dataGridView单击事件中,显示数据的读取+性别或是状态的读取

 对数据库中bit型的State类型‘1’or‘0’的判断，显示出来时候就是是否了

 //联表查询,根据user表中id查请假表中的数据
        public DataTable selectLeaveMessage(string chineseWord)
        {
            string sql = string.Format("SELECT leaveMessage.UserId, leaveMessage.TrueName, leaveMessage.LeaveTime, leaveMessage.LeaveType,leaveMessage.AppDays, leaveMessage.AddTime ,leaveMessage.State,(case leaveMessage.State when 1 then '是' else '否' end )as Stateaa FROM leaveMessage INNER JOIN demoUsers ON leaveMessage.UserId = demoUsers.UserId  WHERE (demoUsers.ChineseWord like @chineseWord )");
            DataConn conn = new DataConn(conStr);
            ArrayList paramlist = new ArrayList();
            paramlist.Add(conn.CreateParameter("@chineseWord", "%" + chineseWord + "%", DbType.String, 50));
            IDataParameter[] param = (IDataParameter[])paramlist.ToArray(typeof(IDataParameter));
            return conn.testDataTable(sql, param);
        }

多了(case leaveMessage.State when 1 then '是' else '否' end )as Stateaa

红体为新建绑定值在dGV控件中，还可以联想到以后数据库中非空值与空值的处理，可以默认一个初始事件，相当于空值了，这样就避免notnull的冲突，casewhen的判断

.............................................................................数据的读取.............................................................

如果数据是全齐的,要从dataGridView中点击读取到from上,那么可以选择直接读取,或者是获取ID再从数据中读取. 

从datagridview控件，点击显示数据

this.label16.Text = dGV1.Rows[e.RowIndex].Cells["LeaveTime"].Value.ToString();

                                              当前的行                    要显示的列