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Compare PDF files in Xamarin
This tutorial only applies to Xamarin.iOS. See Xamarin.Android equivalent here .
The Apryse SDK provides powerful file comparison functionality. An example of this capability is shown below by comparing two PDF pages and highlighting the difference between them in red.
| File 1 | File 2 | Difference |
|---|---|---|
 |  |  |
Show a file comparison view controller
The PTDiffViewController class shows a control to select two documents and create a new file showing the visual difference between them with
customizable colors.
The file comparison control is part of the Tools library, so make sure you have added the Tools library to your project .
// Initialize a file comparison view controller.
var diffController = new PTDiffViewController();
diffController.DidCreateDiffFileAtURL += (sender, e) =>
{
// Handle created diff file.
};
var navigationController = new UINavigationController(diffController);
if (!UserInterfaceIdiomIsPhone)
{
navigationController.ModalPresentationStyle = UIModalPresentationStyle.Popover;
navigationController.PopoverPresentationController.SourceView = btn;
navigationController.PopoverPresentationController.SourceRect = btn.Bounds;
}
this.PresentViewController(navigationController, true, null);The diff view controller must be pushed onto a navigation controller's stack before being shown.
Retrieving the file comparison output.
The
PTDiffViewController creates an output file showing the
visual difference between the two documents in a temporary directory and
returns an
NSURL
with the file's location via a delegate method.
To save and display the file, you must conform to the
PTDiffViewControllerDelegate protocol.
File comparison sample code
The following sample code demonstrates how to use PDFNet to generate a document
displaying the visual difference between two PDF pages:
// Xamarin sample code coming soonGet the answers you need: Chat with us