带有可选语言 URL 段的 Asp.Net MVC MapRoute

Question

我有一个带有以下路由映射的 ASP.Net MVC 应用程序：

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" });

我需要为 URL 添加一个语言前缀作为段，以便 URL 看起来像这样：

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

我很容易通过将 languageCode 参数添加到 URL 来实现它：

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" });

幸运的是，这个参数应该是可选的。但是当我在这些路由下的 URL 中错过它时 - 我有 404 错误。

任何想法如何实现它？添加 languageCode = UrlParameter.Optional 没有帮助，仅当可选参数是尾随 URL 时才有效。

Answer 1

添加两个路由配置（有和没有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

以下配置与你的相同，但包含的配置代码更少（但它也会暴露所有其他控制器）

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" }
);