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  }}