Itextsharp 是一个很强大，开源的，轻量级的 PDF 生成组件，官方网上好像没有相应的API 说明文档，以下是在工作中使用的心得与体会，并附上源码，功能包含了pdf 的创建，table 的创建， 图片的创建以及pdf 文件的读取 。 欢迎转载，转载时，请注明出处。
首先，从Git Itextsharp 官方网站中 ，下载itextsharp.dll 文件，或从VS 的NUGET 管理包中进行添加引用，然后在项目中引用，Demon 中使用的是最新的版本 itextsharp.5.5.13.0 ，或使用该Demon 中的Itextsharp.dll, Git 官网会不定时进行更新，建议使用最新的 Itextsharp.dll 版本。
点击下载 Itextsharp5.5.13.0.dll
Demon 是个wpf 窗体文件，MainWindow.xaml.cs代码如下：
* Copyright: ©2016-2018 dell All Rights Reserved.** Current CLR Version: 4.0.30319.18063** ProjectName: iTextSharp Demon** Assembly：1.0.0.0 ** Author：Will* * Created：2018/7/23 10:04:06* * Description：********************************************************************** Modify By：* * Modify On：* * Modify Description:* ******************************************************************* */ using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Windows; using System.Windows.Controls; using System.Windows.Data; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Imaging; using System.Windows.Navigation; using System.Windows.Shapes; using iTextSharp.text; using iTextSharp.text.pdf; using System.IO;namespace PdfDemo {/// <summary>/// MainWindow.xaml 的交互逻辑/// </summary>public partial class MainWindow : Window{public MainWindow(){InitializeComponent();}/// <summary>/// 我得第一个Pdf程序/// </summary>private void CreatePdf(){Microsoft.Win32.SaveFileDialog dialog = GetDialoag();Nullable<bool> result = dialog.ShowDialog();if (result == true){Document document = new Document();PdfWriter.GetInstance(document, new FileStream(dialog.FileName, FileMode.Create));document.Open();iTextSharp.text.Paragraph paragraph = new iTextSharp.text.Paragraph("Hello World");document.Add(paragraph);document.Close();System.Diagnostics.Process.Start(dialog.FileName);}}/// <summary>/// 设置页面大小、作者、标题等相关信息设置/// </summary>private void CreatePdfSetInfo(){Microsoft.Win32.SaveFileDialog dialog = GetDialoag();Nullable<bool> result = dialog.ShowDialog();if (result == true){//设置纸张大小，自定义大小iTextSharp.text.Rectangle pageSize = new iTextSharp.text.Rectangle(216f, 716f);pageSize.BackgroundColor = new iTextSharp.text.BaseColor(0xFF, 0xFF, 0xDE);//设置边界using (Document document = new Document(pageSize, 36f, 72f, 108f, 180f)){// 也可使用系统定义的纸张大小// Document document = new Document(PageSize.A4, 0, 0, 45, 25);var writer = PdfWriter.GetInstance(document, new FileStream(dialog.FileName, FileMode.Create));document.Open();// 添加文档信息document.AddTitle("PDF Document Create by iTextSharp");document.AddSubject("Welcome to use iTextSharp");document.AddKeywords("PDF,iTextSharp");document.AddCreator("Create by will");document.AddAuthor("Will");// 添加文档内容for (int i = 0; i < 5; i++){document.Add(new iTextSharp.text.Paragraph("Hello World! Successfuly Create PDF document! "));}writer.Flush();document.Close();System.Diagnostics.Process.Start(dialog.FileName);}}}/// <summary>/// 创建多个Pdf新页/// </summary>private void CreateTextPDF(){Microsoft.Win32.SaveFileDialog dialog = GetDialoag();Nullable<bool> result = dialog.ShowDialog();if (result == true){using (Document document = new Document(PageSize.NOTE)){PdfWriter writer = PdfWriter.GetInstance(document, new FileStream(dialog.FileName, FileMode.Create));document.Open();// 新宋体字，后面的1是索引，索引从0开始，索引的可选项： 0， 1 ；不可省略，因宋体字有两种，宋体，新宋string fontFile = @"C:\Windows\Fonts\SIMSUN.TTC,1";// 字体BaseFont bFont = BaseFont.CreateFont(fontFile, BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);iTextSharp.text.Font font = new