You may set AutoGenerateColumns propety of the GridView to False and add one BoundField with its datafiled as your" Namefield"

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False">
       <Columns>
            <asp:BoundField DataField="NameField" HeaderText="Name" SortExpression="NameField" />
        </Columns>
    </asp:GridView>