问题
When I am looping through each page I need to decide the size of a page and choose what size to print it in. is there an easy way to determine what size they are suppose to be? right now i was going by the ratio of width and height. If ratio >= 1.64 && ratio <= 1.65 Then Legal Size, If ratio >= 1.29 && ratio <= 1.30 The Letter Size. but how about if they are printing other sizes do i have to do this for each one?
回答1:
There are several different things that can be considered the "size of a page": PrintDocument.DefaultPageSettings is the default page settings from the printer driver. To determine "what size to print" I suggest using PrintDocument.DefaultPageSettings.PrintableArea.Size rather than the aspect ratio.
If you display a print controller this can be overridden on each page; use the PrintPage event's PrintPageEventArgs.PageSettings.PrintableArea.Size.
来源：https://stackoverflow.com/questions/2143210/choosing-correct-papersize-when-printing-with-net-printdocument