public void lblSort_Command(object sender, EventArgs e)
{
SortParm = DefaultSort;
LinkButton lb = (LinkButton)sender;
string sSortField = "";
try { sSortField = lb.CommandName.ToString(); } catch { }
sSortField = ResetSortToColumn(sSortField);
DefaultSort = sSortField;
base.DataBind();
}