具有可选语言URL段的Asp.Net MVC MapRoute

Question

我有一个ASP.Net MVC应用程序，具有以下路由映射：

context.MapRoute("Empty","", new { controller = "Home", action = "Index" });
context.MapRoute("Info","/Info", new { controller = "Info", action = "Index" });
context.MapRoute("Base","/Info/Base", new { controller = "Info", action = "Base" });

我需要将一个语言前缀添加到URL作为段，以便URL看起来像这样：

www.something.com/en
www.something.com/en/Info
www.something.com/en/Info/Base

我通过将一个languageCode参数添加到URL轻松实现它：

context.MapRoute("Empty","/{languageCode}", new { controller = "Home", action = "Index" });
context.MapRoute("Info","/{languageCode}/Info", new { controller = "Info", action = "Index" });
context.MapRoute("Base","/{languageCode}/Info/Base", new { controller = "Info", action = "Base" });

不幸的是，这个参数应该是可选的。但是当我在这些路线下的URL中错过它时 - 我有404错误。

有什么想法如何实现呢？添加languageCode = UrlParameter.Optional没有帮助，只有当可选参数是尾随URL时才有效。

Answer 1

添加两个路由配置（使用和不使用languageCode），您将获得所需的行为

context.MapRoute("Empty","/{languageCode}", new { controller = "Home", action = "Index" });
context.MapRoute("Info","/{languageCode}/Info", new { controller = "Info", action = "Index" });
context.MapRoute("Base","/{languageCode}/Info/Base", new { controller = "Info", action = "Base" });
context.MapRoute("Empty","", new { controller = "Home", action = "Index" });
context.MapRoute("Info","/Info", new { controller = "Info", action = "Index" });
context.MapRoute("Base","/Info/Base", new { controller = "Info", action = "Base" });

注意

以下配置与您的配置相同，但包含较少的配置代码（但它也会公开所有其他控制器）

routes.MapRoute(
    name: "LanguageCode",
    url: "{languageCode}/{controller}/{action}",
    defaults: new { controller = "Home", action = "Index" }
);

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