Set value in Gridview Dropdownlist for Edit

In my gridview, there are three dropdownlists that appear when the gridview is in edit mode. Each has a textbox associated with it. When the user selects a name, the textbox is populated with the name selected.
When the data is loaded into the dropdown, the value is set to "Select Name".
What I would like to do is this: if a name already exists in the database, I'd like to bind the dropdown to it instead of "Select Name". I'm using a different sqldatasource to select the group of names that need to be in each dropdown.
Alternatively, I could just set the visible property of the dropdown to false if there is already a name in the database.
How can I do this?
I'm posting the source code for the template field.
Thanks for any help

<asp:TemplateField HeaderText="ME" SortExpression="MESig">
            <EditItemTemplate>
            <asp:TextBox runat="server" ID="edMESigTextBox" Text='<%# Bind("MESIG") %>'  ReadOnly="true" Width="100px" SkinID="InsertTB" AutoPostBack="true" />
            <asp:DropDownList runat="server" ID="edMESigDropdownlist" SkinID="DDLInsert2" OnSelectedIndexChanged="changeMETextBox" Width="120px" 
             AutoPostBack="True" DataSourceID="SelectMEName" AppendDataBoundItems="true" DataTextField="FNameLName" DataValueField="FNameLName">            
              <asp:ListItem Text="Select ME Name" Value="" />
            </asp:DropDownList>             
            </EditItemTemplate>
            <ItemTemplate>
              <asp:Label ID="Label6" runat="server" Text='<%# Bind("MESig") %>'></asp:Label>
            </ItemTemplate>
            <ItemStyle Width="60px" />
          </asp:TemplateField>

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