vb.net - Check if integer is valid bitwise enum value

Question

is there a way to check if an integer is a valid value for an enum even if the value is bitwise?

Example:

  Public Enum eFlags As Integer
    None = 0
    First = 1
    Second = 2
    Third = 4
  End Enum

  Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    Dim x As eFlags = eFlags.Second Or eFlags.Third
    Dim y As Integer = 5

    Dim res = x.GetType.IsEnum AndAlso [Enum].IsDefined(x.GetType, y)
  End Sub

This returns false. I want to set the value of a property using reflection where the property is an enum and the value is integer...

question from:https://stackoverflow.com/questions/65897772/check-if-integer-is-valid-bitwise-enum-value

Answer 1

Maybe this will help

<Flags> Public Enum eFlags As Integer
    None = 0
    First = 1
    Second = 2
    Third = 4

    'note: flags added above will have to be Or'ed in All
    All = First Or Second Or Third '<<<<<<<<<
End Enum

 Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        Dim x As Integer = 14

        For y As Integer = 6 To 13
            Dim res As eFlags = CType(x And y, eFlags)

            If eFlags.All.HasFlag(res) Then
                Stop
            Else
                Stop
            End If
        Next
    End Sub