How to random array without repeat in VB.net?

Question

Dim r As New Random
Dim A(2) As String
A(0) = "A"
A(1) = "B"
A(2) = "C"
MsgBox(A(r.Next(0,3)) & "," & A(r.Next(0,3)) & "," & A(r.Next(0,3)))

I want to see in the result one of the following rows:

A,B,C
A,C,B
C,B,A
C,A,B
B,A,C
B,C,A

You need to shuffle the array then access each element one at a time, or just use String.Join() — Shar1er80
– Shar1er80, Commented Jun 5, 2015 at 11:39

Zohar Peled · Accepted Answer · 2015-06-05 11:41:07Z

2

Sort the array in a random order and then go to 0, 1, 2.

Dim r As New Random
Dim A(2) As String
A(0) = "A"
A(1) = "B"
A(2) = "C"

A = A.OrderBy(Function() r.Next).ToArray()

MsgBox(A(0) & "," & A(1) & "," & A(2)

edited Jun 5, 2015 at 11:41

answered Jun 5, 2015 at 11:38

Zohar Peled

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2 Comments

Keith Mifsud Over a year ago

you need to have it being A = A.OrderBy(Function() rnd.Next)

Zohar Peled Over a year ago

@SophairkChhoiy: if an answer solved your problem you should accept it so that other people will know the problem is solved.

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