Ensure that HttpConfiguration.EnsureInitialized()

Question

I\'ve installed Visual Studio 2013 and when I run my app I get the error below.

I\'ve got no idea as to where I\'m to initialized this object.

What to do?

Answer 1

I actually got this error when I was using Attribute Routing within my WebApi.

I had

[Route("webapi/siteTypes/{siteTypeId"]

instead of

[Route("webapi/siteTypes/{siteTypeId}"]

for my route and got this error. I had simply missed out the closing curly bracket. Once I added it back in, this error didn't occur again.

Answer 2

See @gentiane's answer below for the correct way to handle this now.

At the end of the Application_Start method in Global.Asax.cs try adding:-

GlobalConfiguration.Configuration.EnsureInitialized(); 

Answer 3

In my case I created the webservice in project A and started it from Project B and I got exactly this error. The problem was that some .dll-files which are required by A where missing in the build-output-folder of B. Ensure that these .dll-files are available fixed it.

Answer 4

Although the above answer works if incase that is not set, In my case this stuff was set already. What was different was that, for one of the APIs I had written, I had prefixed the route with a / . Example

[Route("/api/abc/{client}")] 

.Changing this to

[Route("api/abc/{client}")]

fixed it for me

Answer 5

Call

GlobalConfiguration.Configuration.MapHttpAttributeRoutes();

before

GlobalConfiguration.Configure(c => ...);

completes its execution.

Answer 6

I got this error when the version of Newtonsoft.Json was different in my main project compared to the helper project