Setting headers for Odata client

Question

I've been trying to set authorization header value for Odata client. After I instantiate the client, I do it like this:

container.BuildingRequest += (sender, e) => OnBuildingRequest(sender, e, accessToken);
private static void OnBuildingRequest(object sender, BuildingRequestEventArgs e, string token)
{
    e.Headers.Add("Authorization", "Bearer " + token);
}

When debugging, it shows that the event handler gets triggered AFTER the request to the WEB API is made, which is really strange for me. The documentation says:

"This event is fired before a request message object is built"

What seems to be the problem here?

Answer 1

After lots of research, I found the cause of the problem: the event handler "BuildingRequest" doesn't gets triggered until you make an actual request, that is if you have a method something like:

public IQueryable<Package> GetPackages()
{
   return _container.Packages.AsQueryable();
}

"BuildingRequest" handler will not be triggered. You must execute it, that is do something like:

_container.Packages.ToList();

In order for it to work.

Answer 2

You have to set it like this:

container.SendingRequest2 += new EventHandler<SendingRequest2EventArgs>(delegate (object sender, SendingRequest2EventArgs e)
{
    e.RequestMessage.SetHeader("Authorization", "Bearer " + token);
});