Random Number Generator | Visual Basic.Net Snippet


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Visual Basic.Net

Mathematics

Random Number Generator

Viewed: 4344

Version: Framework 2.0

Function that reurns a random non-repeating integer

Import/Using Directives

None

Public Function RandomNumber(ByVal MaxNumber As Integer, _
       Optional ByVal MinNumber As Integer = 0) As Integer
        'initialize random number generator with the random Class
        Dim r As New random(System.DateTime.Now.Millisecond)
        Dim myNewRandomNum As Integer = 0
        Dim blnNewNum As Boolean = False
        Do
            ' get the random number here
            myNewRandomNum = r.Next(MinNumber, MaxNumber)
            If Not random(myNewRandomNum) Then
                'if it's not true at this position, make it true
                random(myNewRandomNum) = True
                ' set flag to exit the loop
                blnNewNum = True
            End If

        Loop Until blnNewNum = True
        ' now we have new non repeating index position
        Return myNewRandomNum

    End Function

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