gridview code

 i have a dropdown control in gridview.
 <asp:TemplateField  HeaderText="Description">
        <ItemTemplate>
        <asp:DropDownList ID="drop1" runat="server">
        </asp:DropDownList>
        </ItemTemplate>
 </asp:TemplateField>
i want to add item to dropdown statically an insert it's value in sqlserver database when an item selected.
tanx

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