//首先要添加 System.ServiceProcess.dll 引用
   ServiceController sc = new ServiceController("MSSQLSERVER");

   //判斷服務(wù)是否已經(jīng)關(guān)閉
   if (sc.Status == ServiceControllerStatus.Stopped)
   {
    sc.Start();
    MessageBox.Show("SQL數(shù)據(jù)庫服務(wù)啟動成功！", "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Information);
   }

   //判斷服務(wù)是否已經(jīng)開啟
   if (sc.Status != ServiceControllerStatus.Stopped)
   {
    sc.Stop();
    MessageBox.Show("SQL數(shù)據(jù)庫服務(wù)成功關(guān)閉！", "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Information);
   }