how to include static dropdown list values in grid view edit item template

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ASP.NET

hi all,
i have a dropdown list with values all are static not dynamic, so i need to insert this into grid view for inserting new row or on edit i.e updation i need to bind the value of db value to this drop down list, i have written code in edit item template like as following.
<edititemtemplate>

<asp:DropDownList ID="ddlLineSupport" runat="server" DataTextField='<%# Eval("LT Line Supported") %>'>                                
                                <asp:ListItem Value="No">No</asp:ListItem>
                                <asp:ListItem Value="Yes">Yes</asp:ListItem>
                            </asp:DropDownList>

and in item template

<ItemTemplate>
                            <asp:Label ID="lblLineSupport" runat="server" Text='<%# Eval("LT Line Supported") %>'></asp:Label>
                        </ItemTemplate>

but on updating it is taking default first list item value , i need to bind db corresponding value,not first list item value so do i need to change any design code or should i follow row data bound event for binding listitems to dropdown even the values are static values??? can any one tell me which process should i follow???