All ASP.NET Web API controllers return 404

Question

I\'m trying to get an API Controller to work inside an ASP.NET MVC 4 web app. However, every request results in a 404 and I\'m stumped. :/

I have th

Answer 1

I had this problem: My Web API 2 project on .NET 4.7.2 was working as expected, then I changed the project properties to use a Specific Page path under the Web tab. When I ran it every time since, it was giving me a 404 error - it didn't even hit the controller.

Solution: I found the .vs hidden folder in my parent directory of my VS solution file (sometimes the same directory), and deleted it. When I opened my VS solution once more, cleaned it, and rebuilt it with the Rebuild option, it ran again. There was a problem with the cached files created by Visual Studio. When these were deleted, and the solution was rebuilt, the files were recreated.