hai ythisbug,
<pre lang="xml"><asp:HyperLinkField DataNavigateUrlFields="fieldtopass"
DataNavigateUrlFormatString="url?fieldtopass={0}"
HeaderText="headertext" Text="History">
<ControlStyle Font-Underline="True" Font-Bold="true" />
<ItemStyle HorizontalAlign="Center" />
</asp:HyperLinkField>
</pre>
it ll pass the value as query string ... u can assign query string value to textbox