StandardPrintController.OnStartPage(PrintDocument document, PrintPageEventArgs e) is slow

Question

What factors will affect the performance of OnStartPage(PrintDocument document, PrintPageEventArgs e) method?

Answer 1

@JAYLON LIU , based on my research, the Microsoft doc StandardPrintController.OnStartPage(PrintDocument, PrintPageEventArgs) Method has the following remarks.

OnStartPage is called immediately before PrintDocument raises the PrintPage event.

OnStartPrint creates the Graphics object used in printing. After OnStartPrint is called, the OnStartPage method sets the Graphics object to a graphic of a single page. The OnEndPage method clears the Graphics object, while the OnEndPrint method deallocates the object.

From the above description, we can know the following factors can affect the performace.

First, If the Graphics is too large, it will spend more time on creating the Graphics object and clearing the Graphics objects.

Second, If there are many pages, it will also occupy many time because it needs to set the Graphics object to a graphic of a single page. It means that it will be in a loop.

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