£ £ Í¼°ËÖдúÂëÑÝʾÁË°ÑÒ»¸östringÊý¾Ýת»»ÎªBase64 ±àÂëµÄXMLÁ÷¡£Í¼¾ÅÊÇÊä³öµÄ½á¹û¡£


Figure 8 Persisting a String Array as Base64

using System;

using System.Text;

using System.IO;

using System.XML;



class MyBase64Array

{

public static void Main(String[] args)

{

string outputFileName = "test64.XML";

if (args.Length > 0)

outputFileName = args[0]; // file name



// °ÑÊý×éת»»³ÉXML

String[] theArray = {"Rome", "New York", "Sydney", "Stockholm",

"Paris"};



CreateOutput(theArray, outputFileName);

return;

}



private static void CreateOutput(string[] theArray, string filename)

{

// ´ò¿ªXML writer

XMLTextWriter XMLw = new XMLTextWriter(filename, null);

//ʹ×ÓÔªËظù¾Ý Indentation ºÍ IndentChar ÉèÖÃËõ½ø¡£´ËÑ¡ÏîÖ»¶ÔÔªËØÄÚÈݽøÐÐËõ½ø

XMLw.Formatting = Formatting.Indented;

//Êéд°æ±¾Îª¡°1.0¡±µÄ XML ÉùÃ÷

XMLw.WriteStartDocument();

//д³ö°üº¬Ö¸¶¨Îı¾µÄ×¢ÊÍ <--...-->¡£

XMLw.WriteComment("Array to Base64 XML");

//¿ªÊ¼Ð´³öarray½Úµã

XMLw.WriteStartElement("array");

//д³ö¾ßÓÐÖ¸¶¨µÄǰ׺¡¢±¾µØÃû³Æ¡¢ÃüÃû¿Õ¼ä URI ºÍÖµµÄÊôÐÔ

XMLw.WriteAttributeString("XMLns", "x", null, "dinoe:msdn-mag");

// Ñ­»·µÄдÈëarrayµÄ×Ó½Úµã

foreach(string s in theArray)

{

//д³öÖ¸¶¨µÄ¿ªÊ¼±ê¼Ç²¢½«ÆäÓë¸ø¶¨µÄÃüÃû¿Õ¼äºÍǰ׺¹ØÁªÆðÀ´

XMLw.WriteStartElement("x", "element", null);

//°ÑSת»»³Ébyte[]Êý×é, ²¢°Ñbyte[]Êý×é±àÂëΪ Base64 ²¢Ð´³ö½á¹ûÎı¾£¬ÒªÐ´ÈëµÄ×Ö½ÚÊýΪs×ܳ¤¶ÈµÄ2±¶,Ò»¸östringÕ¼µÄ×Ö½ÚÊýÊÇ2×Ö½Ú¡£

XMLw.WriteBase64(Encoding.Unicode.GetBytes(s), 0, s.Length*2);

//¹Ø±Õ×Ó½Úµã

XMLw.WriteEndElement();

}

//¹Ø±Õ¸ù½Úµã£¬Ö»ÓÐÁ½¼¶

XMLw.WriteEndDocument();



// ¹Ø±Õwriter

XMLw.Close();



// ¶Á³öдÈëµÄÄÚÈÝ

XMLTextReader reader = new XMLTextReader(filname);

while(reader.Read())

{

//»ñÈ¡½ÚµãÃûΪelementµÄ½Úµã

if (reader.LocalName == "element")

{



byte[] bytes = new byte[1000];

int n = reader.ReadBase64(bytes, 0, 1000);

string buf = Encoding.Unicode.GetString(bytes);



Console.WriteLine(buf.Substring(0,n));

}

}

reader.Close();



}

}