获取Repeater选中行索引
//CheckBoxList che = ((CheckBoxList)sender);
//RepeaterItem rptItem = ((RepeaterItem)che.Parent);
//string pkid = ((Literal)rptItem.FindControl("字?段?Literal")).Text;
CheckBoxList che = sender as CheckBoxList;
int index = ((RepeaterItem)che.NamingContainer).ItemIndex;
Response.Write(index);