grid view เปลี่ยน default modeเป็น insert ยังไงครับ..........

myGridView.ShowFooter = true;

<asp:GridView ID="Customers" runat="server" AutoGenerateColumns="False"
        DataSourceID="CustomersSqlDataSource" DataKeyNames="CustomerId" ShowFooter="true"
        onrowcommand="Customers_RowCommand">
        <Columns>
            <asp:TemplateField HeaderText="CustomerId">
                <ItemTemplate>
                    <%# Eval("CustomerId") %>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="FirstName">
                <ItemTemplate>
                    <%# Eval("FirstName") %>
                </ItemTemplate>
                <EditItemTemplate>
                    <asp:TextBox runat="server" ID="EditFirstName" Text=''
                    <%# Bind("FirstName") %>' />
                </EditItemTemplate>
                <FooterTemplate>
                    <asp:TextBox runat="server" ID="InsertFirstName" Text=''
                    <%# Bind("FirstName") %>' />
                </FooterTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="LastName">
                <ItemTemplate>
                    <%# Eval("LastName") %>
                </ItemTemplate>
                <EditItemTemplate>
                    <asp:TextBox runat="server" ID="EditLastName" Text=''
                    <%# Bind("LastName") %>' />
                </EditItemTemplate>
                <FooterTemplate>
                    <asp:TextBox runat="server" ID="InsertLastName" Text=''
                    <%# Bind("LastName") %>' />
                </FooterTemplate>
            </asp:TemplateField>
 
            <asp:TemplateField HeaderText="Commands">
                <ItemTemplate>
                    <asp:Button runat="server" ID="Edit" Text="Edit" CommandName="Edit" />
                    <asp:Button runat="server" ID="Delete" Text="Delete" CommandName="Delete" />
                </ItemTemplate>
                <EditItemTemplate>
                    <asp:Button runat="server" ID="Update" Text="Update" CommandName="Update" />
                    <asp:Button runat="server" ID="Cancel" Text="Cancel" CommandName="Cancel" />
                </EditItemTemplate>
                <FooterTemplate>
                    <asp:Button runat="server" ID="Insert" Text="Insert" CommandName="InsertNew" />
                    <asp:Button runat="server" ID="Cancel" Text="Cancel" CommandName="CancelNew" />
                </FooterTemplate>
            </asp:TemplateField>
        </Columns>
        <EmptyDataTemplate>
            First Name:<asp:TextBox runat="server" ID="NoDataFirstName" />
            Last Name:<asp:TextBox runat="server" ID="NoDataLastName" />
            <asp:Button runat="server" ID="NoDataInsert" CommandName="NoDataInsert" Text="Insert"/>
        </EmptyDataTemplate>
    </asp:GridView>