string test difficulty asp.net

Question

H members
when i make a single test of string it work fine
user = HttpContext.Current.User.Identity.Name
Label7.Text = user

    If Not user = "STUPREMAT\M.houssem" Then
        Menu1.Items(2).Enabled = False
     End If

and when i make multiple test of string not work like this
user = HttpContext.Current.User.Identity.Name
Label7.Text = user
If Not Label2.Text = "STUPREMAT\B.Nizar" Or Not Label2.Text = "STUPREMAT\B.ATIK" Or Not Label2.Text = "STUPREMAT\M.houssem" Then
Menu1.Items(2).Enabled = False
End If
please help what is the problem

Answer 1

1. You set the caption of Label7 to user, but then check Label2, not Label7.
2. You should use And instead of Or. The Or condition will always evaluate to True.

If Not Label2.Text = "STUPREMAT\B.Nizar" And Not Label2.Text = "STUPREMAT\B.ATIK" And Not Label2.Text = "STUPREMAT\M.houssem" Then

Alternatively, place Not outside parentheses:

If Not (Label2.Text = "STUPREMAT\B.Nizar" Or Label2.Text = "STUPREMAT\B.ATIK" Or Label2.Text = "STUPREMAT\M.houssem") Then