C#_使用PdfSharp來實踐Pdf產生與寫入寫出

 
提到C#中要處理pdf相關的資料
多半會想到iTextSharp這套Library



不過由於iTextSharp採用的是AGPL授權
使用了也有義務要開放原始碼,否則要付費使用。
因此在執行處理到一定量會開始跑出警告



這邊覺得pdf處理第三方Library若不想付費但又要商用
可以改採用PdfSharp
本身採用的是MIT License

至Nuget下載PdfSharp



sourceforge官網釋出的範例與套件包


使用範例

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using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using PdfSharp;//PageSize
using PdfSharp.Drawing;//XGraphics,XFont需要引入的
using PdfSharp.Pdf;//PdfDocument , PdfPage需要引入的

namespace PdfSharpApp
{
    class Program
    {        
        //http://www.pdfsharp.net/wiki/HelloWorld-sample.ashx
        static void Main(string[] args)
        {
            PdfDocument document = new PdfDocument();
            Console.WriteLine("Start create pdf file");            
            document.Info.Title = "pdf title";
            document.Info.Subject = "pdf Subject";

            //增加新的一頁
            PdfPage page = document.AddPage();
            page.Orientation = PageOrientation.Portrait;
            page.Size = PageSize.A4;

            //以此頁進行畫布初始配置
            XGraphics gfx = XGraphics.FromPdfPage(page);
            //字體與大小指定
            XFont font = new XFont("Arial", 20, XFontStyle.Bold);            
            gfx.DrawString("Hello, World!", 
                            font, XBrushes.Black,new XRect(0, 0, page.Width, page.Height),
                            XStringFormats.Center);
            // Create the root bookmark. You can set the style and the color.
            PdfOutline outline = document.Outlines.Add("Root", page, true, PdfOutlineStyle.Bold, XColors.Red);

            outline.Outlines.Add("Page 1", page, true);

            page = document.AddPage();
            page.Orientation = PageOrientation.Portrait;
            page.Size = PageSize.A0;
            page.Orientation = PageOrientation.Landscape;
            outline.Outlines.Add("Page 2", page, true);
            gfx = XGraphics.FromPdfPage(page);

            XRect rect;
            XPen pen;
            double x = 50, y = 100;
            XFont fontH1 = new XFont("Times", 18, XFontStyle.Bold);
            XFont font2 = new XFont("Times", 12);
            XFont fontItalic = new XFont("Times", 12, XFontStyle.BoldItalic);
            double ls = font2.GetHeight();

            // Draw some text
            gfx.DrawString("Create PDF on the fly with PDFsharp",
                fontH1, XBrushes.Black, x, x);
            gfx.DrawString("With PDFsharp you can use the same code to draw graphic, " +
                "text and images on different targets.", font, XBrushes.Black, x, y);
            y += ls;
            gfx.DrawString("The object used for drawing is the XGraphics object.",
                font, XBrushes.Black, x, y);
            y += 2 * ls;

            // Draw an arc
            pen = new XPen(XColors.Red, 4);
            pen.DashStyle = XDashStyle.Dash;
            gfx.DrawArc(pen, x + 20, y, 100, 60, 150, 120);

            // Draw a star
            XGraphicsState gs = gfx.Save();
            gfx.TranslateTransform(x + 140, y + 30);
            for (int idx = 0; idx < 360; idx += 10)
            {
                gfx.RotateTransform(10);
                gfx.DrawLine(XPens.DarkGreen, 0, 0, 30, 0);
            }
            gfx.Restore(gs);

            // Draw a rounded rectangle
            rect = new XRect(x + 230, y, 100, 60);
            pen = new XPen(XColors.DarkBlue, 2.5);
            XColor color1 = XColor.FromKnownColor((XKnownColor)KnownColor.DarkBlue);
            XColor color2 = XColors.Red;
            XLinearGradientBrush lbrush = new XLinearGradientBrush(rect, color1, color2,
              XLinearGradientMode.Vertical);
            gfx.DrawRoundedRectangle(pen, lbrush, rect, new XSize(10, 10));

            // Draw a pie
            pen = new XPen(XColors.DarkOrange, 1.5);
            pen.DashStyle = XDashStyle.Dot;
            gfx.DrawPie(pen, XBrushes.Blue, x + 360, y, 100, 60, -130, 135);


