C#编程简单实现生成PDF文档的方法示例

本文实例讲述了c#编程简单实现生成pdf文档的方法。分享给大家供大家参考，具体如下：

using system;
using system.io;
using system.text;
using system.collections;
namespace pdfgenerator
{
  public class pdfgenerator
  {
    static float pagewidth = 594.0f;
    static float pagedepth = 828.0f;
    static float pagemargin = 30.0f;
    static float fontsize = 20.0f;
    static float leadsize = 10.0f;
    static streamwriter ppdf = new streamwriter("e:\\mypdf.pdf");
    static memorystream mpdf = new memorystream();
    static void converttobyteandaddtostream(string strmsg)
    {
      byte[] buffer = null;
      buffer = asciiencoding.ascii.getbytes(strmsg);
      mpdf.write(buffer, 0, buffer.length);
      buffer = null;
    }
    static string xrefformatting(long xvalue)
    {
      string strmsg = xvalue.tostring();
      int ilen = strmsg.length;
      if (ilen < 10)
      {
        stringbuilder s = new stringbuilder();
        int i = 10 - ilen;
        s.append('0', i);
        strmsg = s.tostring() + strmsg;
      }
      return strmsg;
    }
    static void main(string[] args)
    {
      arraylist xrefs = new arraylist();
      //byte[] buffer=null;
      float ypos = 0f;
      long streamstart = 0;
      long streamend = 0;
      long streamlen = 0;
      string strpdfmessage = null;
      //pdf文档头信息
      strpdfmessage = "%pdf-1.1\n";
      converttobyteandaddtostream(strpdfmessage);
      xrefs.add(mpdf.length);
      strpdfmessage = "1 0 obj\n";
      converttobyteandaddtostream(strpdfmessage);
      strpdfmessage = "<< /length 2 0 r >>\n";
      converttobyteandaddtostream(strpdfmessage);
      strpdfmessage = "stream\n";
      converttobyteandaddtostream(strpdfmessage);
      ////////pdf文档描述
      streamstart = mpdf.length;
      //字体
      strpdfmessage = "bt\n/f0 " + fontsize + " tf\n";
      converttobyteandaddtostream(strpdfmessage);
      //pdf文档实体高度
      ypos = pagedepth - pagemargin;
      strpdfmessage = pagemargin + " " + ypos + " td\n";
      converttobyteandaddtostream(strpdfmessage);
      strpdfmessage = leadsize + " tl\n";
      converttobyteandaddtostream(strpdfmessage);
      //实体内容
      strpdfmessage = "(http://www.wenhui.org)tj\n";
      converttobyteandaddtostream(strpdfmessage);
      strpdfmessage = "et\n";
      converttobyteandaddtostream(strpdfmessage);
      streamend = mpdf.length;
      streamlen = streamend - streamstart;
      strpdfmessage = "endstream\nendobj\n";
      converttobyteandaddtostream(strpdfmessage);
      //pdf文档的版本信息
      xrefs.add(mpdf.length);
      strpdfmessage = "2 0 obj\n" + streamlen + "\nendobj\n";
      converttobyteandaddtostream(strpdfmessage);
      xrefs.add(mpdf.length);
      strpdfmessage = "3 0 obj\n<</type/page/parent 4 0 r/contents 1 0 r>>\nendobj\n";
      converttobyteandaddtostream(strpdfmessage);
      xrefs.add(mpdf.length);
      strpdfmessage = "4 0 obj\n<</type /pages /count 1\n";
      converttobyteandaddtostream(strpdfmessage);
      strpdfmessage = "/kids[\n3 0 r\n]\n";
      converttobyteandaddtostream(strpdfmessage);
      strpdfmessage = "/resources<</procset[/pdf/text]/font<</f0 5 0 r>> >>\n";
      converttobyteandaddtostream(strpdfmessage);
      strpdfmessage = "/mediabox [ 0 0 " + pagewidth + " " + pagedepth + " ]\n>>\nendobj\n";
      converttobyteandaddtostream(strpdfmessage);
      xrefs.add(mpdf.length);
      strpdfmessage = "5 0 obj\n<</type/font/subtype/type1/basefont/courier/encoding/winansiencoding>>\nendobj\n";
      converttobyteandaddtostream(strpdfmessage);
      xrefs.add(mpdf.length);
      strpdfmessage = "6 0 obj\n<</type/catalog/pages 4 0 r>>\nendobj\n";
      converttobyteandaddtostream(strpdfmessage);
      streamstart = mpdf.length;
      strpdfmessage = "xref\n0 7\n0000000000 65535 f \n";
      for (int i = 0; i < xrefs.count; i++)
      {
        strpdfmessage += xrefformatting((long)xrefs[i]) + " 00000 n \n";
      }
      converttobyteandaddtostream(strpdfmessage);
      strpdfmessage = "trailer\n<<\n/size " + (xrefs.count + 1) + "\n/root 6 0 r\n>>\n";
      converttobyteandaddtostream(strpdfmessage);
      strpdfmessage = "startxref\n" + streamstart + "\n%%eof\n";
      converttobyteandaddtostream(strpdfmessage);
      mpdf.writeto(ppdf.basestream);
      mpdf.close();
      ppdf.close();
    }
  }
}

更多关于c#相关内容感兴趣的读者可查看本站专题：《c#文件操作常用技巧汇总》、《c#遍历算法与技巧总结》、《c#程序设计之线程使用技巧总结》、《c#常见控件用法教程》、《winform控件用法总结》、《c#数据结构与算法教程》及《c#面向对象程序设计入门教程》

希望本文所述对大家c#程序设计有所帮助。