You must call "WebSecurity.InitializeDatabaseConnection" ... But I already have - asp.net-mvc-4

Question

I've read through a number of SO questions on this topic, but all seem to be dealing with where you should put this call.
My problem is different: I have already done the WebSecurity.InitializeDatabaseConnection() call, and have set breakpoints so I know it's been executed. But I still get the invalid operation exception saying I have to call it.
Unlike most of the other questions which are encoutering it in an MVC controller action, I'm encountering it an HttpModule I have written to accomplish Authentication for a REST WebAPI controller. The Init call contains the WebSecurity.InitializeDatabaseConnection call. The OnAuthenticationRequest method then extracts username and password information from the request's Authorization header, and calls the ValidateUser method of the SimpleMembershipProvider. This is where I get the exception
You must call the WebSecurity.InitializeDatabaseConnection method
before you call any other method of theWebSecurityclass.
So
a) why am I getting this exception when I have already fulfilled the conditions not to get it.
b) what can be done about it?

Answer 1

After hours of facing the same problem and setting many many breakpoints I found a solution for my environment, I hope others can benefit from it:
inside Folder App_Start
public class FilterConfig
{
public static void RegisterGlobalFilters(GlobalFilterCollection filters)
{
var attr=new InitializeSimpleMembershipAttribute();
// here is the important part
attr.OnActionExecuting(new ActionExecutingContext());
filters.Add(attr);
}
}
Background: In my app I have 2 views:
/Account/Register: this is part of the standard asp.mvc 4 templates and has the attribute [AllowAnonymous]
/Task: this is the "Index"-View of a todo-list, The TaskController has the attribute [Authorize(Roles="Administrator")]
I always had the problem in the following sitation:
debugging session in browser
successfull login
open the view "/Task" which requires authorization
switch to visual studio and keep the browser open
stop debugging
change some code inside a controller (setting some whitespace is enough)
start debugging session
press refresh in browser
At this point the method "OnActionExecuting" inside the class InitializeSimpleMembershipAttribute was not yet called (determined by setting breakpoints)!
But when I opened a View which doesn't require Authorization (i.e. /Account/Register) the Method "OnActionExecuting" was called. After this I could call /Task without errors.
So the solution was to make a "pseudocall" for "OnActionExecuting" on application-startup.

Answer 2

You should not need to init the database connection every time your HttpModule is called. Just do it once at application start up. Here is an article that explains how to use SimpleMembership for authentication/authorization of Web API calls. There is also a link to source code for the example project.