How to match the answer in vb.net and asp.net? - asp.net

Question

I random the 3 question to display on asp.net page. I want to match the security question with correct answer in database. But after I enter the correct answer in textbox and click the "Next" button, the answer cannot match the current question displayed on screen. But if I click the "Next" button, the next question displayed is matched with answer I enter on textbox in previous question. I think this is because the answer is match the question and answer after refresh the page. Please help. Here is my code. thanks
vb.net code
Dim SecurityQuestion As New DBDataContext
Dim randomNumber As Integer
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim SecurityQuestion As New DBDataContext
Dim rowCount As Integer = (From t In SecurityQuestion.tblSecurityQuestions Select t).Count + 1
End Sub
Protected Sub btnNext_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnNext.Click
ValidateAnswer()
End Sub
Private Sub LoadSecurityQuestion()
Dim SecurityQuestion As New DBDataContext
Dim mySecurityQuestion = (From c In SecurityQuestion.tblSecurityQuestions Where c.PkID = randomNumber Select c)
Dim rowCount As Integer = (From t In SecurityQuestion.tblSecurityQuestions Select t).Count + 1
randomNumber = New Random().Next(1, rowCount)
With gvQuestion
.DataSource = mySecurityQuestion
.DataBind()
End With
End Sub
Private Sub ValidateAnswer()
Dim SecurityQuestion As New DBDataContext
Dim validate = (From r In SecurityQuestion.tblRegistrations From s In SecurityQuestion.tblSecurityQuestions _
Where s.PkID = r.Q01 And r.A01 = txtSecurityAns.Text And r.UserID = ad And s.PkID = randomNumber _
Select r)
If validate.Count > 0 Then
Msg3.Text = "Correct Answer"
Else
Msg3.Text = "Invalid Answer"
End If
End Sub

Answer 1

At the time I posted this answer, it looked like a small bit of your code might have been missing. As an example, I couldn't see where you were actually calling the method LoadSecurityQuestion, but it sounds like you may be acidentally re-calling the method LoadSecurityQuestion even after validation succeeds.
I think you can fix this problem by wrapping your call to LoadSecurityQuestion with an "if" qualifier. As an example, lets suppose that you were calling LoadSecurityQuestion in your Load Event handler. If you did that, your new Load event handler might read something like this:
Protected Sub Page_Load(sender As Object, e As System.EventArgs) Handles Me.Load
...
If IsPostBack Then
' If you wrap all of your Me.LoadSecurityQuestion calls
' with "If" statements like this one, then it should keep
' the security question from changing when the user
' enters the correct answer
If Msg3.Text <> "Correct Answer" Then
Me.LoadSecurityQuestion()
End If
End If
...
End Sub