            // Draw some more text
            y += 60 + 2 * ls;
            gfx.DrawString("With XGraphics you can draw on a PDF page as well as " +
                "on any System.Drawing.Graphics object.", font, XBrushes.Black, x, y);
            y += ls * 1.1;
            gfx.DrawString("Use the same code to", font, XBrushes.Black, x, y);
            x += 10;
            y += ls * 1.1;
            gfx.DrawString("• draw on a newly created PDF page", font, XBrushes.Black, x, y);
            y += ls;
            gfx.DrawString("• draw above or beneath of the content of an existing PDF page",
                font, XBrushes.Black, x, y);
            y += ls;
            gfx.DrawString("• draw in a window", font, XBrushes.Black, x, y);
            y += ls;
            gfx.DrawString("• draw on a printer", font, XBrushes.Black, x, y);
            y += ls;
            gfx.DrawString("• draw in a bitmap image", font, XBrushes.Black, x, y);
            x -= 10;
            y += ls * 1.1;
            gfx.DrawString("You can also import an existing PDF page and use it like " +
                "an image, e.g. draw it on another PDF page.", font, XBrushes.Black, x, y);
            y += ls * 1.1 * 2;
            gfx.DrawString("Imported PDF pages are neither drawn nor printed; create a " +
                "PDF file to see or print them!", fontItalic, XBrushes.Firebrick, x, y);
            y += ls * 1.1;
            gfx.DrawString("Below this text is a PDF form that will be visible when " +
                "viewed or printed with a PDF viewer.", fontItalic, XBrushes.Firebrick, x, y);
            y += ls * 1.1;

            PageSize[] pageSizes = (PageSize[])Enum.GetValues(typeof(PageSize));
            // Create some more pages
            for (int idx = 3; idx <= 6; idx++)
            {
                page = document.AddPage();
                page.Size = pageSizes[idx-1];
                page.Orientation = PageOrientation.Landscape;

                gfx = XGraphics.FromPdfPage(page);

                string text = "Page " + idx;
                gfx.DrawString(text, font, XBrushes.Black, 20, 50, XStringFormats.Default);                

                // Create a sub bookmark
                outline.Outlines.Add(text, page, true);
            }



            //存檔
            string fileName = "Test.pdf";
            document.Save(fileName);

            Console.WriteLine("Finish create pdf file");
            Console.ReadKey();
        }



    }
}




比較常用到的還有浮水印

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using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using PdfSharp;//PageSize
using PdfSharp.Drawing;//XGraphics,XFont需要引入的
using PdfSharp.Pdf;//PdfDocument , PdfPage需要引入的

namespace PdfSharpApp
{
    class Program
    {        
        //http://www.pdfsharp.net/wiki/HelloWorld-sample.ashx
        static void Main(string[] args)
        {
            PdfDocument document = new PdfDocument();
            Console.WriteLine("Start create pdf file");            
            document.Info.Title = "pdf title";
            document.Info.Subject = "pdf Subject";

            //增加新的一頁
            PdfPage page = document.AddPage();
            page.Orientation = PageOrientation.Portrait;
            page.Size = PageSize.A4;

            //以此頁進行畫布初始配置
            XGraphics gfx = XGraphics.FromPdfPage(page);           

            XRect rect;
            XPen pen;
            double x = 50, y = 100;
            XFont fontH1 = new XFont("Times", 18, XFontStyle.Bold);
            XFont font = new XFont("Times", 12);
            XFont fontItalic = new XFont("Times", 12, XFontStyle.BoldItalic);
            double ls = font.GetHeight();

            // Draw some text
            gfx.DrawString("Create PDF on the fly with PDFsharp",
                fontH1, XBrushes.Black, x, x);
            gfx.DrawString("With PDFsharp you can use the same code to draw graphic, " +
                "text and images on different targets.", font, XBrushes.Black, x, y);
            y += ls;
            gfx.DrawString("The object used for drawing is the XGraphics object.",
                font, XBrushes.Black, x, y);
            y += 2 * ls;

            // Draw an arc
            pen = new XPen(XColors.Red, 4);
            pen.DashStyle = XDashStyle.Dash;
            gfx.DrawArc(pen, x + 20, y, 100, 60, 150, 120);

            // Draw a star
            XGraphicsState gs = gfx.Save();
            gfx.TranslateTransform(x + 140, y + 30);
            for (int idx = 0; idx < 360; idx += 10)
            {
                gfx.RotateTransform(10);
                gfx.DrawLine(XPens.DarkGreen, 0, 0, 30, 0);
            }
            gfx.Restore(gs);

            // Draw a rounded rectangle
            rect = new XRect(x + 230, y, 100, 60);
            pen = new XPen(XColors.DarkBlue, 2.5);
            XColor color1 = XColor.FromKnownColor((XKnownColor)KnownColor.DarkBlue);
            XColor color2 = XColors.Red;
            XLinearGradientBrush lbrush = new XLinearGradientBrush(rect, color1, color2,
              XLinearGradientMode.Vertical);
            gfx.DrawRoundedRectangle(pen, lbrush, rect, new XSize(10, 10));

