PdfViewerAnnotationExtensions Class

Defines extension methods for the IPdfViewerAnnotation interface.

Namespace: DevExpress.Pdf

Assembly: DevExpress.Pdf.v21.1.Drawing.dll

NuGet Package: DevExpress.Pdf.Drawing

Declaration

C#

public static class PdfViewerAnnotationExtensions

VB.NET

Public Module PdfViewerAnnotationExtensions

Remarks

The PdfViewerAnnotationExtensions class methods allow you to retrieve options for specific annotation types when the following events fire:

• AnnotationCreated
• AnnotationChanged
• AnnotationDeleting
• AnnotationDeleted
• AnnotationGotFocus
• AnnotationLostFocus

The code sample below calls the PdfMarkupAnnotationDataExtensions.AsTextMarkupAnnotation method to retrieve text markup annotation options in the AnnotationDeleting event handler:

C#

private void PdfViewer_AnnotationDeleting(object sender, PdfAnnotationDeletingEventArgs e)
{
    if (e.Annotation.Type == PdfAnnotationType.TextMarkup)
    {
        IPdfViewerTextMarkupAnnotation annotation =
        e.Annotation.AsTextMarkupAnnotation();
        if (annotation.Style == PdfTextMarkupAnnotationType.StrikeOut)
            e.Cancel = true;
    }
}

VB.NET

Private Sub PdfViewer_AnnotationDeleting(ByVal sender As Object, ByVal e As PdfAnnotationDeletingEventArgs)
    If e.Annotation.Type = PdfAnnotationType.TextMarkup Then
        Dim annotation As IPdfViewerTextMarkupAnnotation =
        e.Annotation.AsTextMarkupAnnotation()
        If annotation.Style = PdfTextMarkupAnnotationType.StrikeOut Then e.Cancel = True
    End If
End Sub

Inheritance

Object

PdfViewerAnnotationExtensions