asp.net looping through dynamic control in a table - asp.net

Question

i have a table which contains questions and a bunch of dynamically created radio button lists, i m trying to write code which will loop through each one of the radio button list and get the value of the selected question value and corresponding question id . i have the following code which returns the selected radio button list value.how i will get questions ids as well as their selected value?
For Each ctrl As Control In form1.Controls
If TypeOf ctrl Is RadioButtonList Then
Dim rbl As RadioButtonList = DirectCast(ctrl, RadioButtonList)
For i As Integer = 0 To rbl.Items.Count - 1
If rbl.Items(i).Selected Then
Dim value As String = rbl.SelectedValue
End If
Next
End If
Next

Answer 1

When creating the radio buttons you should put them into a dictionary (make sure to do so in the Init phase). The String key is assumed to hold the question id:
Dim radios As New Dictionary(Of String, RadioButtonList)
Dim table As DataTable
Sub Page_Init(sender As Object, e As EventArgs)
table = ...
For Each row As DataRow In table.Rows
Dim rbl As New RadioButtonList
' add radio buttons to rbl
radios.Add(row("id").ToString, rbl)
Next
End Sub
Then in the event handler for retrieving the answers you can easily access them:
Sub MyHandler(sender As Object, e As EventArgs)
For Each row As DataRow In table.Rows
Dim value As String = GetAnswer(row("id").ToString)
' do something with the answer ...
Next
End Sub
Function GetAnswer(id As String) As String
For Each item In radios(id)
If item.Selected Then Return item.SelectedValue
Next
Return Nothing
End Function