// physical file.
32:
/// </summary>
33:
/// <value>True by default</value>
34:
public
bool
CheckPhysicalUrlAccess { get; set; } 35:
36:
public
IHttpHandler GetHttpHandler(RequestContext requestContext) { 37:
string
virtualPath = GetSubstitutedVirtualPath(requestContext); 38:
if
(this
.CheckPhysicalUrlAccess && !UrlAuthorizationModule.CheckUrlAccessForPrincipal(virtualPath, requestContext.HttpContext.User, requestContext.HttpContext.Request.HttpMethod)) 39:
throw
new
SecurityException(); 40:
41:
var page = BuildManager.CreateInstanceFromVirtualPath(virtualPath, typeof
(Page)) as
IHttpHandler; 42:
if
(page != null
) { 43:
//Pages that don't implement IRoutablePage won't have the RequestContext
44:
//available to them. Can't generate outgoing routing URLs without that context.
45:
var routablePage = page as
IRoutablePage; 46:
if
(routablePage != null
) 47:
routablePage.RequestContext = requestContext; 48:
} 49:
return
page; 50:
} 51:
52:
/// <summary>
53:
/// Gets the virtual path to the resource after applying substitutions based on route data.
54:
/// </summary>
55:
/// <param name="requestContext"></param>
56:
/// <returns></returns>
57:
public
string
GetSubstitutedVirtualPath(RequestContext requestContext) { 58:
if
(!VirtualPath.Contains("{"
)) 59:
return
VirtualPath; 60:
61:
//Trim off ~/
62:
string
virtualPath = VirtualPath.Substring(2); 63:
64:
Route route = new
Route(virtualPath, this
); 65:
VirtualPathData vpd = route.GetVirtualPath(requestContext, requestContext.RouteData.Values); 66:
if
(vpd == null
) 67:
return
VirtualPath; 68:
return
"~/"
+ vpd.VirtualPath; 69:
} 70:
}2、使用自定义的 IRouteHandler注册一个新的Routes
1:
public
class
Global : System.Web.HttpApplication 2:
{ 3:
4:
protected
void
Application_Start(object
sender, EventArgs e) 5:
{ 6:
RegisterRoutes(RouteTable.Routes); 7:
} 8:
9:
public
static
void
RegisterRoutes(RouteCollection routes) 10:
{ 11:
//We are intentionally creating this backdoor as a demonstration of
12:
//bad security practices.
13:
routes.MapWebFormRoute("Secret"
, "BackDoor"
, "~/Admin/SecretPage.aspx"
, false
); 14:
routes.MapWebFormRoute("Blocked"
, "FrontDoor"
, "~/Admin/SecretPage.aspx"
, true
); 15:
16:
//Even though we are not checking physical url access in this route, it should still block because the incoming
17:
//request url would start with /Admin.
18:
routes.MapWebFormRoute("Admin"
, "Admin/{*anything}"
, "~/Admin/SecretPage.aspx"
, false
); 19:
20:
routes.MapWebFormRoute("Named"
, "foo/bar"
, "~/forms/blech.aspx"
); 21:
routes.MapWebFormRoute("Numbers"
, "one/two/three"
, "~/forms/haha.aspx"
); 22:
23:
//Maps any requests for /haha/*.aspx to /forms/hahah.aspx
24:
routes.MapWebFormRoute("Substitution"
, "haha/{filename}"
, "~/forms/haha.aspx"
); 25:
} 26:
}相关文章:
<span id="ctl00_ArticleTopHeader_ArticleTitle" class="ArticleTopTitle">Fight 404 errors with ASP.NET Routing :<a href="http://www.codeproject.com/KB/aspnet/routing404.aspx">http://www.codeproject.com/KB/aspnet/routing404.aspx</a></span>
msdn杂志文章：
使用 ASP.NET Web 窗体路由：http://msdn.microsoft.com/zh-cn/magazine/2009.01.extremeaspnet.aspx
本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/dz45693/archive/2009/12/22/5058018.aspx
