datalist中的checkbox
datalist   中每行有个checkbox   ,   取得checkbox选中行的datakeyfield的值

------解决方案--------------------
// 假设你的 ID 类型为 int
// asp.net 1.x
// IList idList = new ArrayList();
// asp.net 2.0
IList <int> idList = new List <int> ();
foreach(DataListItem item in MyDataList.Items)
{
CheckBox chk = item.FindControl( "MyCheckBoxID ") as CheckBox;
if(chk != null && chk.Checked) {
//idList.Add(MyDataList.DataKeys[item.ItemIndex]);
idList.Add((int)MyDataList.DataKeys[item.ItemIndex]);
}
}

Good Luck!