hi,
When I do like that, it force me to key in the textbox's text exactly same as the ddl's item value.
Example:
<asp

ropDownList ID="ddlSearch" runat="server">
<asp:ListItem Value="ModelName">Model Name</asp:ListItem>
<asp:ListItem Value="ModelNo">Model No</asp:ListItem>
</asp

ropDownList>
if I key in "name1", the error is:
Invalid column name 'name1
if I key in "ModelName", display all the GV rows