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// Install FreeSpire.PDFViewer as a Cake Addin
#addin nuget:?package=FreeSpire.PDFViewer&version=7.6.0
// Install FreeSpire.PDFViewer as a Cake Tool
#tool nuget:?package=FreeSpire.PDFViewer&version=7.6.0                
                                    Free .NET Library for Viewing and Printing PDF Files
Product Page 丨 Documentation 丨 Examples 丨 Forum 丨 Temporary License 丨 Customized Demo
Free Spire.PDFViewer is a powerful PDF Viewer library for .NET. It allows developers to load PDF document from stream, file and byte array. Free version is limited to 10 pages of PDF when viewing and printing PDF files.
Free Spire.PDFViewer is available on viewing PDF/A-1B, PDF/X1A and enables to open and read encrypted PDF files. This PDF Viewer control supports multiple printing orientation including landscape, portrait and automatic.
Main Features
Load PDF from file, stream and byte array;
Support PDF/A-1B, PDF/X1A;
Enable to open and read encrypted PDF files;
Support multiple printing orientations: landscape, portrait, automatic;
Export PDFs to Image format as .bmp, .png, .jpeg;
Set PDF page (page down/up, zoom in/out, display as fit page).
Locate the root of the bookmarks and switch to target bookmark;
Support Rotation, Page layout setup and Thumbnail control;
Locate the PDF attachments which is marked in PDF, and save them to disk;
Four Viewing Patterns: Self-motion, Single page, Serious and Dynamic. Users can also switch over the four patterns.
Technical Features
Microsoft .NET 2.0, .NET 3.0, .NET 3.5, .NET 4.0 supported;
For Windows Form Only;
ASCIIHex decode, ASCII85 decode, Flate decode, LZW decode, Run Length decode, CCITTFax decode, DCT decode, JPX decode supported;
Developed entirely in C#, being 100% managed code;
Totally independent .NET control library. Does NOT require Adobe Reader or any other 3rd party software/library installed on system.
Export Documents to images
using System;
using System.Drawing;
using System.IO;
using System.Windows.Forms;
using Spire.PdfViewer.Forms;
namespace Spire.PdfView.Demos.Export
    class Program
        private static PdfDocumentViewer viewer = null;
        [STAThread]
        static void Main(string[] args)
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            viewer = new PdfDocumentViewer();
            viewer.LoadFromFile("PDFViewer.pdf");
            //form and child components
            Form mainForm = new Form();
            mainForm.Text = "Spire.PdfView Demo - Export";
            mainForm.Size = new System.Drawing.Size(800, 600);
            mainForm.StartPosition = FormStartPosition.CenterScreen;
            TableLayoutPanel table = new TableLayoutPanel();
            table.ColumnCount = 3;
            table.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, 50));
            table.ColumnStyles.Add(new ColumnStyle(SizeType.Absolute, 20));
            table.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, 50));
            table.RowCount = 2;
            table.RowStyles.Add(new RowStyle(SizeType.Percent, 100));
            table.RowStyles.Add(new RowStyle(SizeType.Absolute, 30));
            table.Controls.Add(viewer, 0, 0);
            table.SetColumnSpan(viewer, 3);
            viewer.Dock = DockStyle.Fill;
            //Export current page to one image
            Button button = new Button();
            button.Text = "Export to one image";
            button.Size = new Size(180, 24);
            button.TextAlign = ContentAlignment.MiddleCenter;
            table.Controls.Add(button, 0, 1);
            button.Dock = DockStyle.Right;
            button.Click += ExportToOneImage;
            //Export current pdf document to multiple images
            button = new Button();
            button.Text = "Export to multiple images";
            button.Size = new Size(180, 24);
            button.TextAlign = ContentAlignment.MiddleCenter;
            table.Controls.Add(button, 2, 1);
            button.Dock = DockStyle.Left;
            button.Click += ExportToMultipleImages;
            mainForm.Controls.Add(table);
            table.Dock = DockStyle.Fill;
            Application.Run(mainForm);
        private static void ExportToOneImage(object sender, EventArgs e)
            if (viewer.PageCount > 0)
                SaveFileDialog dialog = new SaveFileDialog();
                dialog.Filter = "PNG Format(*.png)|*.png";
                if (dialog.ShowDialog() == DialogResult.OK)
                    int currentPage = viewer.CurrentPageNumber;
                    Bitmap image = viewer.SaveAsImage(currentPage - 1);
                    image.Save(dialog.FileName);
        private static void ExportToMultipleImages(object sender, EventArgs e)
            if (viewer.PageCount > 0)
                FolderBrowserDialog dialog = new FolderBrowserDialog();
                if (dialog.ShowDialog() == DialogResult.OK)
                    int currentPage = viewer.CurrentPageNumber;
                    Bitmap[] images = viewer.SaveAsImage(0, currentPage - 1);
                    for (int i = 0; i < images.Length; i++)
                        String fileName = Path.Combine(dialog.SelectedPath, String.Format("PDFViewer-{0}.png", i));
                        images[i].Save(fileName);
Product Page 丨 Documentation 丨 Examples 丨 Forum 丨 Temporary License 丨 Customized Demo