Retrieving postback values of dynamically created RadioButtonList does not work

Question

The situation is as following: I am creating a survey where there are X questions and each question could be answered with six choices. Since there is only one choice allowed, I use a RadioButtonList and since there are X questions, I use a ASP.NET Repeater to generate the RadioButtionList.

ASPX code:

<asp:Repeater runat="server" ID="ActualSurvey">
    <HeaderTemplate>
        <table>
            <tr>
                <th class="headLeftCol leftCol headerCol">
                    Bank
                </th>
                <th class="headerCol">
                    1
                </th>
                <th class="headerCol">
                   2
                </th>
                <th class="headerCol">
                    3
                </th>
                <th class="headerCol">
                   4
                </th>
                <th class="headerCol">
                    5
                </th>
                <th class="headerCol">
                    6
                </th>
            </tr>
    </HeaderTemplate>
    <ItemTemplate>
        <tr class="even">
            <td class="leftCol">
                <%# ((ReliabilityMeter.DataAccessLayer.Bank)Container.DataItem).DisplayName %>
            </td>
            <td class="midCol" colspan="6">
                <asp:RadioButtonList ID="rbl1" runat="server" CssClass="radioButtonList" RepeatDirection="Horizontal">
                    <asp:ListItem data-rating="1" />
                    <asp:ListItem data-rating="2"/>
                    <asp:ListItem data-rating="3"/>
                    <asp:ListItem data-rating="4"/>
                    <asp:ListItem data-rating="5"/>
                    <asp:ListItem data-rating="6" Selected="True" />
                </asp:RadioButtonList>
            </td>
        </tr>
    </ItemTemplate>
    <AlternatingItemTemplate>
        <tr class="odd">
            <td class="leftCol">
                <%# ((ReliabilityMeter.DataAccessLayer.Bank)Container.DataItem).DisplayName %>
            </td>
            <td class="midCol" colspan="6">
                <asp:RadioButtonList ID="rbl2" runat="server" CssClass="radioButtonList" RepeatDirection="Horizontal">
                    <asp:ListItem data-rating="1"/>
                    <asp:ListItem data-rating="2"/>
                    <asp:ListItem data-rating="3"/>
                    <asp:ListItem data-rating="4"/>
                    <asp:ListItem data-rating="5"/>
                    <asp:ListItem data-rating="6" Selected="True" />
                </asp:RadioButtonList>
            </td>
        </tr>
    </AlternatingItemTemplate>
</asp:Repeater>
<tr class="footerRow">
    <td colspan="7">
        <asp:Button ID="SubmitButton" runat="server" Text="Insturen" OnClick="SubmitButton_Click" />
    </td>
</tr>
</table>

When I postback, I got the following code: C# Code behind

protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            ActualSurvey.DataSource = new BankManager().GetBanks();
            ActualSurvey.DataBind();
        }
    }

protected void SubmitButton_Click(object sender, EventArgs e)
    {
        //Check if the page is valid and the request is valid
        if (Page.IsValid && IsValidRequest)
        {
            //Iterate through each repeater item to find the RadioButtonList
            foreach (RepeaterItem repeaterItem in ActualSurvey.Items)
            {
                var bank = repeaterItem.DataItem as Bank;
                RadioButtonList radioButtons = repeaterItem.Controls.FindControl<RadioButtonList>();
                var rating = FindRating(radioButtons);
            }
        }
    }

At SubmitButton_Click the ActualSurvey.Items is filled but empty inside, I guess that it has got something to do with the Page Lifecylebut I can't figure it out... Also Page.Request.Forms does not contain the values.

Any help would be appreciated.

Kind regards

Answer 1

Your ListItem definitions seems to me weird.

<asp:ListItem data-rating="1"/>
<asp:ListItem data-rating="2"/>

Did you try to change them like below

<asp:ListItem Value="1"/>
<asp:ListItem Value="2"/>