Hello larzeb,

Ive encountered a similar situation in an ASP.NET application, and I dont
believe the solution is that far off for a winforms app.

My solution involved deriving from GenericIdentity and adding a company to
the class.

public class MyIdentity : GenericIdentity
{
   private readonly string company;

   public MyIdentity(string username, string company) : base(username)
   {
       this.company = company;
   }

   public string Company { get { return company; } }
}

Now, pass an instance of this class off to GenericPrincipal and set the thread
principal in your validation method like this:

string[] roles = someMethodToGetTheRoles();
IIdentity identity = new MyIdentity(username, company);
IPrincipal principal = new GenericPrincipal(identity, roles);

AppDomain.CurrentDomain.SetThreadPrincipal(principal);

Later, when you need to check the company, use

MyIdentity identity = (MyIdentity)Thread.CurrentPrincipal.Identity;

--
Matt Berther
http://www.mattberther.com

Hi Lars,

I think this is a wide topic. This is based on what type of application you
created, and which architecture your application used.

I think your request is somewhat like: how to achieve the Asp.net Forms
authentication in Winform app. Matt's solution is wrapping the company
information in GenericIdentity object, then store it through
AppDomain.CurrentDomain.SetThreadPrincipal, normally, if your application
is single thread, this may meet your need. But if your application is
multi-threaded, and the module in another thread can not access this
Generic identity in appDomain's main thread.

I think another possible solution may just create a tool class, which we
can use a static field of this class to store the company information, and
all the modules in the Application can access this tool class's static
field without problem.

Hope this helps.
=================================================
Thank you for your patience and cooperation. If you have any questions or
concerns, please feel free to post it in the group. I am standing by to be
of assistance.

Best regards,
Jeffrey Tan
Microsoft Online Partner Support