CODEWITHSUNDEEP
c#asp.netasp.net-web-api
Ommy
Ommy

Reputation: 43

WebApi 500 Internal Server Error

I am experimenting with WebApi and have created a controller with two methods.

I started with the following method first: 

    [HttpGet]
    [Route("car/{registration}")]
    public object GetCarByRegistration(string registration) {
        return null;
    }

When debugging I put a breakpoint on return null; tested url http://localhost:51245/api/car/yw25jdk which work fine, visual studio stopped at my breakpoint and the registration variable was the same value in the url.

But when I added the following method:

    [HttpGet]
    [Route("car/{serial}")]
    public object GetCarBySerial(string serial) {
        return null;
    }

The first url stopped working and I started to get 500 - Internal Server Error. If I take the second method out then the first method works again.

I cannot understand why the second method breaks the first one.

Can someone explain this to me please?

Upvotes: 4

Views: 5493

Answers (2)

jollyjoyce1995
jollyjoyce1995

Reputation: 321

Well thats because ASP does not know which method to use when you go to the url http://localhost:51245/api/car/yw25jdk since both methods say they expect a string as their parameter.

How should ASP know the difference between /car/{registration} and /car/{serial], since both of them are string?

You should change the Route of on of them, to get it working

Upvotes: 7

stann1
stann1

Reputation: 635

Put this in your WebApiConfig:

 config.MapHttpAttributeRoutes();

Otherwise WebApi ignores the Route attribute. And without the different route signatures, when the ApiController receives a GET request, it automatically looks for the first action that starts with 'Get' - this is why it works when you remove the second method

Upvotes: 0

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