/// <summary>
        /// 汉字转拼音缩写 (字符串) (小写)
        /// </summary>
        /// <param name="str">要转换的汉字字符串</param>
        /// <returns>拼音缩写</returns>
        public static string GetSpellStringLower(string str)
        {
            string text = "";

            for (int i = 0; i < str.Length; i++)
            {
                char c = str[i];
                if (c >= '!' && c <= '~')
                {
                    text += c.ToString();
                }
                else
                {
                    text += Chinese2Spell.GetSpellCharLower(c.ToString());
                }
            }
            return(text);
        }
        /// <summary>
        /// 汉字转拼音缩写 (字符串) (小写) (空格间隔)
        /// </summary>
        /// <param name="str">要转换的汉字字符串</param>
        /// <returns>拼音缩写</returns>
        public static string GetSpellStringLowerSplitWithBlank(string str)
        {
            string text = "";

            for (int i = 0; i < str.Length; i++)
            {
                char c = str[i];
                if (c >= '!' && c <= '~')
                {
                    text = text + " " + c.ToString();
                }
                else
                {
                    text = text + " " + Chinese2Spell.GetSpellCharLower(c.ToString());
                }
            }
            return(text.Trim());
        }
        /// <summary>
        /// 汉字转拼音缩写 (大写)
        /// </summary>
        /// <param name="str">要转换的汉字字符串</param>
        /// <returns>拼音缩写</returns>
        public static string GetSpellStringSupper(string str)
        {
            string text = "";

            for (int i = 0; i < str.Length; i++)
            {
                char c = str[i];
                if (c >= '!' && c <= '~')
                {
                    //字母和符号原样保留
                    text += c.ToString();
                }
                else
                {
                    //累加拼音声母
                    text += Chinese2Spell.GetSpellCharSupper(c.ToString());
                }
            }
            return(text);
        }