How to use Ninject with HttpClient - asp.net-mvc

Question

What would be the recommended way to use Ninject to inject the same HttpClient object to all Controller instances in an application?
Currently, I am injecting an EntityFramework Database context following Adam Freeman's MVC book as follows. However, this creates a new dbContext for each controller instance, which is probably not ideal for HttpClient, since HttpClient is meant to be reused across all controllers in an MVC application.
Constructor:
public class AccountController : Controller
{
MyDBContext dbContext = new MyDBContext();
public AccountController(MyDBContext context)
{
dbContext = context;
}
...
}
And the Ninject Factory is as follows:
/// Class based on Adam Freeman's MVC book to use dependency injection to create controllers
public class NinjectControllerFactory : DefaultControllerFactory
{
private IKernel ninjectKernel;
public NinjectControllerFactory()
{
ninjectKernel = new StandardKernel();
AddBindings();
}
protected override IController GetControllerInstance(RequestContext requestContext, Type controllerType)
{
return controllerType == null
? null
: (IController)ninjectKernel.Get(controllerType);
}
private void AddBindings()
{
ninjectKernel.Bind<MyDBContext>().ToSelf().InTransientScope();
}
}

Answer 1

You just have to change your configuration to:
ninjectKernel.Bind<MyDBContext>().ToSelf().InRequestScope();
For more information about request scoping, please read this.

Answer 2

Thanks Steven. Currently, I find that the following works. I created a static HttpClient property in the NinjectController and bound it as constant in singleton scope. Daniel's book was helpful in better understanding Ninject.
/// Class based on Adam Freeman's MVC book to use dependency injection to create controllers
public class NinjectControllerFactory : DefaultControllerFactory
{
private IKernel ninjectKernel;
private static HttpClient WebAPIClient; // added
public NinjectControllerFactory()
{
ninjectKernel = new StandardKernel();
WebAPIClient = new HttpClient(); // added
WebAPIClient.BaseAddress = new Uri("http://localhost:1153"); // added
AddBindings();
}
protected override IController GetControllerInstance(RequestContext requestContext, Type controllerType)
{
return controllerType == null
? null
: (IController)ninjectKernel.Get(controllerType);
}
private void AddBindings()
{
ninjectKernel.Bind<MyDBContext>().ToSelf().InTransientScope();
ninjectKernel.Bind<HttpClient>().ToConstant(WebAPIClient).InSingletonScope(); // added
}
}