I have a repeater which I want to add some text to after I have clicked a button.

But I keep getting the error:

A critical error has occurred.
Object reference not set to an instance of an object.

The code looks like this.

<table class="productList">
    <asp:Repeater ID="Repeater1" OnItemDataBound="ProductList_OnItemDataBound" runat="server">
        <HeaderTemplate>
            <tr>
                <th>Produkt</th>
                <th>Antal</th>
                <th>Antal tryck</th>
                <th>F&auml;rger</th>
                <th>Pris/st</th>
                <th>Schablonkostnad (<asp:Label ID="lbl_stencilHdr" runat="server" /> kr/f&auml;rg)</th>
                <th>Total (ex moms)</th>
                <th>Moms</th>
                <th>Totalt (ink moms)</th>
            </tr>
        </HeaderTemplate>
        <ItemTemplate>
            <tr>
                <td><asp:Label ID="lbl_product" Text="&nbsp;" runat="server" /></td>
                <td><asp:Label ID="lbl_quantity" runat="server" Text='<%# Eval("productQuantity")%>' /></td>
                <td><asp:Label ID="lbl_printQuantity" runat="server" /></td>
                <td><asp:Label ID="lbl_productColorQuantity" Height="18" runat="server" Text='<%# Eval("ProductColorQuantity")%>' /></td>
                <td><asp:Label ID="lbl_productPrice" Height="18" runat="server" Text='<%# Eval("ProductPrice")%>' /></td>
                <td><asp:Label ID="lbl_stencil" runat="server" /></td>
                <td><asp:Label ID="lbl_totPriceNoVat" runat="server" /></td>
                <td><asp:Label ID="lbl_vat" runat="server" /></td>
                <td><asp:Label ID="lbl_totPriceVat" runat="server" /></td>
            </tr>
        </ItemTemplate>
    </asp:Repeater>
</table>

protected void ProductList_OnItemDataBound(object sender, System.Web.UI.WebControls.RepeaterItemEventArgs e)
{
            Label product       = (Label)e.Item.FindControl("lbl_product");
            product.Text = "123456";

}

What am I doing wrong?

Aaah! I know this.

My mind went blank when it didn't work.

Thank you for helping!