Multiple sortable headers(linkbuttons) per column?

[tonicvodka]

Hi all and Good Morning!

I've constructed a datagrid with two template columns, each
retrieving data from several database fields. Still I want to be able
to sort on each of these several database fields, is this possible?

I tried setting sortexpression in the link button like:

<asp:LinkButton id="lnkDate" CommandName="sort" SortExpression="Date"
runat="server">Date</asp:LinkButton>

But as expected, SortExpression isn't passed along.

Any help greatly appreciated,
Niclas