UpdatePanel In formview Insert and updateItem

Question

Hi All,

I use a FormView control with InsertItemTemplate and updateItemtemplate. In each ItemTemplate I would like using UpdatePanel with the same web control inside, but it returns me a compilation error. If I put an UpdatePanel in insert and not update it works.

Why can t I not put in the same UpdatePanel insertItemTemplate and updateItemTemplate?

For example, with this code the error is

BC30260: 'DropDownListC' is already declared

<asp:FormView ID="FormView1" runat="server" DataKeyNames="id" DataSourceID="Sqlsource"
        DefaultMode="Insert">
        <EditItemTemplate>
            <asp:UpdatePanel ID="UpdatePanel_categories" runat="server" UpdateMode="Conditional">
                <ContentTemplate>
                    <DDCategories:DropDownCategories ID="BC30260: 'DropDownListCategorie' is already declared" runat="server" AjouterChoixVide="true"
                        SelectedValue='<%# Bind("s_id") %>' OnSelectedIndexChanged="DropDownListC_OnSelectedIndexChanged"
                        AutoPostBack="true" />
                </ContentTemplate>
            </asp:UpdatePanel>
        </EditItemTemplate>
        <InsertItemTemplate>
            <asp:UpdatePanel ID="UpdatePanel_categories" runat="server" UpdateMode="Conditional">
                <ContentTemplate>
                    <DDCategories:DropDownCategories ID="DropDownListC" runat="server" AjouterChoixVide="true"
                        SelectedValue='<%# Bind("s_id") %>' OnSelectedIndexChanged="DropDownListC_OnSelectedIndexChanged"
                        AutoPostBack="true" />
                </ContentTemplate>
        </InsertItemTemplate>
    </asp:FormView>

Thank for you answer

Shakta