RadioButton does not show up when inside a panel within a panel - sql-server

Question

This is my first question ever, so please spare me if I did something wrong.
I have a small survey form that automatically draw questions and answers from a SQL server table, and create a question label (Label_Questionnaire(i)), a panel to nest all radiobuttons for the answer of each question (Panel_Response(i)), and 3 radiobuttons(yes, no, n/a), named RadioButton_Answers(i)_1 . All questions and answers are inside a big panel (Panel_Survey) to allow user to scroll up and down (around 50 questions).
When I run the program, I can only see questions but none of the radiobuttons are showing. What I did try are:
Use .BringToFront to bring the Panel_Response and all radiobuttons to front.
Change .Parent to Controls.Add . Instead of using .Parent, I use Panel_Survey.Controls.Add(Panel_Response) and Panel_Response.Controls.Add(RadioButton_Answers_1)
Force Panel_Response.Visible = True and all radiobuttons visible = true
(I know it might sound stupid, but I'm out of trick)
How do I make those radiobuttons show up? If not, are there any better designs for this kind of survey form? Thank you for any advice, in advance!
Below is my code:
Protected Overrides Sub OnLoad(e As EventArgs)
Dim PanelCount As Integer
Dim QuestionName As String
Dim Response1 As String
Dim Response2 As String
Dim Response3 As String
Dim InitialX As Integer = Panel_Survey.Left
Dim InitialY As Integer = Panel_Survey.Top
Dim SizeX As Integer = 1000
Dim SizeY As Integer = 25
'Load the survey
Try
'Get a list of questions and answers into array of list
Dim ListofQuestionandAnswers As New List(Of List(Of String))
Dim conn As New SqlClient.SqlConnection
conn.ConnectionString = ConnectionString
Dim CommandString As String = "SELECT [QuestionID], [QuestionName] ,[Response1],[Response2],[Response3] FROM [Question_List] ORDER BY [QuestionID]"
Dim Command As New SqlClient.SqlCommand
Command.CommandText = CommandString
Command.Connection = conn
Dim dr As SqlClient.SqlDataReader
conn.Open()
dr = Command.ExecuteReader
While dr.Read
Dim ls As New List(Of String)
ls.Add(dr.GetValue(0).ToString)
ls.Add(dr.GetValue(1).ToString)
ls.Add(dr.GetValue(2).ToString)
ls.Add(dr.GetValue(3).ToString)
ls.Add(dr.GetValue(4).ToString)
ListofQuestionandAnswers.Add(ls)
End While
conn.Close()
PanelCount = ListofQuestionandAnswers.Count
For i = 0 To ListofQuestionandAnswers.Count - 1
QuestionName = ListofQuestionandAnswers(i)(1)
Response1 = ListofQuestionandAnswers(i)(2)
Response2 = ListofQuestionandAnswers(i)(3)
Response3 = ListofQuestionandAnswers(i)(4)
Dim Label_Questionnaire As New Label
Dim Panel_Response As New Panel
Dim RadioButton_Answers_1 As New RadioButton
Dim RadioButton_Answers_2 As New RadioButton
Dim RadioButton_Answers_3 As New RadioButton
'Condition the label
With Label_Questionnaire
.Parent = Panel_Survey
.Name = "Label_Questionnaire" + i.ToString
.Font = New Font("Calibri", 11, FontStyle.Regular)
.Text = QuestionName
.ForeColor = Color.Black
.Location = New Point(InitialX, InitialY)
.AutoSize = True
End With
'Condition the panel
With Panel_Response
'Panel_Survey.Controls.Add(Panel_Response)
.Parent = Panel_Survey
.Name = "Panel_Questionnaire" + i.ToString
.Location = New Point(InitialX + 880, InitialY)
.Width = 250
.Height = 25
.BringToFront()
End With
Dim j As Integer
Dim h As Integer
j = Panel_Response.Left
h = Panel_Response.Top
'Condition the radiobuttons for answers
With RadioButton_Answers_1
.Parent = Panel_Response
.Name = "RadioButton_Answers" + i.ToString + "_1"
.Font = New Font("Calibri", 11, FontStyle.Regular)
.Text = Response1
.ForeColor = Color.Black
.Location = New Point(j, h)
.AutoSize = True
h += RadioButton_Answers_1.Height
End With
With RadioButton_Answers_2
.Parent = Panel_Response
.Name = "RadioButton_Answers" + i.ToString + "_2"
.Font = New Font("Calibri", 11, FontStyle.Regular)
.Text = Response2
.ForeColor = Color.Black
.Location = New Point(RadioButton_Answers_1.Right, h)
.AutoSize = True
End With
With RadioButton_Answers_3
.Parent = Panel_Response
.Name = "RadioButton_Answers" + i.ToString + "_3"
.Font = New Font("Calibri", 11, FontStyle.Regular)
.Text = Response3
.ForeColor = Color.Black
.Location = New Point(RadioButton_Answers_2.Right, h)
.AutoSize = True
End With
InitialY = InitialY + SizeY + 10
Next
Catch ex As Exception
MessageBox.Show(String.Format("Error: {0}", ex.Message), "Error while creating questions and answers", MessageBoxButtons.OK, MessageBoxIcon.Error)
End Try
End Sub

Answer 1

Few basic problems here:
You seem to assume that when a control is placed inside a panel, it must be placed at a location relative to the form. It doesn't; it places relative to the Panel which has its own coordinate system starting at 0,0 in the top left of the panel - you initialize j and h (for locations of the radio buttons) to the Left and Top of the panel they're in, but they should be inited to 0,0 if you want the radiobuttons to start at the top left of the panel. If the Panel is placed at 300,300 on a form, and you place a radiobutton inside the panel also at 300,300 (because you copied its left and top) then the radio button will look like it's at 600,600 on the form because its at 300,300 inside a panel that is at 300,300
You only make your panel 250 wide - it's barely wide enough to show a single radio button
You increment h once, by an amount that means the next radiobutton disappears off the bottom of the panel (which is 25 pixels high)
Here:
With Panel_Response
'Panel_Survey.Controls.Add(Panel_Response)
.Parent = Panel_Survey
.Name = "Panel_Questionnaire" + i.ToString
.Location = New Point(InitialX + 880, InitialY)
.Width = 2500
.Height = 25
.BringToFront()
.BackColor = Color.Red
End With
Dim j As Integer
Dim h As Integer
j = 0
h = 0
Paste that over your app code and run it again. I made the panel BackColor red so you can more easily see where the panel is
I guess you need to decide how you want your UI to look. If the radiobuttons are laid out vertically, don't increment X when you add them to the panel (by setting the parent property). Make the panel tall enough to accommodate them (25 px not enough)
Use a FlowLayoutPaanel or TableLayoutPanel instead