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asp Radiobuttonlist results not working when rbl's dynamically created

Posted on 2011-02-24
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Last Modified: 2012-05-11
I have 20 radiobuttonlists which are dynamically created - then declared when a form is submitted.

I also have some code which totals the number of answered questions and the total value of the answered questions. - this code used to work when the radiobuttonlists were hard coded into the page, but it now does not. - I am writing the number of questions answered and the total value of all answers to the page but they come back as 0.

Can anyone see why this might not work now that the radiobuttonlists are dynamically created.?

Sub btnSendFeedback_Click(sender as Object, e as EventArgs)

    Dim question1 As RadioButtonList = DirectCast(Page.FindControl("question1"), RadioButtonList)
    Dim question2 As RadioButtonList = DirectCast(Page.FindControl("question2"), RadioButtonList)
    Dim question3 ...
    ...
    Dim question19 As RadioButtonList = DirectCast(Page.FindControl("question19"), RadioButtonList)
    Dim question20 As RadioButtonList = DirectCast(Page.FindControl("question20"), RadioButtonList)

    Dim rblCount As Double
    Dim total As Double
    Dim avg As Double

    For Each ctrl As UI.Control In Me.myPanel.Controls
        If TypeOf ctrl Is RadioButtonList Then
            Dim rbl As RadioButtonList = DirectCast(ctrl, RadioButtonList)
            If rbl.SelectedIndex > -1 And not rbl.ID = "question18" Then
                Dim value As Double = Double.Parse(rbl.SelectedValue)
                total += value
                rblCount += 1
            End If
        End If
    Next

    Response.Write = rblCount & " - " & total & " - " & (total / rblCount)

End Sub

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Question by:bchambers233
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5 Comments
 
LVL 14

Expert Comment

by:robasta
ID: 34968870
are you setting the ID when you create the buttons? post the code that creates the radio buttons
0
 

Author Comment

by:bchambers233
ID: 34968883
Sub Page_Load(ByVal Sender as Object, ByVal E as EventArgs)

        For i As Integer = 1 To 20

            Dim TableRow As New TableRow()
            Dim TableRowCell_1 As New TableCell()
            TableRow.Cells.Add(TableRowCell_1)
            holidayQuestionnaireTable.Rows.Add(TableRow)

            Dim question As New RadioButtonList
            question.ID = "question" & i

            question.Items.Insert(0, new listitem("", "1"))
            question.Items.Insert(1, new listitem("", "2"))
            TableRowCell_1.Controls.Add(question)

        Next

End Sub

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Author Comment

by:bchambers233
ID: 34968929
OK... just spotted a schoolboy error (totally unrelated to the problem I'm asking about but worth highlighting)

First set of code submitted...
Line25 should be
Response.Write(rblCount & " - " & total & " - " & (total / rblCount))

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Accepted Solution

by:
bchambers233 earned 0 total points
ID: 34968947
I got it,

For Each row As TableRow In Me.holidayQuestionnaireTable.Rows
     For Each cell As TableCell In row.Cells
         For Each ctrl As Control In cell.Controls
             If TypeOf ctrl Is RadioButtonList Then
                Dim rbl As RadioButtonList = DirectCast(ctrl, RadioButtonList)
                If rbl.SelectedIndex <> -1 AndAlso rbl.ID <> "question18" Then
                   Dim value As Int32 = Int32.Parse(rbl.SelectedValue)
                   total += value
                   rblCount += 1 'count only the selected RadiobuttonLists'
                End If
             End If
         Next
    Next
Next

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Author Closing Comment

by:bchambers233
ID: 35005090
I got the answer from another source.
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