通过C＃启动/停止Windows服务，并以管理员身份运行，而没有UAC提示窗口

Question

I need to start / stop a windows service from C# code at specific time everyday. So i have written a simple C# program. My program only works when i run it as administrator. Its fine I have written code to run my program as admin.

Now i am stuck in the situation where my C# code runs the exe file as "Admin" but the UAC window appears with program wants to change settings etc msg.

I need my c# code file runs under windows scheduler which means no human interaction is wanted. As for UAC window, user needs to select yes.

How can i get rid of that or work around so my program will execute and stop service completely pragmatically without any human interaction?

Answer 1

Create a version of your program that accepts a

Sam.exe /StopAndStopTheWindowsServiceINeedToSmack

On startup of your app, check for the command line switch. If present, then to the stop/start.

Then create a scheduled task which runs your app with the command line option, and has the Run with highest privileges option set:

Then use the Task Scheduler 2.0 API to programatically start the scheduled task.

Bonus Chatter: A chunk of code

public Form1()
{
    InitializeComponent();

    //Ideally this would be in program.cs, before the call to Application.Run()
    //But that would require me to refactor code out of the Form file, which is overkill for a demo
    if (FindCmdLineSwitch("StopAndStopTheWindowsServiceINeedToSmack", true))
    {
        RestartService("bthserv"); //"Bluetooth Support Service"
        Environment.Exit(0);
    }
}

private bool FindCmdLineSwitch(string Switch, bool IgnoreCase)
{
    foreach (String s  in System.Environment.GetCommandLineArgs())
    {
        if (String.Compare(s, "/" + Switch, IgnoreCase) == 0)
            return true;
        if (String.Compare(s, "-" + Switch, IgnoreCase) == 0)
            return true;
    }
    return false;
}

And we restart the service:

private void RestartService(String ServiceName)
{
    TimeSpan timeout = TimeSpan.FromMilliseconds(30000); //30 seconds

    using (ServiceController service = new ServiceController(ServiceName))
    {
        try
        {
            service.Start();
        }
        catch (Exception e)
        {
            MessageBox.Show(e.Message, "Error stopping service");
            return;
        }
        service.WaitForStatus(ServiceControllerStatus.Stopped, timeout);

        try
        {
            service.Start();
        }
        catch (Exception e)
        {
            MessageBox.Show(e.Message, "Error starting service");
            return;
        }
        service.WaitForStatus(ServiceControllerStatus.Stopped, timeout);
    }
}

Bonus: checking if you're running elevated:

private Boolean IsUserAnAdmin()
{
    //A user can be a member of the Administrator group, but not an administrator.
    //Conversely, the user can be an administrator and not a member of the administrators group.

    //Check if the current user has administrative privelages
    var identity = WindowsIdentity.GetCurrent();
    return (null != identity && new WindowsPrincipal(identity).IsInRole(WindowsBuiltInRole.Administrator));
}

Note : Any code released into public domain. No attribution required.