C# PdfDocument.LoadFromFile方法代码示例

        private void button1_Click(object sender, EventArgs e)
        {
            //load two document
            PdfDocument doc1 = new PdfDocument();
            doc1.LoadFromFile(@"..\..\..\..\..\..\Data\Sample1.pdf");

            PdfDocument doc2 = new PdfDocument();
            doc2.LoadFromFile(@"..\..\..\..\..\..\Data\Sample3.pdf");

            //Create page template
            PdfTemplate template = doc1.Pages[0].CreateTemplate();

            foreach (PdfPageBase page in doc2.Pages)
            {
                page.Canvas.SetTransparency(0.25f, 0.25f, PdfBlendMode.Overlay);
                page.Canvas.DrawTemplate(template, PointF.Empty);
            }

            //Save pdf file.
            doc2.SaveToFile("Overlay.pdf");
            doc1.Close();
            doc2.Close();

            //Launching the Pdf file.
            PDFDocumentViewer("Overlay.pdf");
        }

        static void Main(string[] args)
        {
            PdfDocument doc = new PdfDocument();
            doc.LoadFromFile("sample.pdf");

            //Use the default printer to print all the pages
            //doc.PrintDocument.Print();

            //Set the printer and select the pages you want to print

            PrintDialog dialogPrint = new PrintDialog();
            dialogPrint.AllowPrintToFile = true;
            dialogPrint.AllowSomePages = true;
            dialogPrint.PrinterSettings.MinimumPage = 1;
            dialogPrint.PrinterSettings.MaximumPage = doc.Pages.Count;
            dialogPrint.PrinterSettings.FromPage = 1;
            dialogPrint.PrinterSettings.ToPage = doc.Pages.Count;

            if (dialogPrint.ShowDialog() == DialogResult.OK)
            {
                //Set the pagenumber which you choose as the start page to print
                doc.PrintFromPage = dialogPrint.PrinterSettings.FromPage;
                //Set the pagenumber which you choose as the final page to print
                doc.PrintToPage = dialogPrint.PrinterSettings.ToPage;
                //Set the name of the printer which is to print the PDF
                doc.PrinterName = dialogPrint.PrinterSettings.PrinterName;

                PrintDocument printDoc = doc.PrintDocument;
                dialogPrint.Document = printDoc;
                printDoc.Print();
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            //Create a pdf document.
            PdfDocument doc = new PdfDocument();
            doc.LoadFromFile(@"..\..\..\..\..\..\Data\Sample2.pdf");

            StringBuilder buffer = new StringBuilder();
            IList<Image> images = new List<Image>();

            foreach (PdfPageBase page in doc.Pages)
            {
                buffer.Append(page.ExtractText());
                foreach (Image image in page.ExtractImages())
                {
                    images.Add(image);
                }
            }

            doc.Close();

            //save text
            String fileName = "TextInPdf.txt";
            File.WriteAllText(fileName, buffer.ToString());

            //save image
            int index = 0;
            foreach (Image image in images)
            {
                String imageFileName
                    = String.Format("Image-{0}.png", index++);
                image.Save(imageFileName, ImageFormat.Png);
            }

            //Launching the Pdf file.
            PDFDocumentViewer(fileName);
        }

        private void dicret_download_Click(object sender, EventArgs e)
        {
            try
            {
                //MessageBox.Show("打印出错");
                string current_id = mydata.Rows[mydata.CurrentRow.Index].Cells["id"].Value.ToString();
                foreach (var item in jsonlist)
                {
                    if (current_id == item.id)
                    {
                        string filename = "";
                        filename = path + "\\" + item.id + "_" + item.copies + "_" + item.double_side + "_" + item.student_number + "_" + item.name;
                        if (File.Exists(@filename))
                        {
                            filename = item.id + "_" + item.copies + "_" + item.double_side + "_" + item.student_number + "_" + item.name;
                            PdfDocument doc = new PdfDocument();
                            doc.LoadFromFile(path + "/" + filename);
                            PrintDialog dialogprint = new PrintDialog();

