C#代码实现PDF文档操作类

本文纯干货，贴上pdf文档操作类c#代码，需要添加itextsharp.dll引用才可以正常通过编译。

废话不多说了，直接给大家贴代码了。

代码如下：

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
 }
}

友情提醒需要注意点：需要添加itextsharp.dll引用才可以正常通过编译。