Question

This is my code:

1 HttpClient client = new HttpClient();
2 client.BaseAddress = new Uri("http://localhost/");
3 HttpResponseMessage message = client.GetAsync("api/MyAPI").Result;
4 IEnumerable<string> supplies = 
                 message.Content.ReadAsAsync<IEnumerable<string>>().Result;
5 return View(supplies);

And the error occurs on line 3 Error:404

But When I use Visual Studio 2010 development server, no errors occur.

Answer 1

Essentially you have to take care of the cases yourself here.

For development the path to your API is :

http://localhost/api/MyAPI

And for production on IIS it is:

http://localhost/WebAPITest/api/MyAPI

The simplest way, which is what we do in fact at my company, is, put the base path into a configuration (Application Settings maybe) and then do this:

Settings.BaseUrl = "http://localhost/";
client.BaseAddress = new Uri(Settings.BaseUrl);

When you deploy to IIS change Settings.BaseUrl to http://localhost/WebAPITest/.

Ideally you could also drop the VS development server and debug on IIS. (This requires VS running with administrator rights)