                            List<string> printerlist = new List<string>();
                            List<string> printers_only_canduplex = new List<string>();
                            List<string> printers_only_supportcolor = new List<string>();
                            List<string> printers_canduplex_supportcolor = new List<string>();
                            List<string> printers_no_cando = new List<string>();
                            string defaultprinter = dialogprint.PrinterSettings.PrinterName;

                            foreach (string printname in PrinterSettings.InstalledPrinters)
                            {
                                if (!printerlist.Contains(printname))
                                {
                                    printerlist.Add(printname);
                                }
                            }

                            printerlist.Remove("Microsoft XPS Document Writer");
                            printerlist.Remove("Fax");

                            foreach (string printername in printerlist)
                            {
                                if (!printers_only_canduplex.Contains(printername))
                                {
                                    dialogprint.PrinterSettings.PrinterName = printername;
                                    if ((dialogprint.PrinterSettings.CanDuplex) && (!dialogprint.PrinterSettings.SupportsColor))
                                    {
                                        printers_only_canduplex.Add(printername);
                                    }
                                }
                            }

                            foreach (string printername in printerlist)
                            {
                                if (!printers_only_supportcolor.Contains(printername))
                                {
                                    dialogprint.PrinterSettings.PrinterName = printername;
                                    if ((dialogprint.PrinterSettings.SupportsColor) && (!dialogprint.PrinterSettings.CanDuplex))
                                    {
                                        printers_only_supportcolor.Add(printername);
                                    }
                                }
                            }

                            foreach (string printername in printerlist)
                            {
                                if (!printers_canduplex_supportcolor.Contains(printername))
                                {
                                    dialogprint.PrinterSettings.PrinterName = printername;
                                    if ((dialogprint.PrinterSettings.SupportsColor) && (dialogprint.PrinterSettings.CanDuplex))
                                    {
                                        printers_canduplex_supportcolor.Add(printername);
                                    }
                                }
                            }
                            foreach (string printername in printerlist)
                            {
                                if (!printers_no_cando.Contains(printername))
                                {
                                    dialogprint.PrinterSettings.PrinterName = printername;
                                    if ((!dialogprint.PrinterSettings.CanDuplex) && (!dialogprint.PrinterSettings.SupportsColor))
                                    {
                                        printers_no_cando.Add(printername);
                                    }
                                }
                            }
                            if (printerlist.Count == 0)
                            {
                                throw new Exception("该电脑并未安装打印机");
                            }
                            dialogprint.PrinterSettings.PrinterName = defaultprinter;
                            if ((item.color == "0") && (item.double_side == "单面"))
                            {
                                if (dialogprint.PrinterSettings.SupportsColor)
                                {
                                    if (printers_no_cando.Count == 0)
                                    {
                                        if (printers_only_canduplex.Count == 0)
                                        {
                                            if (printers_only_supportcolor.Count == 0)
                                            {
                                                dialogprint.PrinterSettings.PrinterName = printers_canduplex_supportcolor[0];
                                            }
//.........这里部分代码省略.........

 public List<Image> GetImages(string filePath)
 {
     PdfDocument doc = new PdfDocument();
     doc.LoadFromFile(filePath);
     return GetImages(doc);
 }

        private void set_before_print_Click(object sender, EventArgs e)
        {
            try
            {
                //MessageBox.Show("打印出错");
                string current_id = mydata.Rows[mydata.CurrentRow.Index].Cells["id"].Value.ToString();
                foreach (var item in jsonlist)
                {
                    if (current_id == item.id)
                    {
                        string filename = "";
                        filename = path + "\\" + item.id + "_" + item.copies + "_" + item.double_side + "_" + item.student_number + "_" + item.name;
                        if (File.Exists(@filename))
                        {
                            filename = item.id + "_" + item.copies + "_" + item.double_side + "_" + item.student_number + "_" + item.name;
                            PdfDocument doc = new PdfDocument();
                            doc.LoadFromFile(path + "/" + filename);
                            PrintDialog dialogprint = new PrintDialog();

