checkboxlist 全选

.aspx

<script language=javascript>
function ChooseAll()
{
    var inputs=document.all.tags("input");
    for(var i=0;i < inputs.length;i++)   //   遍历页面上所有的   input  
    {
        if(inputs[i].type == "checkbox" && inputs[i].value !="ctl00_ContentPlaceHolder1_chkSelectAll")
        {
            inputs[i].checked = document.getElementById("ctl00_ContentPlaceHolder1_chkSelectAll").checked;
        }
    }
}
</script> 

.aspx.cs

chkSelectAll.Attributes.Add("onclick", "ChooseAll()");