ASP.NET can't find controls in a repeater

Question

Repeater markup:

<asp:Repeater ID="Repeater_sorular" runat="server" OnItemCommand="Repeater_sorular_ItemCommand"
        OnItemDataBound="Repeater_sorular_ItemBound">
        <HeaderTemplate>
        </HeaderTemplate>
        <ItemTemplate>
            <table>
                <tr>
                    <td>
                        <rad:RadChart ID="RadChart1" runat="server" DefaultType="Pie" Width="700">
                            <PlotArea Appearance-FillStyle-FillType="Gradient" Appearance-FillStyle-MainColor="#D90420"
                                Appearance-FillStyle-SecondColor="#FFAD4A" Appearance-Border-Visible="false">
                                <EmptySeriesMessage>
                                    <TextBlock Text="Seçilen anket henüz oylanmamıştır.">
                                        <Appearance TextProperties-Font="Tahoma, 10pt, style=Bold">
                                        </Appearance>
                                    </TextBlock>
                                </EmptySeriesMessage>
                            </PlotArea>
                            <ChartTitle>
                                <TextBlock Appearance-TextProperties-Font="Tahoma">
                                </TextBlock>
                            </ChartTitle>
                            <Appearance ImageQuality="HighQuality" Border-Color="#DFDDDD" TextQuality="ClearTypeGridFit">
                            </Appearance>
                            <Series>
                                <rad:ChartSeries Type="Pie" Appearance-TextAppearance-TextProperties-Color="#FFFFFF"
                                    Appearance-TextAppearance-TextProperties-Font="Tahoma">
                                </rad:ChartSeries>
                            </Series>
                            <Legend Visible="True">
                                <TextBlock Visible="True">
                                </TextBlock>
                            </Legend>
                        </rad:RadChart>
                    </td>
                    <td>
                        <div style="font-weight: bolder; padding: 5px;">
                            <%#(((RepeaterItem)Container).ItemIndex+1).ToString() %>.
                            <%#Eval("Subject")%>
                        </div>
                        <asp:BulletedList ID="BulletedList_secenekler" runat="server" DataSource='<%#Eval("Secenekler")%>'
                            DataTextField="OptionName" DataValueField="OptionId" CssClass="sira_numarali">
                        </asp:BulletedList>
                    </td>
                </tr>
            </table>
        </ItemTemplate>
        <FooterTemplate>
        </FooterTemplate>
    </asp:Repeater>

and repeater ItemDataBoundEvent:

protected void Repeater_sorular_ItemBound(object sender, RepeaterItemEventArgs e)
{
    RadChart RadChart1 = (RadChart)e.Item.FindControl("RadChart1");
    BulletedList bl = (BulletedList)e.Item.FindControl("BulletedList_secenekler");
}

When I debugged it controls return null. How can I fix it.

Thanks.

Answer 1

The method is called for each row you have, including the header. It's possible you are getting null the for the first row as the first one is the header (and it's empty). In order to solve it, you need to filter the method with

if(e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem) {
    //your code 
}