Difference in WinForm Application and WPF Application

Muhammad Irshad

Hi Guys,

There is interesting problem down here.
I use this code

If My.User.CurrentPrincipal.IsInRole("Administrators") Then
MsgBox("Administrator")
Else
MsgBox("Not Administrator")
End If

in two different applications with below specs:
1. Windows Form Application with .NET Framework 3.5 (VB.NET)
2. WPF Windows Applciation with .NET Framework 3.5 (VB.NET)

In WinForm app it shows Administrator in Message Box. But, in WPF it shows Not Administrator.
What is reason behind this ? Any idea ?
Thanks,

Regards,
Itz.Irshad

5 Replies

Know the answer? Post it — somebody with the same question will find it here.

brunda k14y ago
http://stackoverflow.com/questions/1521520/how-to-use-windows-authentication-in-wpf
http://www.dreamincode.net/code/snippet1558.htm
My.User.Name is empty

Windows Form Application with .NET Framework 3.5 (VB.NET)  - Properties - EnableapplicationFramework - Authentication mode(Windows)

But WPF Windows Applciation with .NET Framework 3.5 (VB.NET) - Properties-EnableApplicationFramework,there is no option of Authentication mode

so we need use My.User.InitializeWithWindowsuser()

I tried this code and it worked in windows7
My.User.InitializeWithWindowsUser()
        If My.User.IsAuthenticated Then
            If My.User.IsInRole("Administrators") Then
                Label1.Content = "Admin"
            Else
                Label1.Content = "Not admin"
            End If
        End If
Muhammad Irshad14y ago
Nope. That piece of code is working accurately. But, not getting what is wrong with this code.
Anyhow, Thanks for your time.

Regards,
Itz.Irshad
Vulpes14y ago
In that case, I've no idea why the code should produce different answers from within WF and WPF applications :-/

Does the code I suggested in your previous thread for Windows 7 exhibit similar behaviour?
Muhammad Irshad14y ago
Dear Vulpes,

Both apps are running on same machine and OS is not either Win 7 or Vista. It's Win XP.
Thanks

Regards,
Itz.Irshad
Vulpes14y ago
Are you running the applications on the same machine or on different machines?

If it's the latter and both machines are running either Vista or Windows 7, then it could be due to a difference in UAC settings.