PdfViewer.AnnotationChanging Event

Fires before the annotation is changed.

Namespace: DevExpress.XtraPdfViewer

Assembly: DevExpress.XtraPdfViewer.v23.2.dll

NuGet Package: DevExpress.Win.PdfViewer

Declaration

C#

public event PdfAnnotationChangingEventHandler AnnotationChanging

VB.NET

Public Event AnnotationChanging As PdfAnnotationChangingEventHandler

Event Data

The AnnotationChanging event's data class is PdfAnnotationChangingEventArgs. The following properties provide information specific to this event:

Property	Description
Cancel	Gets or sets a value indicating whether the event should be canceled. Inherited from CancelEventArgs.
NewAnnotation	Returns an annotation’s new property values.
OldAnnotation	Returns an annotation’s previous property values.

Remarks

The code sample below prohibits changing annotations of a specific author:

C#

using DevExpress.XtraPdfViewer;

private void PdfViewer_AnnotationChanging(object sender, PdfAnnotationChangingEventArgs e)
{
    if (e.OldAnnotation.Author == "Cardle Anita L") { e.Cancel = true; }
}

VB.NET

Imports DevExpress.XtraPdfViewer

Private Sub PdfViewer_AnnotationChanging(ByVal sender As Object, ByVal e As PdfAnnotationChangingEventArgs)
  If e.OldAnnotation.Author = "Cardle Anita L" Then
    e.Cancel = True
  End If
End Sub