Controlled Application View Printing Event

public event EventHandler<ViewPrintingEventArgs> ViewPrinting

Public Event ViewPrinting As EventHandler(Of ViewPrintingEventArgs)

public:
 event EventHandler<ViewPrintingEventArgs^>^ ViewPrinting {
	void add (EventHandler<ViewPrintingEventArgs^>^ value);
	void remove (EventHandler<ViewPrintingEventArgs^>^ value);
}

member ViewPrinting : IEvent<EventHandler<ViewPrintingEventArgs>,
    ViewPrintingEventArgs>

Value

This event is raised when Revit is just about to print a view of the document. If multiple views are combined to a single file, this event will be raised only once.

Handlers of this event are permitted to make modifications to any document (including the active document), except for documents that are currently in read-only mode.

Event is not cancellable. The 'Cancellable' property of event's argument is always False.

The following API functions are not available for the current document during this event:

• All overloads of Autodesk.Revit.DB.Document.Export()
• Autodesk.Revit.DB.Document.Print()
• Print and similar overloads.
• SubmitPrint and similar overloads.
• Close and similar overloads.
• Save .
• SaveAs(String) and similar overloads.

Exception InvalidOperationException will be thrown if any of the above methods is called during this event.

Another event ViewPrinted will be raised immediately after view printing is finished.

Reference