空参数

Question

我有以下途径一个.NET MVC .NET MVC自定义路由：

routes.Add(new Route(
      "Lookups/{searchtype}/{inputtype}/{firstname}/{middlename}/{lastname}/{city}/{state}/{address}", 
      new RouteValueDictionary(new { controller = "Lookups", action = "Search", firstname = (string)null, middlename = (string)null, lastname = (string)null, city = (string)null, state = (string)null, address = (string)null, SearchType = SearchType.PeopleSearch, InputType = InputType.Name }), 
      new MvcRouteHandler()) 
     ); 

     routes.Add(new Route(
      "Lookups/{searchtype}/{inputtype}", 
      new RouteValueDictionary(new { controller = "Lookups", action = "Search", firstname = "", middlename = "", lastname = "", city = "", state = "", address = "" }), 
      new MvcRouteHandler()) 
     ); 

     routes.Add(new Route(
      "Lookups/{searchtype}/{inputtype}", 
      new RouteValueDictionary(new { controller = "Lookups", action = "Search", firstname = "", middlename = "", lastname = "", city = "", state = "", address = "", SearchType = SearchType.PeopleSearch, InputType = InputType.Name }), 
      new MvcRouteHandler()) 
     ); 

     routes.MapRoute(
      "Default",            // Route name 
      "{controller}/{action}/{id}",       // URL with parameters 
      new { controller = "Account", action = "LogOn", id = "" } // Parameter defaults 
     ); 

以下要求正常工作：

http://localhost:2608/Lookups/PeopleSearch/Name/john/w/smith/seattle/wa/123主要

这个请求不起作用：

http://localhost:2608/Lookups/PeopleSearch/Name/john//smith//wa/

不是所有的请求都会有所有参数，我希望空参数作为空字符串或null传递给方法。

我哪里错了？

的方法：

public ActionResult Search(string firstname, string middlename, string lastname, string city, string state, string address, SearchType searchtype, InputType inputtype) 
    { 
     SearchRequest r = new SearchRequest { Firstname = firstname, Middlename = middlename, Lastname = lastname, City = city, State = state, Address = address, SearchType = searchtype, InputType = inputtype }; 
     return View(r); 
    } 

Answer 1

我看到一个问题，你的第二个和第三个路径具有完全相同的URL参数。所以第三条路线永远不会被调用。你为什么在那里？看起来你可以简单地删除第二条路线。

此外，第二条路线的参数比第一条路线少。这意味着第一条路线可能会匹配您发布的两个网址。您应该重新排列这些路线。

更新：哦！我没有注意到URL中的双斜线。那永远不会工作。就ASP.NET而言，它不是一个有效的URL，因此即使在请求路由之前，ASP.NET也会阻止该请求。