在ASP.NET Webforms .NET 4.0中路由-GetVirtualPath返回null

Question

我在名為RouteConfig的靜態類中有以下代碼，由App_Start調用：

// Create routes with default values for parameters

routes.MapPageRoute(
"SearchResultsRoute",
"SearchResults/{delegatesurname}/{starsid}/{dealercode}/{leadassessorid}/{locationid} /{datefrom}/{dateto}/{statusid}",
"~/SearchResults.aspx",
false,
new RouteValueDictionary
{
    {"delegatesurname", string.Empty},
    {"starsid", string.Empty},
    {"dealercode", string.Empty},
    {"leadassessorid", 0},
    {"locationid", 0},
    {"datefrom", string.Empty},
    {"dateto", string.Empty},
    {"statusid", 0}
}
);

// EnableFriendlyUrls() is removed, as that was blocking the routing for some reason.

我還有一個名為“ Navigator”的類，其中包含構建URL的方法：

protected string GetUrlFromRouteAndParams(string routeName, IDictionary<string,object> parameters)
{
    var routeDict = new RouteValueDictionary(parameters);
    var q = RouteTable.Routes.GetVirtualPath(null, routeName, routeDict);
    return ""; // ignore this line its not pertinent to question
}

現在，當我調用上面的GetUrlFromRouteAndParams時，如下所示：

    var pageParams = new Dictionary<string, object>()
    {
        {"delegatesurname", _view.DelegateSurname}                
        {"starsid", _view.STARSID},
        {"dealercode", _view.DealerCode},
        {"leadassessorid", _view.LeadAssessorID},
        {"locationid", _view.LocationID},
        {"datefrom", string.Empty },
        {"dateto", string.Empty},
        {"statusid", 0} 
    };

    var url = navigator.GetUrlFromRouteAndParams("SearchResultsRoute", pageParams);

上面的GetUrlFromRouteAndParams中的GetVirtualPath調用返回null。

為什么是這樣？ 我該如何解決？

提前致謝。

Answer 1

嘗試這個

//var routeDict = new RouteValueDictionary(parameters);
var q = RouteTable.Routes.GetVirtualPath(null, routeName, null).VirtualPath;
return q.ToString();