How to: Export a PDF Document to a Bitmap

• Feb 20, 2023
• 2 minutes to read

Important

You need a license for the DevExpress Office File API Subscription or DevExpress Universal Subscription to use these examples in production code.

The following example demonstrates how to export pages to bitmap images.

Note

Set the PdfDocumentProcessor.RenderingEngine property to Skia to enable this method on Azure Web Apps.

Follow the steps below to perform the export:

• Create a PdfDocumentProcessor instance and load the PDF document using the overloaded PdfDocumentProcessor.LoadDocument method.
• Call the PdfDocumentProcessor.CreateBitmap method using the page number and the largestEdgeLength parameter (measured in pixels). This parameter determines the output image’s height for pages in the portrait orientation and width for landscape pages.
• Save the converted bitmap images to a file using the overloaded Bitmap.Save method.

Tip

Pass the PdfPageRenderingParameters instance as the CreateBitmap method parameter to specify a predefined resolution for a PDF page exported to a Bitmap image.

View Example

C#

using DevExpress.Pdf;
using System.Drawing;


int largestEdgeLength = 1000;

// Create a PDF Document Processor.
using (var processor = new PdfDocumentProcessor()) {
    // Load a document.
    processor.LoadDocument("..\\..\\Document.pdf");

    for (int i = 1; i <= processor.Document.Pages.Count; i++) {

        // Export pages to bitmaps.
        Bitmap image = processor.CreateBitmap(i, largestEdgeLength);

        // Save the bitmaps.
        image.Save("..\\..\\MyBitmap" + i + ".bmp");
    }
}

VB.NET

Imports DevExpress.Pdf
Imports System.Drawing

Dim largestEdgeLength As Integer = 1000

Using processor As PdfDocumentProcessor = New PdfDocumentProcessor()
    processor.LoadDocument("..\..\Document.pdf")

    For i As Integer = 1 To processor.Document.Pages.Count
        Dim image As Bitmap = processor.CreateBitmap(i, largestEdgeLength)
        image.Save("..\..\MyBitmap" & i & ".bmp")
    Next
End Using

Warning

The Export to Bitmap feature is unavailable in applications that use the System.Drawing.Common package v7 and higher in non-Windows environments. The API that uses members from the System.Drawing.Common package throws the PlatformNotSupportedException exception.