[Solved] Visual Basic Textbox Content Restrictions [closed]

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To check if a string contains at least one upper character, one lower character and one number, you can use the Char.IsUpper / IsLower / IsNumber methods.

Private Function IsValidPasswordFormat(ByVal text As String) As Boolean
    If String.IsNullOrEmpty(text) Then
        Return False
    End If

    If text.Any(Function(c) Char.IsUpper(c)) AndAlso
        text.Any(Function(c) Char.IsLower(c)) AndAlso
        text.Any(Function(c) Char.IsNumber(c)) Then
        Return True
    End If

    Return False
End Function

solved Visual Basic Textbox Content Restrictions [closed]