Nevron Open Vision Documentation
Nevron.Nov.Dom Namespace / NElement Class / OnFxChanging Method
data for the change

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    OnFxChanging Method
    In This Topic
    Called when the expression associated with a property is changing
    Protected Overridable Function OnFxChanging( _
       ByVal data As NExpressionChangeData _
    ) As System.Boolean
    Dim instance As NElement
    Dim data As NExpressionChangeData
    Dim value As System.Boolean
    value = instance.OnFxChanging(data)
    protected virtual System.bool OnFxChanging( 
       NExpressionChangeData data


    data for the change

    Return Value

    true if the change is acceptable, otherwise false
    This implementation notifies static and dynamic observers about the expected expression change. Both types of observers can cancel the change.

    Target Platforms: Windows 11, Windows 10, Windows 7, Windows Server 2019, Windows Server 2016, Windows Server 2012 R2, Windows Server 2012, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later)

    See Also