How to get user input from dynamically created form - asp.net

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>

Answer 2

If you are using Asp.Net MVC you can reference this article. Model Bind To Collection
If its webforms you can always access each of the inputs submitted via the Request.Form collection.

Answer 3

Here is what I ended up doing for each question type, based on links including this one.
foreach (RepeaterItem item in myRptr.Items)
{
if (item.ItemType == ListItemType.Item || item.ItemType == ListItemType.AlternatingItem)
{
OracleCommand cmd = new OracleCommand();
cmd.Connection = conn;
cmd.CommandText = "myPackage.myProcedure";
cmd.CommandType = System.Data.CommandType.StoredProcedure;
cmd.Parameters.Add("user_id", OracleType.VarChar).Value = Session["UserId"].ToString();
cmd.Parameters.Add("question_id", OracleType.Number).Value = ((HiddenField)item.FindControl("myHidden")).Value;
cmd.Parameters.Add("answer", OracleType.VarChar).Value = ((TextBox)item.FindControl("myTxt")).Text;
cmd.ExecuteNonQuery();
}
}