摘要： protected void Page_Load(object sender, System.EventArgs e){... string[] maindir = stypes.Split(new char[] { ',' }); for (int i = 0; i < maindir.Length; i++) { lbclasss.Items.Add(new ListItem(maindir[i])); }...}//lbclasss.SelectedIndex 每次取值都为-1 protected void btntypedel_Click(object sende 阅读全文