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 }}