最多两位小数,如123.45的转换结果为:壹百贰拾叁元肆角伍分

 /// <summary>

        /// public static string ToUpper(decimal d)：小写金额转换为大写金额，其他条件：金额小于一万亿，

        /// 最多两位小数,如123.45的转换结果为:壹百贰拾叁元肆角伍分

        /// </summary>

        /// <param name="d">源金额，d 《 1000000000000.00(一万亿)，且最多两位小数 </param>

        /// <returns>结果，大写金额</returns>

        public static string ToUpper(decimal d)

        {

            if (d == 0)

                return "零元整";



            string je = d.ToString("####.00");

            if (je.Length > 15)

                return "";

            je = new String('0', 15 - je.Length) + je;                        //若小于15位长，前面补0



            string stry = je.Substring(0, 4);                                //取得'亿'单元

            string strw = je.Substring(4, 4);                                //取得'万'单元

            string strg = je.Substring(8, 4);                                //取得'元'单元

            string strf = je.Substring(13, 2);                                //取得小数部分



            string str1 = "", str2 = "", str3 = "";



            str1 = getupper(stry, "亿");                                //亿单元的大写

            str2 = getupper(strw, "万");                                //万单元的大写

            str3 = getupper(strg, "元");                                //元单元的大写





            string str_y = "", str_w = "";

            if (je[3] == '0' || je[4] == '0')                                //亿和万之间是否有0

                str_y = "零";

            if (je[7] == '0' || je[8] == '0')                                //万和元之间是否有0

                str_w = "零";







            string ret = str1 + str_y + str2 + str_w + str3;                //亿，万，元的三个大写合并



            for (int i = 0; i < ret.Length; i++)                                //去掉前面的"零"            

            {

                if (ret[i] != '零')

                {

                    ret = ret.Substring(i);

                    break;

                }



            }

            for (int i = ret.Length - 1; i > -1; i--)                        //去掉最后的"零"    

            {

                if (ret[i] != '零')

                {

                    ret = ret.Substring(0, i + 1);

                    break;

                }

            }



            if (ret[ret.Length - 1] != '元')                                //若最后不位不是'元'，则加一个'元'字

                ret = ret + "元";



            if (ret == "零零元")                                            //若为零元，则去掉"元数"，结果只要小数部分

                ret = "";



            if (strf == "00")                                                //下面是小数部分的转换

            {

                ret = ret + "整";

            }

            else

            {

                string tmp = "";

                tmp = getint(strf[0]);

                if (tmp == "零")

                    ret = ret + tmp;

                else

                    ret = ret + tmp + "角";



                tmp = getint(strf[1]);

                if (tmp == "零")

                    ret = ret + "整";

                else

                    ret = ret + tmp + "分";

            }



            if (ret[0] == '零')

            {

                ret = ret.Substring(1);                                        //防止0.03转为"零叁分"，而直接转为"叁分"

            }



            return ret;                                                    //完成，返回





        }

        /// <summary>

        /// private static string getupper(string str,string strDW)：

        /// 把一个单元转为大写，如亿单元，万单元，个单元

        /// </summary>

        /// <param name="str">这个单元的小写数字（4位长，若不足，则前面补零）</param>

        /// <param name="strDW">亿，万，元</param>

        /// <returns>转换结果</returns>

        private static string getupper(string str, string strDW)

        {

            if (str == "0000")

                return "";



            string ret = "";

            string tmp1 = getint(str[0]);

            string tmp2 = getint(str[1]);

            string tmp3 = getint(str[2]);

            string tmp4 = getint(str[3]);

            if (tmp1 != "零")

            {

                ret = ret + tmp1 + "仟";

            }

            else

            {

                ret = ret + tmp1;

            }



            if (tmp2 != "零")

            {

                ret = ret + tmp2 + "佰";

            }

            else

            {

                if (tmp1 != "零")                                            //保证若有两个零'00'，结果只有一个零，下同

                    ret = ret + tmp2;

            }



            if (tmp3 != "零")

            {

                ret = ret + tmp3 + "拾";

            }

            else

            {

                if (tmp2 != "零")

                    ret = ret + tmp3;

            }



            if (tmp4 != "零")

            {

                ret = ret + tmp4;

            }



            if (ret[0] == '零')                                                //若第一个字符是'零'，则去掉

                ret = ret.Substring(1);

            if (ret[ret.Length - 1] == '零')                                //若最后一个字符是'零'，则去掉

                ret = ret.Substring(0, ret.Length - 1);



            return ret + strDW;                                                //加上本单元的单位



        }

        /// <summary>

        /// private static string getint(char c)：单个数字转为大写

        /// </summary>

        /// <param name="c">小写阿拉伯数字 0---9</param>

        /// <returns>大写数字</returns>

        private static string getint(char c)

        {

            string str = "";

            switch (c)

            {

                case '0':

                    str = "零";

                    break;

                case '1':

                    str = "壹";

                    break;

                case '2':

                    str = "贰";

                    break;

                case '3':

                    str = "叁";

                    break;

                case '4':

                    str = "肆";

                    break;

                case '5':

                    str = "伍";

                    break;

                case '6':

                    str = "陆";

                    break;

                case '7':

                    str = "柒";

                    break;

                case '8':

                    str = "捌";

                    break;

                case '9':

                    str = "玖";

                    break;

            }

            return str;

        }

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