[c#] Multiple HttpPost method in Web API controller

You can have multiple actions in a single controller.

For that you have to do the following two things.

  • First decorate actions with ActionName attribute like

     [ActionName("route")]
     public class VTRoutingController : ApiController
     {
       [ActionName("route")]
       public MyResult PostRoute(MyRequestTemplate routingRequestTemplate)
       {
         return null;
       }
    
      [ActionName("tspRoute")]
      public MyResult PostTSPRoute(MyRequestTemplate routingRequestTemplate)
      {
         return null;
      }
    }
    
  • Second define the following routes in WebApiConfig file.

    // Controller Only
    // To handle routes like `/api/VTRouting`
    config.Routes.MapHttpRoute(
        name: "ControllerOnly",
        routeTemplate: "api/{controller}"               
    );
    
    
    // Controller with ID
    // To handle routes like `/api/VTRouting/1`
    config.Routes.MapHttpRoute(
        name: "ControllerAndId",
        routeTemplate: "api/{controller}/{id}",
        defaults: null,
        constraints: new { id = @"^\d+$" } // Only integers 
    );
    
    // Controllers with Actions
    // To handle routes like `/api/VTRouting/route`
    config.Routes.MapHttpRoute(
        name: "ControllerAndAction",
        routeTemplate: "api/{controller}/{action}"
    );
    

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