带有可选参数的 ASP.NET MVC 自定义路由

Question

我想要一个带有两个可选参数的路线；我认为以下内容可行：

routes.MapRoute(
    "ProductForm",
    "products/{action}/{vendor_id}_{category_id}",
    new { controller = "Products", action = "Index", vendor_id = "", category_id = "" },
    new { action = @"Create|Edit" }
);

但只有在同时提供 vendor_id 和 category_id 时才有效；使用 RouteDebug 我发现 /products/create/_3 没有触发我的路线，因此我添加了其他两条路线：

routes.MapRoute(
    "ProductForm1",
    "{controller}/{action}/_{category_id}",
    new { controller = "Home", action = "Index", category_id = "" },
    new { controller = "Products", action = @"Create|Edit" }
);

routes.MapRoute(
    "ProductForm2",
    "{controller}/{action}/{vendor_id}_",
    new { controller = "Home", action = "Index", vendor_id = "" },
    new { controller = "Products", action = @"Create|Edit" }
);

所以，问题：

• 正在使用三个路由是创建具有可选参数的路由的唯一方法吗？

• 这些 URL 是否可以，也就是说，您是否会建议一个更好的方法来执行此操作？

  这些

Answer 1

你为什么不尝试给vendor_id一个默认值（如果没有指定，即0），这将帮助你摆脱一条路线

routes.MapRoute("ProductForm","products/{action}/{vendor_id}_{category_id}",
new { controller = "Products", action = "Index", vendor_id = "0", category_id = "" },   
new { action = @"Create|Edit" });

Answer 2

对我来说看起来不错，但我会做一些不同的

routes.MapRoute(
"ProductForm1",
"product/category/{category_id}",
new { controller = "Home", action = "Index", category_id = "" },
new { controller = "Products", action = @"Create|Edit" }

:);

进而

 routes.MapRoute(
"ProductForm1",
"product/details/{product_id}",
new { controller = "Home", action = "Index", product_id = "" },
new { controller = "Products", action = @"Create|Edit" }

）;

那么你的课程可以如下：

ActionResults Index(){}
ActionResults Index(int category_id){// get categories}
ActionResults Index(int product_id){ // get products}

但这就是我

Answer 3

你可以这样尝试：

routes.MapRoute(    
"ProductForm",
"products/{action}/{arg1}/{arg1_id}/{arg2}/{arg2_id}",    
new { controller = "Products", action = "Index", arg1 = "", arg2 = "", arg1_id = "", arg2_id = "" },
new { action = @"Create|Edit" });

然后你会在你的actionresult方法中创建一些逻辑来检查arg1和arg2并识别已传入的参数。

你的actionlink url将如下所示：

/products/create/vendor/10
/products/create/category/20
/products/create/vendor/10/category/20
/products/create/category/20/vendor/10

就我个人而言，我不喜欢这样，因为路由不看起来很干净，但应该给你我认为你想要实现的目标？