private void bAdd_Click(object sender, EventArgs e)
 {
     try
     {
         UserInfo ur = new UserInfo();
         ur.Permission    = "0";
         ur.LastLoginTime = DateTime.Now;
         ur.LoginUserName = "******";
         ur.Pwd           = CommonHelper.GetMD5Code("666666");
         ur.NoteName      = "Operator";
         ur.Role          = "Operator";
         ur.UserId        = urs.Count;
         urs.Add(ur);
         UserInfoHelper.AddUserInfo(ur);
         UpdateUserInfo();
     }
     catch (Exception)
     {
     }
 }