The route template separator character '/' cannot appear consecutively - Attribute routing issue

Question

The configuration has nothing to do with the error

This is my configuration for the Web API in App_Start/WebApiConfig.cs:

public static void Register(H         


        

Answer 1

I was receiving this issue with a combination of a [RoutePrefix] and a [Route] on an action.

[RoutePrefix("/api/my/application")]

on the action I had

[HttpPost, Route("{someVariable:int}"]

When I changed: [RoutePrefix("/api/my/application")]to[RoutePrefix("api/my/application")] everything was fine.

Answer 2

I've got the same error with two (or more) slashes.

[Route("marketdata//tickerinfo")]

It's easy to happen when you change the string.

Answer 3

The reason for the above error is that I am using an additional '/' in the route attribute for the action. The action defined in the above controller should be as follows:

    [HttpGet]
    [Route("marketdata/tickerinfo")]
    public IHttpActionResult TickerInfo(string currencyPair)
    {

Answer 4

I got the same error however it was caused by the ActionName attribute in my case.

[ActionName("")]
public void Get(string code)

Although this broke the Help pages I was still able to reach the endpoint api/controller?code=123. When I removed the ActionName attribute the error disappeared.