                            dialogprint.UseEXDialog = true;
                            dialogprint.AllowPrintToFile = true;
                            dialogprint.AllowSomePages = true;
                            dialogprint.PrinterSettings.MinimumPage = 1;
                            dialogprint.PrinterSettings.MaximumPage = doc.Pages.Count;
                            dialogprint.PrinterSettings.FromPage = 1;
                            dialogprint.PrinterSettings.Collate = true;
                            //dialogprint.PrinterSettings.CanDuplex = true;
                            //dialogprint.PrinterSettings.
                            dialogprint.PrinterSettings.ToPage = doc.Pages.Count;

                            string copy = item.copies.Substring(0, 1);
                            dialogprint.PrinterSettings.Copies = (short)Int32.Parse(copy);

                            //dialogprint.ShowDialog();
                            if (dialogprint.ShowDialog() == DialogResult.OK)
                            {
                            doc.PrintFromPage = dialogprint.PrinterSettings.FromPage;
                            doc.PrintToPage = dialogprint.PrinterSettings.ToPage;
                            doc.PrintDocument.PrinterSettings = dialogprint.PrinterSettings;
                            PrintDocument printdoc = doc.PrintDocument;

                            dialogprint.Document = printdoc;
                            printdoc.Print();
                            }
                            break;

                        }
                        else
                        {
                            filename = item.id + "_" + item.copies + "_" + item.double_side + "_" + item.student_number + "_" + item.name;
                            //get 文件详细信息 URI操作示意: GET /File/1234
                            string jsonUrl = API.GetMethod("/File/" + item.id);
                            JObject jo = JObject.Parse(jsonUrl);
                            ToJsonMy thisOne = new ToJsonMy();
                            thisOne.url = (jo)["url"].ToString();
                            if (!Directory.Exists(path))
                            {
                                Directory.CreateDirectory(path);
                            }
                            WebClient webClient = new WebClient();
                            String pathDoc = path + "/" + filename;
                            webClient.DownloadFileCompleted += new AsyncCompletedEventHandler(OnDownloadFileCompleted);
                            webClient.DownloadFileAsync(new Uri(thisOne.url), pathDoc, id);

                            //fileDownload(thisOne.url, filename, item.id);
                            MessageBox.Show("正在下载该文件！\n请等待，稍后请再次点击打印按钮");
                        }
                        break;
                    }
                }
            }
            catch (Exception excep)
            {
                MessageBox.Show(excep.Message, "无法打印");
            }
        }

        static void Main(string[] args)
        {
            // Check if path was provided
            if (args.Length == 0)
            {
                Console.WriteLine("Please enter a path to read for image/PDF files! Exiting..");

                return;
            }

            var path = args[0];
            if (!System.IO.Directory.Exists(path))
            {
                Console.WriteLine("Invalid path, does not exist! Exiting..");

                return;
            }

            var outputPath = Path.Combine(path, "output");
            if (!System.IO.Directory.Exists(outputPath))
                System.IO.Directory.CreateDirectory(outputPath);

            var files = System.IO.Directory.EnumerateFiles(path, "*.*", SearchOption.TopDirectoryOnly)
                .Where(
                    f => f.ToLower().EndsWith(".jpg") ||
                    f.ToLower().EndsWith(".jpeg") ||
                    f.ToLower().EndsWith(".png") ||
                    f.ToLower().EndsWith(".pdf"));

            foreach (var file in files)
            {
                var lowerFile = file.ToLower();

                if (lowerFile.EndsWith(".pdf"))
                {
                    Console.WriteLine($"Current file: {file}");
                    var pdf = new PdfDocument();
                    pdf.LoadFromFile(file);

