同窗体中使用同一个数据源绑定下拉的combox出现数据的联动效果解决办法

                this.CboStartStationInfo.DisplayMember = "Name";
                this.CboStartStationInfo.ValueMember = "MID";
                this.CboEndStationInfo.DisplayMember = "Name";
                this.CboEndStationInfo.ValueMember = "MID";
                //// 绑定数据信息
                this.CboStartStationInfo.DataSource = returndata.Data;

                //// 关键代码为：
                this.CboEndStationInfo.DataSource = new BindingSource(returndata.Data, null);