把整数转化为ASCII字符

  //静态方法ConvCHAR()用于把整数转化为ASCII字符。
  //输入任意大于零的整数都可转换为大写的A-Z.

  public static string ConvCHAR(int pPosition)
  {
   string PreChar = "";
   if(pPosition > 26)
   {
    pPosition %= 26;
    PreChar = "A";
   }
   byte aByte = byte.Parse((pPosition + 64).ToString());
   byte[] bytes1 = {aByte,0x42,0x43};
   byte[] bytes2 = {0x98,0xe3};
   char[] chars = new char[3];
   Decoder d = Encoding.UTF8.GetDecoder();
   int charLen = d.GetChars(bytes1,0,bytes1.Length,chars,0);

   //The value of charLen should be 2 now.
   charLen += d.GetChars(bytes2,0,bytes2.Length,chars,charLen);
   foreach(char c in chars)
   {
    Console.WriteLine("U+" + ((ushort)c).ToString() +　　" ");
    return PreChar = c.ToString();
   }
   return "Need an entry";
  }