iTextSharp.text.Font(bFont, 9.0f);for (int k = 1; k < 4; k++){// 添加新页面,第k 页 document.NewPage();// 重新开始页面计数// document.ResetPageCount();for (int i = 1; i < 21; i++){// 使用chuck 可有效的输出文字// 也可使用 document.Add(new iTextSharp.text.Paragraph("Hello World, Hello World, Hello World, Hello World, Hello World"));Chunk chuck = new iTextSharp.text.Chunk("Hello,Hello,Hello,Hello, How are you?");// 文字字体chuck.Font = font;var paragraph = new iTextSharp.text.Paragraph(chuck);// 对齐方式，剧中对齐paragraph.Alignment = Element.ALIGN_CENTER;paragraph.SpacingAfter = 5.0f;document.Add(paragraph);}}writer.Flush();document.Close();System.Diagnostics.Process.Start(dialog.FileName);}}}/// <summary>/// 生成图片pdf页（pdf中插入图片）/// </summary>public void CreatePDFImage(){//临时文件路径string imagePath = AppDomain.CurrentDomain.BaseDirectory + @"Image\1.jpg";Microsoft.Win32.SaveFileDialog dialog = GetDialoag();Nullable<bool> result = dialog.ShowDialog();if (result == true){using (Document document = new Document()){PdfWriter writer = PdfWriter.GetInstance(document, new FileStream(dialog.FileName, FileMode.Create));document.Open();iTextSharp.text.Image img = iTextSharp.text.Image.GetInstance(imagePath);// 图片位置img.SetAbsolutePosition((PageSize.A4.Width - img.ScaledWidth) / 2, (PageSize.A4.Height - img.ScaledHeight) / 2);writer.DirectContent.AddImage(img);iTextSharp.text.Paragraph p = new iTextSharp.text.Paragraph("Hi,I am Wang Wang", new iTextSharp.text.Font(Font.FontFamily.HELVETICA, 22f));p.Alignment = Element.ALIGN_CENTER;document.Add(p);writer.Flush();document.Close();System.Diagnostics.Process.Start(dialog.FileName);}}}/// <summary>/// iTextSharp 读取pdf 文件/// </summary>private void ReadPdf(){try{string fileName = AppDomain.CurrentDomain.BaseDirectory + @"File\ITextSharp Demon.pdf";// 创建一个PdfReader对象PdfReader reader = new PdfReader(fileName);// 获得文档页数int n = reader.NumberOfPages;// 获得第一页的大小iTextSharp.text.Rectangle psize = reader.GetPageSize(1);float width = psize.Width;float height = psize.Height;// 创建一个文档变量Document document = new Document(psize, 50, 50, 50, 50);// 创建该文档PdfWriter writer = PdfWriter.GetInstance(document, new FileStream(@"C:\Read.pdf", FileMode.Create));// 打开文档 document.Open();// 添加内容PdfContentByte cb = writer.DirectContent;int i = 0;int p = 0;Console.WriteLine("一共有 " + n + " 页.");while (i < n){document.NewPage();p++;i++;PdfImportedPage page1 = writer.GetImportedPage(reader, i);cb.AddTemplate(page1, .5f, 0, 0, .5f, 0, height / 2);Console.WriteLine("处理第 " + i + " 页");if (i < n){i++;PdfImportedPage page2 = writer.GetImportedPage(reader, i);cb.AddTemplate(page2, .5f, 0, 0, .5f, width / 2, height / 2);Console.WriteLine("处理第 " + i + " 页");}if (i < n){i++;PdfImportedPage page3 = writer.GetImportedPage(reader, i);cb.AddTemplate(page3, .5f, 0, 0, .5f, 0, 0);Console.WriteLine("处理第 " + i + " 页");}if (i < n){i++;PdfImportedPage page4 = writer.GetImportedPage(reader, i);cb.AddTemplate(page4, .5f, 0, 0, .5f, width / 2, 0);Console.WriteLine("处理第 " + i + " 页");}cb.SetRGBColorStroke(255, 0, 0);cb.MoveTo(0, height / 2);cb.LineTo(width, height / 2);cb.Stroke();cb.MoveTo(width / 2, height);cb.LineTo(width / 2, 0);cb.Stroke();BaseFont bf = BaseFont.CreateFont(BaseFont.HELVETICA, BaseFont.CP1252, BaseFont.NOT_EMBEDDED);cb.BeginText();cb.SetFontAndSize(bf, 14);cb.ShowTextAligned(PdfContentByte.ALIGN_CENTER, "page " + p + " of " + ((n / 4) + (n % 4 > 0 ? 