C# 设置电脑关机、重启、注销、锁定、关闭显示器的类（支持win7,win8）

public class MyComputer

{

[DllImport("user32")]

public static extern bool ExitWindowsEx(uint uFlags,uint dwReason);

[DllImport("user32")]

public static extern void LockWorkStation();

[DllImport("user32")]

public static extern int SendMessage(int hWnd,int hMsg,int wParam,int lParam);

public enum MonitorState

{

MonitorStateOn=-1,

MonitorStateOff=2,

MonitorStateStandBy=1

}

public static void ShutDown()

{

try

{

System.Diagnostics.ProcessStartInfo startinfo = new System.Diagnostics.ProcessStartInfo("shutdown.exe", "-s -t 00");

System.Diagnostics.Process.Start(startinfo);

}

catch { }

}

public static void Restart()

{

try

{

System.Diagnostics.ProcessStartInfo startinfo = new System.Diagnostics.ProcessStartInfo("shutdown.exe", "-r -t 00");

System.Diagnostics.Process.Start(startinfo);

}

catch { }

}

public static void LogOff()

{

try

{

ExitWindowsEx(0, 0);

}

catch { }

}

public static void LockPC()

{

try

{

LockWorkStation();

}

catch { }

}

public static void Turnoffmonitor()

{

SetMonitorInState(MonitorState.MonitorStateOff);

}

private static void SetMonitorInState(MonitorState state)

{

SendMessage(0xFFFF, 0x112, 0xF170, (int)state);

}

}