How do I force my .NET application to run as administrator? – Dev

The best answers to the question “How do I force my .NET application to run as administrator?” in the category Dev.

QUESTION:

Once my program is installed on a client machine, how do I force my program to run as an administrator on Windows 7?

ANSWER:

Adding a requestedExecutionLevel element to your manifest is only half the battle; you have to remember that UAC can be turned off. If it is, you have to perform the check the old school way and put up an error dialog if the user is not administrator
(call IsInRole(WindowsBuiltInRole.Administrator) on your thread’s CurrentPrincipal).

ANSWER:

You’ll want to modify the manifest that gets embedded in the program. This works on Visual¬†Studio¬†2008 and higher: Project + Add New Item, select “Application Manifest File”. Change the <requestedExecutionLevel> element to:

 <requestedExecutionLevel level="requireAdministrator" uiAccess="false" />

The user gets the UAC prompt when they start the program. Use wisely; their patience can wear out quickly.

ANSWER:

I implemented some code to do it manually:

using System.Security.Principal;
public bool IsUserAdministrator()
{
    bool isAdmin;
    try
    {
        WindowsIdentity user = WindowsIdentity.GetCurrent();
        WindowsPrincipal principal = new WindowsPrincipal(user);
        isAdmin = principal.IsInRole(WindowsBuiltInRole.Administrator);
    }
    catch (UnauthorizedAccessException ex)
    {
        isAdmin = false;
    }
    catch (Exception ex)
    {
        isAdmin = false;
    }
    return isAdmin;
}

ANSWER:

The detailed steps are as follow.

  1. Add application manifest file to project
  2. Change application setting to “app.manifest”
  3. Update tag of “requestedExecutionLevel” to requireAdministrator.

Adding file in Solution

Select Application Manifest File

Select Manifest option

Update Manifest file

Note that using this code you need to turn off the security settings of ClickOnce, for do this, go inside Properties -> Security -> ClickOnce Security