Suggestion for storing selected radiobutton into database - database

Question

I have create multiple choice system where the user need to choose answer from 4 radiobutton before navigate to next question by clicking next button.
So, the I have problem in storing the selected radiobutton into database. At first I create a table where I create columns to store each answer but it failed. Now, I'm stuck. Please give any suggestion where i can store the answer.
Here I provide the code to load the question
p/s: I know i should ask this on different thread but I also stuck on how to randomize the radiobutton.
Public Property Counter() As Integer
Get
Return IIf(ViewState("counter") Is Nothing, 1, CInt(ViewState("counter")))
End Get
Set(ByVal value As Integer
ViewState("counter") = value
End Set
End Property
Protected Sub Next_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
Counter += 1
question()
clean()
End Sub
Sub question()
conn.Open()
Dim cmd As New SqlCommand("Select * From ques Where Id=#Id", conn)
cmd.Parameters.AddWithValue("#Id", Counter)
Dim dr1 As SqlDataReader
dr1 = cmd.ExecuteReader
If dr1.Read() Then
Me.lblquestion.Text = dr1("question")
Me.RadioButton1.Text = dr1("right")
Me.RadioButton2.Text = dr1("wrong")
Me.RadioButton3.Text = dr1("wrong2")
Me.RadioButton4.Text = dr1("wrong3")
Else
conn.Close()
Counter += 1
question()
End If
conn.Close()
End Sub
Sub clean()
RadioButton1.Checked = False
RadioButton2.Checked = False
RadioButton3.Checked = False
RadioButton4.Checked = False
Next.Enabled = False
End Sub
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
question()
End Sub
Protected Sub RadioButton1_CheckedChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles RadioButton1.CheckedChanged
Next.Enabled = True
End Sub
Protected Sub RadioButton2_CheckedChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles RadioButton2.CheckedChanged
Next.Enabled = True
End Sub
Protected Sub RadioButton3_CheckedChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles RadioButton3.CheckedChanged
Next.Enabled = True
End Sub
Protected Sub RadioButton4_CheckedChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles RadioButton4.CheckedChanged
Next.Enabled = True
End Sub
End Class

Answer 1

I would have a database structure like this:
TblQuizes
Quiz_Id int
Quiz_Name nvarchar(200) -- or any other number that meets your demands
TblQuestions
Question_Id int
Question_Quiz_Id int --(FK To TblQuizes)
Question_Text nvarchar(200) -- or any other number that meets your demands
TblAnswers
Answer_Id int
Answer_Question_Id int --(FK To TblQuestions)
Answer_Text nvarchar(200) -- or any other number that meets your demands
Answer_IsCorrect bit
TblResults
Result_Id int
Result_Quiz_Id int -- (FK to TblQuizes) (not even needed, just to convenience)
-- Add user data in this table if you need it
TblResultDetails
ResultDetails_Id int
ResultDetails_Result_Id int --(FK to TblResults)
ResultDetails_Answer_Id int (FK to TblAnswers)
Now what I would do is create a new record in TblResults for every user that answers the quiz, and store the users answers in TblResultDetails.
On this basic structure you can create views to give you the entire data you need to show the quiz to the user, or to show him how well he answered your questions, and so on. you can also see very easily if a user did not complete the quiz, just by comparing the number of records in TblQuetions and TblResultDetails for a specific quiz id.
Also, if you ever want to have questions with only 2 answer, or 6 answers, you don't have to change anything in the database structure or in your code to have that.