Byte[]和BASE64之间的转换操作

摘自http://www.cnblogs.com/chnking/archive/2007/08/12/852669.html 

 Byte[]和BASE64之间的转换操作

static void Main(string[] args)

{

    string factString = "中华人民共和国";

    byte[] myByte;

    string Base64Str;

    //先把字符串按照utf-8的编码转换成byte[]

    Encoding myEncoding = Encoding.GetEncoding("utf-8");

    //myByte中获得这样的字节数组：228,184,173,229,141,142,228,186,186,230,176,145,229,133,177,229,146,140,229,155,189

    myByte = myEncoding.GetBytes(factString);

    //把byte[]转成base64编码,这个例子形成的base64编码的unicode等价字符串为:"5Lit5Y2O5Lq65rCR5YWx5ZKM5Zu9"

    Base64Str = Convert.ToBase64String(myByte);

    //再从base64编码转成byte[]，又恢复为字节数组：228,184,173,229,141,142,228,186,186,230,176,145,229,133,177,229,146,140,229,155,189

    myByte = Convert.FromBase64String(Base64Str);

    //用同一个Encoding对象把byte[]转成字符串："中华人民共和国"

    factString = myEncoding.GetString(myByte);

    Console.WriteLine(factString);

}