Foxit PDF SDK（Windows版）

namespace pdf2imageCS
{
    class pdf2image
    {
        private const string input_path = "../input_files/";
        private const string output_path = "../output_files/pdf2image/";

        public static void Save2Image(System.Drawing.Bitmap bitmap, int nPageIndex, string sExt)
        {
            string save_name = output_path + string.Format("AboutFoxit_{0}{1}", nPageIndex, sExt);
            // Add the bitmap to image and save the image.
            foxit.common.Image image = new foxit.common.Image();
            image.AddFrame(bitmap);
            image.SaveAs(save_name);

            Console.WriteLine("Save page {0} into a picture of {1} format.", nPageIndex, sExt);
        }

        public static void Save2Image(foxit.common.Image image, string sExt)
        {
            string save_name = output_path + string.Format("AboutFoxit{0}", sExt);
            // Add the bitmap to image and save the image.
            image.SaveAs(save_name);

            Console.WriteLine("Save pdf file into a picture of {0} format.", sExt);
        }

        static void Main(string[] args)
        {
            System.IO.Directory.CreateDirectory(output_path);

            string sn = "";
            string key = "";
            ErrorCode error_code = Library.Initialize(sn, key);
            if (error_code != ErrorCode.e_ErrSuccess)
            {
                Console.WriteLine("Library Initialize Error: {0}\n", error_code);
                return;
            }

            string[] support_image_extends = { ".bmp", ".jpg", ".jpeg", ".png", ".jpx", ".jp2" };
            string[] support_multi_image = { ".tif", ".tiff" };
            try
            {
                string input_file = input_path + "AboutFoxit.pdf";
                using (PDFDoc doc = new PDFDoc(input_file))
                {
                    error_code = doc.Load(null);
                    if (error_code != ErrorCode.e_ErrSuccess)
                    {
                        Console.WriteLine("The PDFDoc [{0}] Error: {1}\n", input_file, error_code);
                        Library.Release();
                        return;
                    }

                    foxit.common.Image image = new foxit.common.Image();
                    // get page count
                    int nPageCount = doc.GetPageCount();
                    for(int i=0;i<nPageCount;i++)
                    {
                        using (PDFPage page = doc.GetPage(i))
                        {
                            // Parse page.
                            page.StartParse((int)foxit.pdf.PDFPage.ParseFlags.e_ParsePageNormal, null, false);

                            int width = (int)(page.GetWidth());
                            int height = (int)(page.GetHeight());
                            Matrix2D matrix = page.GetDisplayMatrix(0, 0, width, height, page.GetRotation());

                            // Prepare a bitmap for rendering.
                            System.Drawing.Bitmap bitmap = new System.Drawing.Bitmap(width, height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
                            Graphics draw = Graphics.FromImage(bitmap);
                            draw.Clear(Color.White);

                            // Render page
                            Renderer render = new Renderer(bitmap, false);
                            render.StartRender(page, matrix, null);
                            image.AddFrame(bitmap);
                            for (int j = 0; j < support_image_extends.Length; j++)
                            {
                                string extend = support_image_extends[j];

                                Save2Image(bitmap, i, extend);
                            }

                            draw.Dispose();
                        }
                    }
                    for (int j = 0; j < support_multi_image.Length; j++)
                    {
                        string extend = support_multi_image[j];

                        Save2Image(image, extend);
                    }
                }
            }
            catch (foxit.PDFException e)
            {
                Console.WriteLine(e.Message);
            }

            Library.Release();
        }
    }
}