Other User for new Thread

t.kehl posted on Saturday, October 01, 2011

Hi. I have a WPF-Application. There i start a seperate Thread, when the application starts. Now, I should set a other User for this Thread then the Application has. I have seen, that this works for non-WPF-Application. But in WPF-Application, the User (principal) will be stored in the ApplicationContext for WPF and always this is used. Is there a way, that I can set a other User for one thread in a WPF-Application?

 

Thank you.

Best Regards, Thomas

t.kehl replied on Saturday, October 01, 2011

Hi.

I have now tried something. When I change GetUser() of Csla.Xaml.ApplicationContextManager to this:

    public IPrincipal GetUser()
    {
      IPrincipal current;
      if (System.Windows.Application.Current != null)
      {
        if (_principal == null)
        {
          if (ApplicationContext.AuthenticationType != "Windows")
            _principal = new Csla.Security.UnauthenticatedPrincipal();
          else
            _principal = new WindowsPrincipal(WindowsIdentity.GetCurrent());
        }
        if (Thread.CurrentPrincipal is Csla.Security.CslaPrincipal && !(Thread.CurrentPrincipal is Csla.Security.UnauthenticatedPrincipal)) {
            current = Thread.CurrentPrincipal;
        } else {
            current = _principal;
        }
      }
      else
        current = Thread.CurrentPrincipal;
      return current;
    }

It is working for me. Now my question: Does I have problems which I don't see now, with this solution? Can this solution work general or would it be possible to change Csla, that I can change this logic from outside - for example with an Event?

Best Regards, Thomas