.net获取传输的string类型转化成拼音码

using System;
using System.Collections.Generic;
using System.Text;

namespace WinP.Common
{
    public class GetPym
    {
        /// <summary>    
        /// 生成拼音简码    
        /// </summary>    
        /// <param name="unicodeString">Unicode编码字符串</param>    
        /// <returns>拼音简码:string</returns>    
        public static string GetPinyinCode(string unicodeString)
        {
            int i = 0;
            ushort key = 0;
            string strResult = string.Empty;            //创建两个不同的encoding对象    
            Encoding unicode = Encoding.Unicode;
            //创建GBK码对象    
            Encoding gbk = Encoding.GetEncoding(936);
            //将unicode字符串转换为字节    
            byte[] unicodeBytes = unicode.GetBytes(unicodeString);
            //再转化为GBK码    
            byte[] gbkBytes = Encoding.Convert(unicode, gbk, unicodeBytes);
            while (i < gbkBytes.Length)
            {
                //如果为数字字母其他ASCII符号    
                if (gbkBytes[i] <= 127)
                {