How to get user input from dynamically created form

Question

I am building an ASP.NET website that allows users to create and take tests. Tests can contain various types of questions (multiple choice, true/false, essay, etc.). Because of the dynamic nature of the tests, I am creating the "Take Test" page with repeaters.

My problem now is: how can I get the user's answers? With a fixed number/type of questions this would be simple, but I'm not sure how to grab answers from items with dynamically created IDs or how to pass a variable number of answers back to my database.

Edit: I found my answer here.

Answer 1

You can use Request.Form

But Here is Another approach using FindControl and Repeater:

    For Each item As RepeaterItem In Me.RptItems.Items

        Dim value = CType(item.FindControl("TxtName"), TextBox).Text

    Next

you can use FindControl method with each RepeaterItem and find desired control inside it by ID.

ASPX file:

<asp:Repeater ID="RptItems" runat="server">
    <HeaderTemplate>
        <table>
            <tr>
                <td>
                    Name
                </td>
            </tr>
    </HeaderTemplate>
    <ItemTemplate>
        <tr>
            <td>
                <asp:TextBox ID="TxtName" runat="server" Text='<%# Eval("Name")%>'></asp:TextBox>
            </td>
        </tr>
    </ItemTemplate>
    <FooterTemplate>
        </table>
    </FooterTemplate>
</asp:Repeater>