Random number generator freezing

[phieagles76]

Hello,
I'm working on a sudoku type game with 4x4 squares rather than the typical 9x9 and I have written code to generate a random number for each button when new game is clicked the problem is it will generate 1 to 4 boards and then it freezes up I'm sure itis getting stuck in the loop but I just don't understand why it's freezing. Here is the code I wrote:

Private Sub newgme_clk(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button23.Click

        Dim randomnum(15) As Integer
        Dim i As Integer


        Randomize()
        randomnum(0) = CInt(Int(Rnd() * 4 + 1))


restartnumber2:
        For i = 1 To 4

            Randomize()
            randomnum(1) = CInt(Int(Rnd() * 4 + 1))
            If randomnum(1) = randomnum(0) Then
                GoTo restartnumber2
            End If
        Next

restartnumber3:
        For i = 1 To 4

            Randomize()
            randomnum(2) = CInt(Int(Rnd() * 4 + 1))
            If randomnum(2) = randomnum(0) Or randomnum(2) = randomnum(1) Then
                GoTo restartnumber3
            End If
        Next

restartnumber4:
        For i = 1 To 4

            Randomize()
            randomnum(3) = CInt(Int(Rnd() * 4 + 1))
            If randomnum(3) = randomnum(0) Or randomnum(3) = randomnum(1) Or randomnum(3) = randomnum(2) Then
                GoTo restartnumber4
            End If
        Next

restartnumber5:
        For i = 1 To 4

            Randomize()
            randomnum(4) = CInt(Int(Rnd() * 4 + 1))
            If randomnum(4) = randomnum(0) Or randomnum(4) = randomnum(1) Then
                GoTo restartnumber5
            End If
        Next

restartnumber6:
        For i = 1 To 4

            Randomize()
            randomnum(5) = CInt(Int(Rnd() * 4 + 1))
            If randomnum(5) = randomnum(0) Or randomnum(5) = randomnum(1) Or randomnum(5) = randomnum(4) Then
                GoTo restartnumber6
            End If
        Next


restartnumber7:
        For i = 1 To 4

            Randomize()
            randomnum(6) = CInt(Int(Rnd() * 4 + 1))
            If randomnum(6) = randomnum(2) Or randomnum(6) = randomnum(3) Or randomnum(6) = randomnum(4) Or randomnum(6) = randomnum(5) Then
                GoTo restartnumber7
            End If
        Next


restartnumber8:
        For i = 1 To 4

            Randomize()
            randomnum(7) = CInt(Int(Rnd() * 4 + 1))
            If randomnum(7) = randomnum(2) Or randomnum(7) = randomnum(3) Or randomnum(7) = randomnum(4) Or randomnum(7) = randomnum(5) Or randomnum(7) = randomnum(6) Then
                GoTo restartnumber8
            End If
        Next


restartnumber9:
        For i = 1 To 4

            Randomize()
            randomnum(8) = CInt(Int(Rnd() * 4 + 1))
            If randomnum(8) = randomnum(0) Or randomnum(8) = randomnum(4) Then
                GoTo restartnumber9
            End If
        Next


restartnumber10:
        For i = 1 To 4

            Randomize()
            randomnum(9) = CInt(Int(Rnd() * 4 + 1))
            If randomnum(9) = randomnum(1) Or randomnum(9) = randomnum(5) Or randomnum(9) = randomnum(8) Then
                GoTo restartnumber10
            End If
        Next




restartnumber11:
        For i = 1 To 4
            Rnd(-1)
            Randomize()
            randomnum(10) = CInt(Int(Rnd() * 4 + 1))
            If randomnum(10) = randomnum(2) Or randomnum(10) = randomnum(6) Or randomnum(10) = randomnum(8) Or randomnum(10) = randomnum(9) Then
                GoTo restartnumber11
            End If
        Next


