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 End-User Documentation

PdfViewer.FileAttachmentOpening Event

Occurs when an attachment is opening in the Attachments panel and allows you to manage the attachment opening behavior. For example, the attachment contents are not opened if e.Cancel is set to true. If you want to hide the Security Warning message box, set the PdfFileAttachmentOpeningEventArgs.Handled property to true.

Namespace:DevExpress.XtraPdfViewer
Assembly:DevExpress.XtraPdfViewer.v17.2.dll

Expanded Syntax

Expanded Event Data

The event handler receives an argument of type PdfFileAttachmentOpeningEventArgs containing data related to this event.

The following PdfFileAttachmentOpeningEventArgs properties provide information specific to this event.
Property Description
Cancel Gets or sets a value indicating whether the event should be canceled.
FileAttachment Gets the file attachment stored in the Attachments tab of the PDF Viewer.
Handled Gets or sets a value that specifies whether the FileAttachmentOpening event is handled; if handled, the Security Warning message box is hidden.

Expanded Remarks

The following image illustrates a security warning displayed in a PDF Viewer when clicking either the “Open file in its native application” icon or double-clicking the attachment in the Attachments tab.

Expanded See Also

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