Displaying Excel Documents

The ImGearExcelBookDocument and ImGearExcelSheetDocument objects can be created and processed in any thread with any apartment state: STA or MTA. If they also need to be displayed, then there are some concepts which should be taken into account:

• In WPF display scale mode the calling thread must use the STA apartment state, which is a requirement of Windows Presentation Foundation. ImageGear will create a WPF Canvas in the context of this calling thread to render the document pages for display.
• In Native display scale mode, which is the default for ImageGear, there are no restrictions for displaying Excel pages in a multithreaded environment.