How to find the Label in ItemTemplate in a GridView

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C#

ASP.NET

I have a GridView, one of which collumn has been transformed to TemplateField that likes this:

<asp:TemplateField HeaderText="ID" SortExpression="id">
    <EditItemTemplate>
        <asp:TextBox ID="TextBox_Edit_ID" runat="server" Text='<%# Bind("id") %>' ></asp:TextBox>
    </EditItemTemplate>
    <ItemTemplate>
        <asp:Label ID="Label_Edit_ID" runat="server" Text='<%# Bind("id") %>'></asp:Label>
    </ItemTemplate>
</asp:TemplateField>

I have found the TextBox control in GridView's RowUpdating event by the code that likes this

protected void GridView_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
TextBox tb = (TextBox)GridView.Rows[e.RowIndex].FindControl("TextBox_Edit_Name");
//other code here......
}

But I could not find the Label control "Label_Edit_ID" by similar code, for example:

protected void GridView_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
TextBox tb = (TextBox)GridView.Rows[e.RowIndex].FindControl("TextBox_Edit_Name");
Label lbl = (Label)GridView.Rows[e.RowIndex].FindControl("Label_Edit_Name");
//other code here......
}

Everytime the code runs, it meets an error showing that the lbl is null. Is it impossible to find control in ItemTemplate ?