void showlogin()
        {
            logOn log = new logOn();

            if (DialogResult.OK == log.ShowDialog(this))
            {
                this.Show();
                LogOnC loc = new LogOnC();
                _user = loc.GetOneUser(log.username);
            }
            else
            {
                this.Close();
            }
        }
        void TreeView1AfterSelect(object sender, TreeViewEventArgs e)
        {
            var n = (TreeNode)e.Node;
            //MessageBox.Show(n.Text);

            LogOnC users = new LogOnC();
            RuleC  rules = new RuleC();
            UserM  uses  = users.GetOneUser(n.Text);

            username.Text = uses.UserName;
            tbname.Text   = uses.Name;

            tbphone.Text = uses.Phone.ToString();
            cbrule_set_user_rule.Text = rules.GetRuleById(uses.Rule_id).Name;

            btnew.Text   = "New";
            btnedit.Text = "Edit";
            DisEnable();
            btnremove.Enabled = true;
            btnedit.Enabled   = true;
            btnew.Enabled     = true;
        }