根据汉字获取它的字符串拼音首字母(大写)，含多音字

  /// <summary>
        /// 根据汉字获取它的字符串拼音首字母(大写)，含多音字
        /// </summary>
        /// <param name="chineseStr"></param>
        /// <returns></returns>
        public static string GetFirstSpellByChinese(string chineseStr)
        {
            int i, j, k, m;
            string tmpStr;
            string returnStr = "";  //返回最终结果的字符串
            string[] tmpArr;
            for (i = 0; i < chineseStr.Length; i++)
            {   //处理汉字字符串,对每个汉字的首字母进行一次循环
                tmpStr = GetShellByChinese((char)chineseStr[i]);   //获取第i个汉字的拼音首字母,可能为1个或多个
                if (tmpStr.Length > 0)
                {   //汉字的拼音首字母存在的情况才进行操作
                    if (returnStr != "")
                    {   //不是第一个汉字
                        Regex regex = new Regex(",");
                        tmpArr = regex.Split(returnStr);
                        returnStr = "";
                        for (k = 0; k < tmpArr.Length; k++)
                        {
                            for (j = 0; j < tmpStr.Length; j++)    //对返回的每个首字母进行拼接
                            {
                                string charcode = tmpStr[j].ToString(); //取出第j个拼音字母
                                returnStr += tmpArr[k] + charcode + ",";
                            }
                        }
                        if (returnStr != "")
                            returnStr = returnStr.Substring(0, returnStr.Length - 1);
                    }
                    else
                    {   //构造第一个汉字返回结果
                        for (m = 0; m < tmpStr.Length - 1; m++)
                            returnStr += tmpStr[m] + ",";
                        returnStr += tmpStr[tmpStr.Length - 1];
                    }
                }
            }
            return returnStr;   //返回处理结果字符串，以，分隔每个拼音组合
        }
        /// <summary>
        /// 获取单个汉字对应的拼音首字符字符串
        /// </summary>
        /// <param name="chineseCh"></param>
        /// <returns></returns>
        private static string GetShellByChinese(char chineseCh)
        {
            // 汉字拼音首字母列表 本列表包含了20902个汉字,收录的字符的Unicode编码范围为19968至40869
            string strChineseFirstPY = 
            //此处收录了375个多音字
            string MultiPinyin = 
            string resStr = "";
            int i, j, uni;
            uni = (UInt16)chineseCh;
            if (uni > 40869 || uni < 19968)
                return resStr;
            //返回该字符在Unicode字符集中的编码值
            i = MultiPinyin.IndexOf(uni.ToString());
            //检查是否是多音字,是按多音字处理,不是就直接在strChineseFirstPY字符串中找对应的首字母
            if (i < 0)
            //获取非多音字汉字首字母
            {
                resStr = strChineseFirstPY[uni - 19968].ToString();
            }
            else
            {   //获取多音字汉字首字母
                j = MultiPinyin.IndexOf(",", i);
                resStr = MultiPinyin.Substring(i + 6, j - i - 6);
            }

               return resStr;
        }