            // Draw a pie
            pen = new XPen(XColors.DarkOrange, 1.5);
            pen.DashStyle = XDashStyle.Dot;
            gfx.DrawPie(pen, XBrushes.Blue, x + 360, y, 100, 60, -130, 135);


            // Draw some more text
            y += 60 + 2 * ls;
            gfx.DrawString("With XGraphics you can draw on a PDF page as well as " +
                "on any System.Drawing.Graphics object.", font, XBrushes.Black, x, y);
            y += ls * 1.1;
            gfx.DrawString("Use the same code to", font, XBrushes.Black, x, y);
            x += 10;
            y += ls * 1.1;
            gfx.DrawString("• draw on a newly created PDF page", font, XBrushes.Black, x, y);
            y += ls;
            gfx.DrawString("• draw above or beneath of the content of an existing PDF page",
                font, XBrushes.Black, x, y);
            y += ls;
            gfx.DrawString("• draw in a window", font, XBrushes.Black, x, y);
            y += ls;
            gfx.DrawString("• draw on a printer", font, XBrushes.Black, x, y);
            y += ls;
            gfx.DrawString("• draw in a bitmap image", font, XBrushes.Black, x, y);
            x -= 10;
            y += ls * 1.1;
            gfx.DrawString("You can also import an existing PDF page and use it like " +
                "an image, e.g. draw it on another PDF page.", font, XBrushes.Black, x, y);
            y += ls * 1.1 * 2;
            gfx.DrawString("Imported PDF pages are neither drawn nor printed; create a " +
                "PDF file to see or print them!", fontItalic, XBrushes.Firebrick, x, y);
            y += ls * 1.1;
            gfx.DrawString("Below this text is a PDF form that will be visible when " +
                "viewed or printed with a PDF viewer.", fontItalic, XBrushes.Firebrick, x, y);

            // Variation 1: Draw a watermark as a text string.
            XFont font2 = new XFont("Times", 80);
            string watermark = "WaterMark Test";
            // Get an XGraphics object for drawing beneath the existing content.
            //gfx = XGraphics.FromPdfPage(page, XGraphicsPdfPageOptions.Prepend);

            // Get the size (in points) of the text.
            var size = gfx.MeasureString(watermark, font2);

            // Define a rotation transformation at the center of the page.
            gfx.TranslateTransform(page.Width / 2, page.Height / 2);
            gfx.RotateTransform(-Math.Atan(page.Height / page.Width) * 180 / Math.PI);
            gfx.TranslateTransform(-page.Width / 2, -page.Height / 2);

            // Create a string format.
            var format = new XStringFormat();
            format.Alignment = XStringAlignment.Near;
            format.LineAlignment = XLineAlignment.Near;

            // Create a dimmed red brush.
            XBrush brush = new XSolidBrush(XColor.FromArgb(128, 255, 0, 0));

            // Draw the string.
            gfx.DrawString(watermark, font2, brush,
                new XPoint((page.Width - size.Width) / 2, (page.Height - size.Height) / 2),
                format);


            //存檔
            string fileName = "Test.pdf";
            document.Save(fileName);

            Console.WriteLine("Finish create pdf file");
            Console.ReadKey();
        }



    }
}






還有多頁pdf的merge

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//Combine Documents
//http://pdfsharp.com/PDFsharp/index.php?option=com_content&task=view&id=34&Itemid=45
//Concatenate Documents
//http://pdfsharp.com/PDFsharp/index.php%3Foption%3Dcom_content%26task%3Dview%26id%3D52%26Itemid%3D60
/// <summary>
/// 合併多個pdf檔案
/// </summary>
/// <param name="lsPdfFile"></param>
/// <param name="mergedFile"></param>
public static void MergePdfFiles_PdfSharp(List<byte[]> lsPdfFile, string mergedFile)
{
    try
    {
        PdfSharp.Pdf.PdfDocument pdfMergedDocument = new PdfSharp.Pdf.PdfDocument();

        for (int i = 0; i < lsPdfFile.Count; i++)
        {
            Stream stream = new MemoryStream(lsPdfFile[i]);
            PdfSharp.Pdf.PdfDocument inputDocument = PdfSharp.Pdf.IO.PdfReader.Open(stream,PdfSharp.Pdf.IO.PdfDocumentOpenMode.Import);
            pdfMergedDocument.Version = inputDocument.Version;
            foreach (PdfSharp.Pdf.PdfPage page in inputDocument.Pages)
            {
                pdfMergedDocument.AddPage(page);
            }
        }
        pdfMergedDocument.Save(mergedFile);
    }
    catch (Exception ex)
    {
        throw;
    }
}










Ref:



Home of PDFsharp and MigraDoc Foundation

PDFsharp and MigraDoc Wiki

使用PDFsharp產生PDF檔案

C# 利用PdfSharp生成Pdf檔案

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