C#代码实现PDF文档操作类

using System.IO;
using iTextSharp.text;
using iTextSharp.text.pdf;
namespace DotNet.Utilities
{
 /// <summary>
 /// PDF文档操作类
 /// </summary>
 //------------------------------------调用--------------------------------------------
 //PDFOperation pdf = new PDFOperation();
 //pdf.Open(new FileStream(path, FileMode.Create));
 //pdf.SetBaseFont(@"C:\Windows\Fonts\SIMHEI.TTF");
 //pdf.AddParagraph("测试文档（生成时间：" + DateTime.Now + "）", 15, 1, 20, 0, 0);
 //pdf.Close();
 //-------------------------------------------------------------------------------------
 public class PDFOperation
 {
  #region 构造函数
  /// <summary>
  /// 构造函数
  /// </summary>
  public PDFOperation()
  {
   rect = PageSize.A4;
   document = new Document(rect);
  }
  /// <summary>
  /// 构造函数
  /// </summary>
  /// <param name="type">页面大小(如"A4")</param>
  public PDFOperation(string type)
  {
   SetPageSize(type);
   document = new Document(rect);
  }
  /// <summary>
  /// 构造函数
  /// </summary>
  /// <param name="type">页面大小(如"A4")</param>
  /// <param name="marginLeft">内容距左边框距离</param>
  /// <param name="marginRight">内容距右边框距离</param>
  /// <param name="marginTop">内容距上边框距离</param>
  /// <param name="marginBottom">内容距下边框距离</param>
  public PDFOperation(string type, float marginLeft, float marginRight, float marginTop, float marginBottom)
  {
   SetPageSize(type);
   document = new Document(rect, marginLeft, marginRight, marginTop, marginBottom);
  }
  #endregion
  #region 私有字段
  private Font font;
  private Rectangle rect; //文档大小
  private Document document;//文档对象
  private BaseFont basefont;//字体
  #endregion
  #region 设置字体
  /// <summary>
  /// 设置字体
  /// </summary>
  public void SetBaseFont(string path)
  {
   basefont = BaseFont.CreateFont(path, BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
  }
  /// <summary>
  /// 设置字体
  /// </summary>
  /// <param name="size">字体大小</param>
  public void SetFont(float size)
  {
   font = new Font(basefont, size);
  }
  #endregion
  #region 设置页面大小
  /// <summary>
  /// 设置页面大小
  /// </summary>
  /// <param name="type">页面大小(如"A4")</param>
  public void SetPageSize(string type)
  {
   switch (type.Trim())
   {
    case "A4":
     rect = PageSize.A4;
     break;
    case "A8":
     rect = PageSize.A8;
     break;
   }
  }
  #endregion
  #region 实例化文档
  /// <summary>
  /// 实例化文档
  /// </summary>
  /// <param name="os">文档相关信息（如路径，打开方式等）</param>
  public void GetInstance(Stream os)
  {
   PdfWriter.GetInstance(document, os);
  }
  #endregion
  #region 打开文档对象
  /// <summary>
  /// 打开文档对象
  /// </summary>
  /// <param name="os">文档相关信息（如路径，打开方式等）</param>
  public void Open(Stream os)
  {
   GetInstance(os);
   document.Open();
  }
  #endregion
  #region 关闭打开的文档
  /// <summary>
  /// 关闭打开的文档
  /// </summary>
  public void Close()
  {
   document.Close();
  }
  #endregion
  #region 添加段落
  /// <summary>
  /// 添加段落
  /// </summary>
  /// <param name="content">内容</param>
  /// <param name="fontsize">字体大小</param>
  public void AddParagraph(string content, float fontsize)
  {
   SetFont(fontsize);
   Paragraph pra = new Paragraph(content, font);
   document.Add(pra);
  }
  /// <summary>
  /// 添加段落
  /// </summary>
  /// <param name="content">内容</param>
  /// <param name="fontsize">字体大小</param>
  /// <param name="Alignment">对齐方式（1为居中，0为居左，2为居右）</param>
  /// <param name="SpacingAfter">段后空行数（0为默认值）</param>
  /// <param name="SpacingBefore">段前空行数（0为默认值）</param>
  /// <param name="MultipliedLeading">行间距（0为默认值）</param>
  public void AddParagraph(string content, float fontsize, int Alignment, float SpacingAfter, float SpacingBefore, float MultipliedLeading)
  {
   SetFont(fontsize);
   Paragraph pra = new Paragraph(content, font);
   pra.Alignment = Alignment;
   if (SpacingAfter != 0)
   {
    pra.SpacingAfter = SpacingAfter;
   }
   if (SpacingBefore != 0)
   {
    pra.SpacingBefore = SpacingBefore;
   }
   if (MultipliedLeading != 0)
   {
    pra.MultipliedLeading = MultipliedLeading;
   }
   document.Add(pra);
  }
  #endregion
  #region 添加图片
  /// <summary>
  /// 添加图片
  /// </summary>
  /// <param name="path">图片路径</param>
  /// <param name="Alignment">对齐方式（1为居中，0为居左，2为居右）</param>
  /// <param name="newWidth">图片宽（0为默认值，如果宽度大于页宽将按比率缩放）</param>
  /// <param name="newHeight">图片高</param>
  public void AddImage(string path, int Alignment, float newWidth, float newHeight)
  {
   Image img = Image.GetInstance(path);
   img.Alignment = Alignment;
   if (newWidth != 0)
   {
    img.ScaleAbsolute(newWidth, newHeight);
   }
   else
   {
    if (img.Width > PageSize.A4.Width)
    {
     img.ScaleAbsolute(rect.Width, img.Width * img.Height / rect.Height);
    }
   }
   document.Add(img);
  }
  #endregion
  #region 添加链接、点
  /// <summary>
  /// 添加链接
  /// </summary>
  /// <param name="Content">链接文字</param>
  /// <param name="FontSize">字体大小</param>
  /// <param name="Reference">链接地址</param>
  public void AddAnchorReference(string Content, float FontSize, string Reference)
  {
   SetFont(FontSize);
   Anchor auc = new Anchor(Content, font);
   auc.Reference = Reference;
   document.Add(auc);
  }
  /// <summary>
  /// 添加链接点
  /// </summary>
  /// <param name="Content">链接文字</param>
  /// <param name="FontSize">字体大小</param>
  /// <param name="Name">链接点名</param>
  public void AddAnchorName(string Content, float FontSize, string Name)
  {
   SetFont(FontSize);
   Anchor auc = new Anchor(Content, font);
   auc.Name = Name;
   document.Add(auc);
  }
  #endregion
 }
}