/// <summary>
        /// 2.1 方式添加
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button1_Click(object sender, EventArgs e)
        {
            string strUserName = textBox1.Text.Trim();
            string strPwd      = textBox2.Text.Trim();

            if (string.IsNullOrEmpty(strUserName) || string.IsNullOrEmpty(strPwd))
            {
                MessageBox.Show("用户名和密码不可为空!");
                return;
            }

            //1.调用用户的业务逻辑,实现用户信息添加
            UserInfo _user = new UserInfo();

            _user.userName = strUserName;
            _user.userPwd  = strPwd;

            UserInfoManager usermanager = new UserInfoManager();
            DataSet         _Dt         = usermanager.GetList(string.Format("userName='******'", strUserName));

            if (_Dt.Tables != null && _Dt.Tables[0].Rows.Count > 0)
            {
                MessageBox.Show("同名称用户已存在,请输入其它用户名!");
                return;
            }
            if (usermanager.Add(_user))
            {
                _user.ID = usermanager.GetMaxId();
            }
            else
            {
                MessageBox.Show("添加失败!");
            }

            //2.添加成功将用户信息(需要获取此)添加到当前_RecordListView和RecordList列表中
            if (RecordList == null)
            {
                RecordList = new List <UserInfo>();
            }
            RecordList.Add(_user);

            _RecordListView.AddObject(_user);//刷新ListView 列表
        }