Reference programmatically created radiobuttonlist selection

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  11 years ago

  by janetb

  janetb

  , United States

  Joined 15 years ago

  I don't know until the page is created how many radiobuttonlists I will need. So, I create them and store the number in a hidden label. But, when I want to get the selection from the radiobuttonlist on postback, I keep getting a object reference error. I've tried finding the control without a findControl, with a findControl and with a master page content reference and findControl. No luck. Any help appreciated...

                  Dim myConStr As String = ""
                  If lblSidCount.Text <> "0" Then
                      Dim x As Integer = 1, y As Integer = Convert.ToInt32(lblSidCount.Text)
                      Do While x <= y
                          Dim myContent As ContentPlaceHolder = CType(Page.Master.FindControl("ContentPlaceHolder1"), ContentPlaceHolder)
                          Dim radConStr As New RadioButtonList
                          radConStr = CType(myContent.FindControl("rad" & x.ToString), RadioButtonList)
                          myConStr &= radConStr.SelectedItem.Text & "~"
                          x = x + 1
                      Loop
                      myConStr = Left(myConStr, Len(myConStr) - 1)
                  End If
  

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• • Reply

  11 years ago

  by janetb

  janetb

  , United States

  Joined 15 years ago

  This seems to work - am I crazy for doing this?

      Private radCon As RadioButtonList()
      Protected Overrides Sub OnInit(ByVal e As EventArgs)
          MyBase.OnInit(e)
          If (Request("str") = 1) Then
              Dim myList As dsSql = New dsSql()   ''''instantiate the function to get dataset
              Dim ds As New Data.DataSet
              ds = myList.dsConSessionTimes(Request("eid"))
              If ds.Tables("conSessionTimes").Rows.Count > 0 Then
                  radCon = New RadioButtonList(ds.Tables("conSessionTimes").Rows.Count - 1) {}
                  Dim i As Integer = 0
                      Dim rad As RadioButtonList = New RadioButtonList()
                      rad.ID = "rad" + i.ToString()
                      rad.DataSource = ds.Tables("conSessions")
                      rad.DataTextField = ds.Tables("conSessions").Columns("session_name").ToString
                      rad.DataBind()
                      rad.SelectedIndex = 0
                      phConcurrent.Controls.Add(rad)
                      radCon(i) = rad
                  For Each j As Data.DataRow In ds.Tables("conSessionTimes").Rows
                      Dim rad As RadioButtonList = New RadioButtonList()
                      rad.ID = "rad" + i.ToString()
                      rad.DataSource = ds.Tables("conSessions")
                      rad.DataTextField = ds.Tables("conSessions").Columns("session_name").ToString
                      rad.DataBind()
                      rad.SelectedIndex = 0
                      phConcurrent.Controls.Add(rad)
                      radCon(i) = rad
                      i = i + 1
                  Next
              End If
          End If
      End Sub
  

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