                    // Save first page of PDF
                    using (var bmp = pdf.SaveAsImage(0))
                    {
                        var outputFilename = Path.Combine(outputPath, $"{Path.GetFileNameWithoutExtension(file)}.jpg");
                        Console.WriteLine($"Saving jpg to {outputFilename}");
                        bmp.Save(outputFilename, ImageFormat.Jpeg);
                    }
                }
                else if (lowerFile.EndsWith(".png"))
                {
                    Console.WriteLine($"Current file: {file}");
                    RotateImageIfNeeded(file, outputPath);
                }
                else if (lowerFile.EndsWith(".jpg") || lowerFile.EndsWith(".jpeg"))
                {
                    Console.WriteLine($"Current file: {file}");
                    try
                    {
                        var dirs = ImageMetadataReader.ReadMetadata(file);
                        if (dirs.Any())
                        {
                            Console.WriteLine("meta data to read");
                        }
                        var dir = dirs.Where(d => d.Name.Equals("Exif IFD0")).SingleOrDefault();
                        if (dir != null)
                        {
                            var orientation = dir.Tags.Where(t => t.TagName.Equals("Orientation")).SingleOrDefault();
                            if (orientation != null)
                            {
                                Console.WriteLine($"-- orientation = {orientation.Description}, dir name = {dir.Name}");
                                ExifRotateImageIfNeeded(file, outputPath);
                            }
                            else
                            {
                                Console.WriteLine("-- orientation not found!");
                                RotateImageIfNeeded(file, outputPath);
                            }
                        }
                        else
                        {
                            Console.WriteLine("-- orientation not found!");
                            RotateImageIfNeeded(file, outputPath);
                        }


                        //foreach (var dir in dirs)
                        //{

                        //    {

                        //    }
                        //}

                        //foreach (var tag in dir.Tags)

                        //    Console.WriteLine($"{dir.Name} - {tag.TagName} = {tag.Description}");
                        
                    }
                    catch (Exception ex)
                    {
                        Console.WriteLine("UNABLE TO READ");
//.........这里部分代码省略.........

        /// <summary>
        /// Gets this weeks menu from admin.ordbogen.com
        /// </summary>
        public void GetMenu()
        {
            DateTimeFormatInfo dfi = DateTimeFormatInfo.CurrentInfo;
            Calendar cal = dfi.Calendar;
            int weekNo = cal.GetWeekOfYear(DateTime.Now, CalendarWeekRule.FirstFourDayWeek, DayOfWeek.Monday);

            string path = "https://admin.ordbogen.com";
            string pathMenu = "https://admin.ordbogen.com";
            string localPdfFile = Controller.dir + "menu.pdf";
            string thisWeeksMenu = Controller.dir + "menu " + weekNo + ".png";
            string LastWeekMenu = Controller.dir + "menu " + (weekNo - 1) + ".png";

            if (File.Exists(LastWeekMenu) || !File.Exists(thisWeeksMenu))
            {
                try
                {
                    HtmlDocument doc = new HtmlWeb().Load(path, "GET", new System.Net.WebProxy(), new System.Net.NetworkCredential(Authentication.getAuthorization(true), Authentication.getAuthorization(false)));

                    if (doc != null)
                    {
                        var aNodes = doc.DocumentNode.SelectNodes("//a");
                        var element = new HtmlNode(HtmlNodeType.Element, doc, 0);

                        foreach (var item in aNodes)
                        {
                            if (item.InnerText.ToLower().Contains("menu"))
                                if (item.InnerText.Contains(weekNo.ToString()))
                                    element = item;
                        }

                        var attributes = element.Attributes;
                        foreach (var item in attributes)
                        {
                            if (item.Name == "href")
                            {
                                pathMenu += item.Value;
                            }
                        }

                        WebClient wb = new WebClient();
                        wb.Credentials = new NetworkCredential(Authentication.getAuthorization(true), Authentication.getAuthorization(false));
                        wb.DownloadFile(pathMenu, localPdfFile);

                        PdfDocument pdf = new PdfDocument();
                        pdf.LoadFromFile(localPdfFile);
                        Image bmp = pdf.SaveAsImage(0);
                        bmp.Save(thisWeeksMenu, ImageFormat.Png);

                        File.Delete(localPdfFile);
                        if (File.Exists(LastWeekMenu))
                            File.Delete(LastWeekMenu);
                    }
                    else
                    {
                        if (CheckInternetConnection())
                        {
                            System.Windows.MessageBox.Show(@"Der kan være opstået et problem med brugeren til i AdminUsers.txt. Opdater den her: C:\Users\[User]\(SKJULT)AppData\Local\ATIS", "MainStorage Error", System.Windows.MessageBoxButton.OK, System.Windows.MessageBoxImage.Error);
                        }
                    }
                }
                catch (Exception e) { System.Windows.MessageBox.Show(e.Message); }
            }
        }