C#使用iTextSharp封装的PDF文件操作类实例

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
  }
}