protected void Repeater1_ItemCommand(object source, RepeaterCommandEventArgs e)
    {
        if (e.Item.ItemType == ListItemType.Header || e.Item.ItemType == ListItemType.Item)
        {
            CheckBox cb = (CheckBox)Repeater1.FindControl("CheckBox2");
            CheckBox cbs = (CheckBox)Repeater1.FindControl("CheckBox1");
            if (cb.Checked)
            {
                Response.Write("123");
            }
            else
            {
                Response.Write("456");
            }
        }
    }
.....为什么执行不到..实现repeater checkbox 全选反选