ASP.NET MVC MapRoute超过1个参数问题

Posted 2021-04-24

我正在尝试使用带有多个参数的MapRoute，但它无法正常工作。

我的RegisterRoutes：

public static void RegisterRoutes(RouteCollection routes)
{
    routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

    routes.MapRoute(
        name: "Default",
        url: "{controller}/{action}/{id}",
        defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
    );
    routes.MapRoute(
        "TestRoute",                                              // Route name
        "{controller}/{action}/{id}/{tID}",                           // URL with parameters
        new { controller = "Test", action = "Index", id = "", tID = "" }  // Parameter defaults
    );
}

我的测试控制器：

public class TestController : Controller
{
    public ActionResult Index(int? id, int? tID)
    {
        // Some code to create viewModel

        return View(viewModel);
    }
}

我从html.ActionLink称这个方法：

@Html.ActionLink(@item.Description, "Index", "Test", 
    new { id = @item.CatID, tID = @item.myTID }, null)

但是，它返回的URL为：/Test/Index/3?tID=264981而不是/Test/Index/3/264981

有人知道我做错了什么吗？

答案

这里有几个问题：

1. 应在一般路线之前先注册更具体的路线。
2. 由于第一场比赛总是胜利，因此需要以某种方式约束路线。例如，保持在路由B之前注册的路由A匹配应由路由B处理的情况。
3. 最符合逻辑的行为通常是使所需的路由值，而不是可选的。

public static void RegisterRoutes(RouteCollection routes)
{
    routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

    // Register the most specific route first
    routes.MapRoute(
        "TestRoute",

        // Constrain the URL - the simplest way is just to add a literal
        // segment like this, but you could make a route constraint instead.
        "Test/{action}/{id}/{tID}", 

        // Don't set a value for id or tID to make these route values required.
        // If it makes sense to use /Test/Action without any additional segments,
        // then setting defaults is okay.
        new { controller = "Test", action = "Index" }  
    );

    routes.MapRoute(
        name: "Default",
        url: "{controller}/{action}/{id}",
        defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
    );
}

参考：Why map special routes first before common routes in asp.net mvc?