快速关机代码代码,CSharp代码库,德仔网

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【CSharp】快速关机代码
作者:dezai / 发布于2014/1/7/ 336
// 这个结构体将会传递给API。使用StructLayout
    [StructLayout(LayoutKind.Sequential, Pack = 1)]
    internal struct TokPriv1Luid
    {
      public int Count;
      public long Luid;
      public int Attr;
    }

    // 导入的方法必须是static extern的，并且没有方法体。调用这些方法就相当于调用Windows API。
    [DllImport("kernel32.dll", ExactSpelling = true)]
    internal static extern IntPtr GetCurrentProcess();

    [DllImport("advapi32.dll", ExactSpelling = true, SetLastError = true)]
    internal static extern bool OpenProcessToken(IntPtr h, int acc, ref IntPtr phtok);

    [DllImport("advapi32.dll", SetLastError = true)]
    internal static extern bool LookupPrivilegeValue(string host, string name, ref long pluid);

    [DllImport("advapi32.dll", ExactSpelling = true, SetLastError = true)]
    internal static extern bool AdjustTokenPrivileges(IntPtr htok, bool disall,
    ref TokPriv1Luid newst, int len, IntPtr prev, IntPtr relen);

    [DllImport("user32.dll", ExactSpelling = true, SetLastError = true)]
    internal static extern bool ExitWindowsEx(int flg, int rea);


    // 以下定义了在调用WinAPI时需要的常数。这些常数通常可以从Platform SDK的包含文件（头文件）中找到
    internal const int SE_PRIVILEGE_ENABLED = 0x00000002;
    internal const int TOKEN_QUERY = 0x00000008;
    internal const int TOKEN_ADJUST_PRIVILEGES = 0x00000020;
    internal const string SE_SHUTDOWN_NAME = "SeShutdownPrivilege";
    internal const int EWX_SHUTDOWN = 0x00000001;
    //internal const int EWX_LOGOFF = 0x00000000;
    //internal const int EWX_REBOOT = 0x00000002;
    //internal const int EWX_FORCE = 0x00000004;
    //internal const int EWX_POWEROFF = 0x00000008;
    //internal const int EWX_FORCEIFHUNG = 0x00000010;


    // 通过调用WinAPI实现关机，主要代码再最后一行ExitWindowsEx，这调用了同名的WinAPI，正好是关机用的。
    private static void DoExitWin(int flg)
    {
      bool ok;
      TokPriv1Luid tp;
      IntPtr hproc = GetCurrentProcess();
      IntPtr htok = IntPtr.Zero;
      ok = OpenProcessToken(hproc, TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, ref htok);
      tp.Count = 1;
      tp.Luid = 0;
      tp.Attr = SE_PRIVILEGE_ENABLED;
      ok = LookupPrivilegeValue(null, SE_SHUTDOWN_NAME, ref tp.Luid);
      ok = AdjustTokenPrivileges(htok, false, ref tp, 0, IntPtr.Zero, IntPtr.Zero);
      ok = ExitWindowsEx(flg, 0);
    }

/// <summary>
    /// 关机按钮
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private void btnShutDown_Click(object sender, EventArgs e)
    {
      DialogResult dr = MessageBox.Show(@"确定要关机吗？请保存信息后按'是'，不关机按'否'", "提示信息", MessageBoxButtons.YesNo, MessageBoxIcon.Information);
      if (dr == DialogResult.Yes)
      {
        CommonClass.DoExitWin(CommonClass.EWX_SHUTDOWN);
      }
    }
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