restartnumber12:
        For i = 1 To 4
            Rnd(-1)
            Randomize()
            randomnum(11) = CInt(Int(Rnd() * 4 + 1))
            If randomnum(11) = randomnum(3) Or randomnum(11) = randomnum(7) Or randomnum(11) = randomnum(8) Or randomnum(11) = randomnum(9) Or randomnum(11) = randomnum(10) Then
                GoTo restartnumber12
            End If
        Next


restartnumber13:
        For i = 1 To 4
            Rnd(-1)
            Randomize()
            randomnum(12) = CInt(Int(Rnd() * 4 + 1))
            If randomnum(12) = randomnum(0) Or randomnum(12) = randomnum(4) Or randomnum(12) = randomnum(8) Or randomnum(12) = randomnum(9) Then
                GoTo restartnumber13
            End If
        Next

restartnumber14:
        For i = 1 To 4
            Rnd(-1)
            Randomize()
            randomnum(13) = CInt(Int(Rnd() * 4 + 1))
            If randomnum(13) = randomnum(1) Or randomnum(13) = randomnum(5) Or randomnum(13) = randomnum(9) Or randomnum(13) = randomnum(8) Or randomnum(13) = randomnum(12) Then
                GoTo restartnumber14
            End If
        Next


restartnumber15:
        For i = 1 To 4
            Rnd(-1)
            Randomize()
            randomnum(14) = CInt(Int(Rnd() * 4 + 1))
            If randomnum(14) = randomnum(2) Or randomnum(14) = randomnum(6) Or randomnum(14) = randomnum(10) Or randomnum(14) = randomnum(11) Or randomnum(14) = randomnum(12) Or randomnum(14) = randomnum(13) Then
                GoTo restartnumber15
            End If
        Next


restartnumber16:
        For i = 1 To 4
            Rnd(-1)
            Randomize()
            randomnum(15) = CInt(Int(Rnd() * 4 + 1))
            If randomnum(15) = randomnum(3) Or randomnum(15) = randomnum(7) Or randomnum(15) = randomnum(11) Or randomnum(15) = randomnum(12) Or randomnum(15) = randomnum(13) Or randomnum(15) = randomnum(14) Then
                GoTo restartnumber16
            End If
        Next




        Button1.Text = randomnum(0)
        Button2.Text = randomnum(1)
        Button3.Text = randomnum(2)
        Button4.Text = randomnum(3)
        Button5.Text = randomnum(4)
        Button6.Text = randomnum(5)
        Button7.Text = randomnum(6)
        Button8.Text = randomnum(7)
        Button9.Text = randomnum(8)
        Button10.Text = randomnum(9)
        Button11.Text = randomnum(10)
        Button12.Text = randomnum(11)
        Button13.Text = randomnum(12)
        Button14.Text = randomnum(13)
        Button15.Text = randomnum(14)
        Button16.Text = randomnum(15)




    End Sub
End Class

I have tried changing the randomnum(15) to a long and a byte as well as a single data
type and it hasn't made a difference. the other difference that I noticed was that by adding Rnd(-1) before the randomize() on the last few loops helped but it's still freezing up. Thanks for any help.

[arthurinvisible]

it seems to me that you are right it is getting stuck in a loop probably on random number six or seven, because your random number is between one and five and when you get to those loops the numbers are all taken up and it just keeps repeating the loop so that number <> to any previous random numbers

Get rid of those gotos and use loops! what you have so far is hideous! NO

[phieagles76]

Get rid of those gotos and use loops! what you have so far is hideous! NO

It would be great if you could elaborate for me please. I'm slightly confused on what your saying. I'm new to VB and I was under the impression that I was using a loop.

[sarifin]

Hello:

I was just going through your problem.

Are you able to solve your freezing problem? If not, i will look further towards the solution.

Thanks.

[phieagles76]

Hello:

I was just going through your problem.

Are you able to solve your freezing problem? If not, i will look further towards the solution.

Thanks.

No I still haven't been able to figure it out thanks for your assistance.I really appreciate it I really just want to know why it doesn't work it seems like it should.