これにより、数字と大文字/小文字を含む 2 つのランダムな文字の組み合わせが生成されます。
Public Function GetRandomString(ByVal iLength As Integer) As String
Dim sResult As String = ""
Dim rdm As New Random()
For i As Integer = 1 To iLength
sResult &= ChrW(rdm.Next(32, 126))
Next
Return sResult
End Function
または、有効な文字を定義する一般的なランダム文字列を実行できます。
Public Function GenerateRandomString(ByRef iLength As Integer) As String
Dim rdm As New Random()
Dim allowChrs() As Char = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLOMNOPQRSTUVWXYZ0123456789".ToCharArray()
Dim sResult As String = ""
For i As Integer = 0 To iLength - 1
sResult += allowChrs(rdm.Next(0, allowChrs.Length))
Next
Return sResult
End Function