MS Access更新值为NULL

Question

I have the following code on fieldApplicationType

Private Sub fieldApplicationType_AfterUpdate()
    If (Me.fieldApplicationType.Value = 200 Or Me.fieldApplicationType.Value = 300) Then
        Me.fieldPrimaryBusinessFunction.Enabled = True
    Else
        Me.fieldPrimaryBusinessFunction.Enabled = False
    End If
End Sub

What I want to be able to do is in the Else not only do I want to disable the field (which is working) I also want to set the Value to NULL if it isn't currently already NULL.

Doing Me.fieldPrimaryBusinessFunction.Value = Null is not changing anything however. fieldPrimaryBusinessFunction is a ComboBox.

The Row Source for the ComboBox are coming from a view and Limit To List is Yes along with Allow Value List Edits

Answer 1

Have you tried:

Me.fieldPrimaryBusinessFunction.Value = Me.fieldPrimaryBusinessFunction.DefaultValue

That's assuming your default value is null.