C#使用iTextSharp封装的PDF文件操作类实例

本文实例讲述了c#使用itextsharp封装的pdf文件操作类。分享给大家供大家参考。具体分析如下：

这个c#代码主要讲itextsharp中用于操作pdf文件的方法进行了再次封装，可以更加方便的访问pdf文档，可以动态生成pdf文件、添加内容、设置段落、设置字体等。

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
  }
}

希望本文所述对大家的c#程序设计有所帮助。