How to: Load a PDF Document from a Stream

• Jun 20, 2018

This example shows how to load a document from the Stream using the DocumentViewerControl.DocumentSource property. The stream is obtained from the assembly resources:

C#

Assembly.GetExecutingAssembly().GetManifestResourceStream(resourceName);

VB.NET

System.Reflection.Assembly.GetExecutingAssembly().GetManifestResourceStream(resourceName)

Note that when you load a document, the input stream will not be closed before the control finishes using a document (PdfViewerControl.DetachStreamOnLoadComplete is set to false by default). This allows the PDF Viewer to render a large PDF quickly.

Note

A complete sample project is available at https://github.com/DevExpress-Examples/how-to-load-a-pdf-document-from-a-stream-t263193.

MainWindow.xaml.cs

using System.IO;
using System.Reflection;
using System.Windows;

namespace LoadPDFDocument {

    public partial class MainWindow : Window {

        public MainWindow() {
            InitializeComponent();
            Stream stream = GetResourceStream("LoadPDFDocument.Demo.pdf");           
            Viewer.DocumentSource = stream;
        }
        static Stream GetResourceStream(string resourceName) {
            return Assembly.GetExecutingAssembly().GetManifestResourceStream(resourceName);
        }
    }
}

MainWindow.xaml

<Window
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:dxpdf="http://schemas.devexpress.com/winfx/2008/xaml/pdf" 
        x:Class="LoadPDFDocument.MainWindow"
        Title="MainWindow" Height="350" Width="525">

    <Grid>
        <dxpdf:PdfViewerControl x:Name="Viewer" />
    </Grid>
</Window>

MainWindow.xaml.vb

Imports System.IO
Imports System.Reflection
Imports System.Windows

Namespace LoadPDFDocument

    Partial Public Class MainWindow
        Inherits Window

        Public Sub New()
            InitializeComponent()
            Dim stream As Stream = GetResourceStream("LoadPDFDocument.Demo.pdf")
            Viewer.DocumentSource = stream
        End Sub
        Private Shared Function GetResourceStream(ByVal resourceName As String) As Stream
            Return System.Reflection.Assembly.GetExecutingAssembly().GetManifestResourceStream(resourceName)
        End Function
    End Class
End Namespace