static void Main() { Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); Global.user_name = ""; Login l = new Login(); if (l.ShowDialog() == DialogResult.OK)//如果等于ok,就证明通过验证,则打开main窗口 { string _user = Global.user_name; main ma = new main(); Application.Run(ma); /*if(ma.ShowDialog()==DialogResult.OK){ //程序关闭时写数据库 if (_user.Length > 0) { quitWriteSql(); } }else{ ma.Dispose(); ma.Close(); Application.Exit(); }*/ if (ma.IsDisposed) { //程序关闭时写数据库 if (_user.Length > 0) { quitWriteSql(); } } } else { l.Dispose(); l.Close(); Application.Exit(); } }