How to: Load a PDF Document from a File

• May 16, 2019

The following code example shows how to load a document from a file.

Important

The PDF Viewer locks a file until it is opened in the PDF Viewer. (PdfViewerControl.DetachStreamOnLoadComplete is set to false by default). This allows the PDF Viewer to render a large PDF quickly but makes it impossible to edit or delete the document until it is opened in the PDF Viewer.

If you want to unlock the file after a document is loaded into the PDF Viewer, set the PdfViewerControl.DetachStreamOnLoadComplete property to true. However, in this case the high rendering performance is not guaranteed.

Use the DocumentViewerControl.DocumentSource to load a document in XAML:

XAML

<!--Load document from a file-->
<dxpdf:PdfViewerControl x:Name="pdfViewer"
                        ShowStartScreen="True"
                        DocumentSource="..\\..\\Demo.pdf"/>

The PdfViewerControl.OpenDocument method allows you to load a document from a file in code:

C#

pdfViewer.OpenDocument("..\\..\\Demo.pdf");

VB.NET

pdfViewer.OpenDocument("..\..\Demo.pdf");