1 : 0)), width / 2, 40, 0);cb.EndText();}// 关闭文档 document.Close();}catch (Exception e){throw e;}}/// <summary>/// pdf 阅读器打开 pdf 文件/// </summary>private void ReadPdfNormal(){try{string fileName = AppDomain.CurrentDomain.BaseDirectory + @"File\ITextSharp Demon.pdf";System.Diagnostics.Process.Start(fileName);}catch (Exception e){throw e;}}/// <summary>/// 创建PDF表格/// </summary>public void CreatePDFTable(){Microsoft.Win32.SaveFileDialog dialog = GetDialoag();Nullable<bool> result = dialog.ShowDialog();if (result != null && result.Equals(true)){using (Document document = new Document()){PdfWriter writer = PdfWriter.GetInstance(document, new FileStream(dialog.FileName, FileMode.Create));document.Open();PdfPTable table = new PdfPTable(5);for (int i = 1; i < 100; i++){PdfPCell cell = new PdfPCell(new Phrase("Cell " + i + "colspan 4 rowspan 1"));// 单元格占的列数，5列cell.Colspan = 4;// 单元格占的行数，3行cell.Rowspan = 1;// 边框cell.BorderWidth = 0.2f;// 边框颜色cell.BorderColor = BaseColor.BLACK;// 水平对齐方式，剧中cell.HorizontalAlignment = Element.ALIGN_CENTER;// 垂直对齐方式： 剧中cell.VerticalAlignment = Element.ALIGN_MIDDLE;// 添加单元格 table.AddCell(cell);PdfPCell cell2 = new PdfPCell(new Phrase("Cell " + i + "colspan 1 rowspan 1"));// 边框cell2.BorderWidth = 0.2f;// 边框颜色cell2.BorderColor = BaseColor.BLACK;// 水平对齐方式，剧中cell2.HorizontalAlignment = Element.ALIGN_CENTER;// 垂直对齐方式： 剧中cell2.VerticalAlignment = Element.ALIGN_MIDDLE;// 添加单元格 table.AddCell(cell2);}document.Add(table);writer.Flush();document.Close();System.Diagnostics.Process.Start(dialog.FileName);}}}/// <summary>/// 保存文件对话框/// </summary>/// <returns></returns>public Microsoft.Win32.SaveFileDialog GetDialoag(){Microsoft.Win32.SaveFileDialog dialog = new Microsoft.Win32.SaveFileDialog();dialog.FileName = "ITextSharp Demon";dialog.DefaultExt = ".pdf";dialog.Filter = "Text documents (.pdf)|*.pdf";return dialog;}// 创建表格private void btnTable_Click(object sender, RoutedEventArgs e){CreateTextPDF();}// 创建文本private void btnText_Click(object sender, RoutedEventArgs e){CreatePDFTable();}// 读取pdf private void btnRead_Click(object sender, RoutedEventArgs e){//ReadPdf(); ReadPdfNormal();}// 创建图片private void btnImage_Click(object sender, RoutedEventArgs e){CreatePDFImage();}} }
MainWindow.xaml 代码如下 ：
<Window x:Class="PdfDemo.MainWindow"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"Title="MainWindow" Height="350" Width="525"><Grid><Button Content="创建文本" Height="23" HorizontalAlignment="Left" Margin="38,268,0,0" Name="button1" VerticalAlignment="Top" Width="75" Click="btnText_Click" /><Button Content="创建表格" Height="23" HorizontalAlignment="Left" Margin="266,0,0,20" Name="button2" VerticalAlignment="Bottom" Width="75" Click="btnTable_Click" /><Button Content="创建图片" Height="23" HorizontalAlignment="Left" Margin="379,268,0,0" Name="button3" VerticalAlignment="Top" Width="75" Click="btnImage_Click" /><Button Content="读取PDF" Height="23" HorizontalAlignment="Left" Margin="151,0,0,20" Name="button4" VerticalAlignment="Bottom" Width="75" Click="btnRead_Click" /><Label Content="Hello,Welcome to use" Height="198" HorizontalAlignment="Center" Margin="23,24,0,0" Name="label1" VerticalAlignment="Top" Width="431" ToolTip="Hello,Welcome to use" FontSize="18" FontWeight="Bold" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" SnapsToDevicePixels="True" /></Grid> </Window>
参考资料：
1. Git Itextsharp 官方网站
2. 其它资料
https://wenku.baidu.com/view/032eb56aaf1ffc4ffe47ac1d.html
https://www.cnblogs.com/loyung/p/6879917.html
https://sourceforge.net/projects/itextsharp/
