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Need to know if user is administrator

Posted on 2011-03-02
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Last Modified: 2013-12-17
How can I tell if the user is an administrator?
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Question by:rmmarsh
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3 Comments
 
LVL 42

Expert Comment

by:sedgwick
ID: 35018378
To detect this you can get an object of WindowsIdentity like this:

WindowsIdentity identity = WindowsIdentity.GetCurrent();

Then create an instance of WindowsPrincipan by :

WindowsPrincipal principal = new WindowsPrincipal(identity);

and finally check it by using IsInRole() method like this:

string role = "BUILTIN\\Administrators";
bool IsAdmin = principal.IsInRole(role));

then you can use the IsAdmin variable to determine whether the current user is an Admin or not.
from http://csharptuning.blogspot.com/2007/09/detecting-is-current-user-is.html
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sedgwick earned 2000 total points
ID: 35018384
another one:
//namespace imports
using System.Security.Principal;

/// <summary>
/// method for checking to see if the logged in user
/// is in the Administrator's group
/// </summary>
/// <returns></returns>
public bool IsUserAdministrator()
{
    //bool value to hold our return value
    bool isAdmin;
    try
    {
        //get the currently logged in user
        WindowsIdentity user = WindowsIdentity.GetCurrent();
        WindowsPrincipal principal = new WindowsPrincipal(user);
        isAdmin = principal.IsInRole(WindowsBuiltInRole.Administrator);
    }
    catch (UnauthorizedAccessException ex)
    {
        isAdmin = false;
        MessageBox.Show(ex.Message);
    }
    catch (Exception ex)
    {
        isAdmin = false;
        MessageBox.Show(ex.Message);
    }
    return isAdmin;
}

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Author Closing Comment

by:rmmarsh
ID: 35018842
Thank you...
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