我有一个用户控件,其中包含一个ComboBox和一个SelectedIndexChanged事件处理程序。在事件处理程序中,我需要能够知道先前选定的索引是什么...有没有人能指点一下?
private void cboTargetMode_SelectedIndexChanged(object sender, EventArgs e)
{
// need to get the previously selected index and do some handling here...
// ... some handler code here ...
switch (cboTargetMode.SelectedIndex)
{
case 1: // ..... some code here...
break;
case 2: // ..... some code here...
break;
case 3: // ..... some code here...
break;
default: // ..... some code here...
break;
}
}