>

public WebFormRouteHandler(string virtualPath, bool checkPhysicalUrlAccess, Func custom)

然后在类中，我将自定义参数存储到私有 CustomVirtualPath 属性中.要使用它，我必须将 GetSubstitutedVirtualPath 更改为:

public string GetSubstitutedVirtualPath(RequestContext requestContext){字符串路径 = VirtualPath;if (CustomVirtualPath != null){路径 = CustomVirtualPath(requestContext);}if (!path.Contains("{")) 返回路径；//修剪掉~/string virtualPath = path.Substring(2);Route route = new Route(virtualPath, this);VirtualPathData vpd = route.GetVirtualPath(requestContext, requestContext.RouteData.Values);if (vpd == null) 返回路径；返回 "~/" + vpd.VirtualPath;}

为了编译项目，我们需要更改 WebFormRoute 和 WebFormRouteExtensions 以允许自定义参数沿链向下传递.完成后我可以在 global.asax.cs 中写这个

routes.MapWebFormRoute("All", "{any}.aspx", "~/", false,上下文 =>{return ((string)context.RouteData.Values["any"] == "test"?~/PageProcessor.aspx": "~/DifferentPageProcessor.aspx");});

当然，lambda 表达式的主体应该从其他地方(数据库或缓存)查找 URL.

I'm using Phil Haack's URL routing for WebForms and I would like to define a route that's "dynamic." Let's say I have this route:

"{any}.aspx" -- goes to --> "~/PageProcessor.aspx"

This would take any request that's not a physical page to the PageProcessor page. This works great. The problem is that, based on some data that comes from a database, I need certain pages to be routed to a different processor, let's say DifferentPageProcessor.aspx. I can't define a new route that catches all the .aspx files because the first one catches everything.

So, I would need a way to process the request before the "router" decides to take it to PageProcessor and fork it to either PageProcessor or DifferentPageProcessor as needed. Is this possible?

Thanks.

My solution -- unless somebody comes up with a more elegant one -- was to modify the WebFormRouteHandler class in the WebFormRouting project to accept a custom predicate.

public WebFormRouteHandler(string virtualPath, bool checkPhysicalUrlAccess, Func<RequestContext, string> custom)

Then inside the class I would store the custom parameter into private CustomVirtualPath property. To use it, I had to change GetSubstitutedVirtualPath to this:

public string GetSubstitutedVirtualPath(RequestContext requestContext)
{
  string path = VirtualPath;

  if (CustomVirtualPath != null)
  {
    path = CustomVirtualPath(requestContext);
  }

  if (!path.Contains("{")) return path;

  //Trim off ~/
  string virtualPath = path.Substring(2);

  Route route = new Route(virtualPath, this);
  VirtualPathData vpd = route.GetVirtualPath(requestContext, requestContext.RouteData.Values);
  if (vpd == null) return path;
  return "~/" + vpd.VirtualPath;
}

For the project to compile we need to change WebFormRoute and WebFormRouteExtensions to allow the passing of the custom parameter down the chain. When all done I can write this in global.asax.cs

routes.MapWebFormRoute("All", "{any}.aspx", "~/", false,
                         context =>
                           {
                             return ((string)context.RouteData.Values["any"] == "test"
                                       ? "~/PageProcessor.aspx"
                                       : "~/DifferentPageProcessor.aspx");
                           });

Of course the body of the lambda expression should look up the URL from some other place (database or cache).

这篇关于WebForms 自定义/动态路由的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持编程学习网！