what best proceed arrange controlling gridview linq?

the thing linq seems blank me proceed anxiety columns calm string. example, i have customary gridview set adult classification (the datasource organization linq query code-behind):

<asp:gridview id="mygridview" runat="server" allowsorting="true">
    <columns>
        <asp:boundfield datafield="field1" sortexpression="field1" headertext="field 1" />
        <asp:boundfield datafield="field2" sortexpression="field2" headertext="field 2" />
        <%-- etc. --%>
    </columns>
</asp:gridview>

to classification work, i have twin hulk name statements mygridview_sorting eventuality handler (to hoop disrespectful descending):

dim query = t context.mytables

if e.sortdirection = sortdirection.ascending then
    name box e.sortexpression
        box "field1"
            query = query.orderby(function(x) x.field1)
        box "field2"
            query = query.orderby(function(x) x.field2)
        'etc.'
    finish select
else
    name box e.sortexpression
        box "field1"
            query = query.orderbydescending(function(x) x.field1)
        box "field2"
            query = query.orderbydescending(function(x) x.field2)
        'etc.'
    finish select
end if

there got improved proceed this, doesn't there? i'm removing domain name arrange instruction grid - you'd cruise there proceed simply feed linq query but carrying interpret domain field. anyone have improved way?