C#comboBox取消SelectedIndexChanged事件

问题： comboBox在加载数据源时会默认引发SelectedIndexChanged事件、

解决： 在comboBox加载数据源时添加如下代码

                cmbGroupName.SelectedIndexChanged -= new System.EventHandler(cmbGroupName_SelectedIndexChanged);//去掉SelectedIndexChanged事件
                cmbGroupName.DataSource = handleData.GetGroupName();                                                                                   //加载数据源
                cmbGroupName.SelectedIndexChanged += new System.EventHandler(cmbGroupName_SelectedIndexChanged);//重新加载SelectedIndexChanged事件

备注： cmbGroupName为控件名称