C# – Routing to index with id in ASP.NET MVC 4

asp.netasp.net-mvcasp.net-mvc-routingc

I'd like to maintain ASP.NET MVC 4's existing controller/action/id routing with default controller = Home and default action = Index, but also enable controller/id to route to the controller's index method as long as the second item is not a known action.

For example, given a controller Home with actions Index and Send:

/Home/Send -> controller's Send method
/Home -> controller's Index method
/Home/Send/xyz -> controller's Send method with id = xyz
/Home/abc -> controller's Index method with id = abc

However, if I define either route first, it hides the other one. How would I do this?

Best Answer

Do the specific one first before the default generic one. The order matters.

routes.MapRoute(name: "single", url: "{controller}/{id}",
    defaults: new { controller = "Home", action = "Index" }, 
    constraints: new { id = @"^[0-9]+$" });

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

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ASP.NET Compiler Post-Build Step

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<Project ToolsVersion="3.5" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
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You can update projects that were created with previous releases of MVC to include build-time validation of views by performing the following steps:

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For MVC v5.1 use Html.EnumDropDownListFor

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For MVC 5 and lower

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namespace MyApp.Common
{
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This allows you to write:

ViewData["taskStatus"] = task.Status.ToSelectList();

by using MyApp.Common