将图片读入到dom中，并将其存为xml文件

1、需要命名空间
using system.text;
using system.io;
using system.xml;
2、文件夹中存在001.jpg图片
3、生成一个docsave.xml文件

/******************
try
   {
    xmldocument myxmldoc = new xmldocument();
    myxmldoc.loadxml("<picture><name>picture</name></picture>");

    xmlelement elem = myxmldoc.createelement("image");

    / 打开图片文件，利用该图片构造一个文件流
    filestream fs = new filestream("../../001.jpg",filemode.open);
    / 使用文件流构造一个二进制读取器将基元数据读作二进制值
    binaryreader br = new binaryreader(fs);

    byte[] imagebuffer = new byte[br.basestream.length];

    br.read(imagebuffer,0,convert.toint32(br.basestream.length));

    string textstring = system.convert.tobase64string(imagebuffer);

    fs.close();
    br.close();

    xmltext text = myxmldoc.createtextnode(textstring);

    myxmldoc.documentelement.appendchild(elem);
    myxmldoc.documentelement.lastchild.appendchild(text);

    myxmldoc.save("../../docsave.xml");

    messagebox.show("读写结束！");
catch(exception ex)
   {
    messagebox.show(ex.tostring());
   }
/*************
/生成后的xml文档
/******

<picture>
  <name>picture</name>
  <image>......</image>
</picture>

/***********
/测试上一程序
/***********

说明：读取docsave.xml中的image节点,将其存为图片格式002.jpg.

  try
   {
    int readbyte = 0;
    int bytestoread = 1044;
    xmltextreader xmltxtrd = new xmltextreader("../../docsave.xml");
    filestream fs = new filestream("../../002.jpg",filemode.create);
    binarywriter bw = new binarywriter(fs);

    byte[] base64buffer = new byte[bytestoread];
    while(xmltxtrd.read())
    {
     if (xmltxtrd.nodetype == xmlnodetype.element !amp;!amp; xmltxtrd.name == "image")
     {
      do
      {
       readbyte = xmltxtrd.readbase64(base64buffer,0,bytestoread);
       bw.write(base64buffer,0,readbyte);
      }
      while( bytestoread<= readbyte);
     }
    }

    bw.flush();
    bw.close();
    fs.close();

    xmltxtrd.close();
    messagebox.show("读写结束！");
   }
  catch(exception ex)
   {
    messagebox.show(ex.tostring());
   }