具有多个可选参数的asp.net mvc路由不起作用

我写了一个属性route Route("Home/{category?}/{Subcategory?}/List")想要匹配以下示例/Home/C1/S1/List ，/Home/C1/List ，/Home/List

I wrote a attribute route Route("Home/{category?}/{Subcategory?}/List") want to match the following examples /Home/C1/S1/List, /Home/C1/List, /Home/List

但是仅为了匹配第一个URL，可选参数不起作用.如何使用匹配上述三个示例的路由规则?

But only to match the first url, the optional parameter did not work. How to use a routing rule matches the above three examples?

public class HomeController : Controller
{
    public IActionResult Index()
    {
        return View();
    }

    [Route("Home/{category?}/{subcategory?}/List")]
    public IActionResult List(Category? category = null, SubCategory? subcategory = null)
    {
        return Content(category.ToString() + "/" + subcategory.ToString());
    }

    [Route("Home/{code}/Detail")]
    public IActionResult Detail(string code)
    {
        return Content(code);
    }
}


public enum Category
{
    C1,
    C2,
    C3,
    C4
}

public enum SubCategory
{
    S1,
    S2,
    S3,
    S4
}

类似问题

在ASP.NET MVC 5中路由可选参数

具有一个固定的MVC路由动作和具有多个可选参数的控制器