How to extract the selected pages from a PDF document using WPF PDF Viewer?

The WPF PDFViewer allows the user to extract the text from the PDF document using the ExtractText API, but there is no direct API to extract the pages of the PDF document. This can be achieved as a work around by getting the selected pages from the PageSelected Event and then importing the selected pages into a new document.

Steps to Extract the selected pages from a PDF document:

Step-1: Get the selected pages from the page selected event:

• Wire the page selected event in the constructor class of the main window.

C#

//Wire the PageSelected event
pdfViewer.PageSelected += PdfViewer_PageSelected;

• Get the selected page indices from the PageSelectedEventArgs and store it as a integer array.

C#

//Handle the PageSelected Event
private void PdfViewer_PageSelected(object sender, PageSelectedEventArgs e)
{
//Get the selected page indices
selectedPages = e.SelectedPages;
}

Step-2: Import the selected pages from the PDF document:

• Get the instance of the loaded document from the PdfViewerControl.

C#

//Get the instance of the loadedDocument
PdfLoadedDocument loadedDocument = pdfViewer.LoadedDocument;

• Create a new PdfDocument and then import the selected indices from the loaded document to the newly created document.

C#

//Create a new document.
PdfDocument doc = new PdfDocument();
 
for (int i = 0; i < selectedPages.Length; i++)
{
// Importing pages from the source document.
doc.ImportPage(loadedDocument, selectedPages[i]);
}

Step-3: Save and load the created PDF document:

• Save the document that contains the extracted pages and close the instance.

C#

//Save the document
doc.Save("ImportPages.pdf");
//Close the instance
doc.Close(true);

 View Sample in GitHub

See Also:

• Importing pages from an existing document.
• Exporting PDF pages in WPF Pdf Viewer
• How to extract text from the predefined rectangle from a PDF document?