C# 数值转换中文大写

发票支票都要用到数值转换为中文大写，这里提供一个代码解决方案，此方法到兆为止，之前那个如果到亿以后当中很多个零的话就错了（亿以前是对的），现在改了，不过在纠结到底是“陆亿伍仟零叁拾贰圆整”还是“陆亿伍仟万零叁拾贰圆整”现在是前一钟

 

 

        public readonly string[] RMBUNIT = { "圆", "角", "分", "整" };        public readonly string[] CHINANUM = { "零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖" };        //个位因为没有单位所以是空字符        public readonly string[] CHINABIT = { string.Empty, "拾", "佰", "仟", "万", "亿", "兆" };        // 主方法将钱的数额传入返回大写中文         public string ToMoneyCNString(decimal money)        {            string[] unit = RMBUNIT;            string[] moneySplit = money.ToString().Split('.');            string intValue = string.Empty, minValue = string.Empty;            //转换小数点前“元”部分             if (moneySplit.Length > 0)                intValue = ToNumCNString(moneySplit[0].ToCharArray());            if (intValue.Length > 0)                intValue += unit[0];            //转换小数点后“角”和“分”部分            if (moneySplit.Length > 1)                for (int i = 0; i < moneySplit[1].Length; i++)                    minValue += CHINANUM[Convert.ToInt16(moneySplit[1][i].ToString())] + unit[i + 1];            return intValue + minValue + unit[3];        }        /// 将数字转换为中文大写数字         public string ToNumCNString(long num)        {            return ToNumCNString(num.ToString().ToCharArray());        }        public string ToNumCNString(char[] num)        {            int index = 0;            string strBig = string.Empty;            do            {                strBig += ToNumCNString(num, ref index);            } while (num.Length > 1 && index < num.Length - 1);            return strBig;        }        public string ToNumCNString(char[] num, ref int index)        {            char[] numChr = num;            string strBig = string.Empty;            string toChrZero = CHINANUM[0];            string bit = CHINABIT[firstCNStringIndex(minLen(numChr.Length - index))];            List<int> maxBit = readMaxBit(num);            bool blBit = false;            for (int i = index; i < numChr.Length; i++)            {                //如果当前数字是0，就要判断0是不是在最靠近他的单位位置                string cnBit = firstCNString(numChr.Length - i);                int bitIndex = firstCNStringIndex(minLen(numChr.Length - index));                index = i;                if (bit != CHINABIT[bitIndex])                    return strBig;                //判断如果是0同时又\是本位最大位或者等于万位要加单位(因为都是万位向上进)                if ('0' == numChr[i] &&                     !string.IsNullOrEmpty(strBig) &&                    (cnBit == bit || isBit(maxBit, cnBit)))                {                    blBit = true;                    strBig += cnBit;                }                else if ('0' != numChr[i])                {                    strBig += CHINANUM[Convert.ToInt16(numChr[i].ToString())] + cnBit;                }                if ('0' == numChr[i] && !strBig.EndsWith(toChrZero))                    if (cnBit == bit && !string.IsNullOrEmpty(strBig) ||                        string.IsNullOrEmpty(cnBit) ||                        i + 1 < numChr.Length && '0' != numChr[i + 1])                        if (!blBit)                            strBig += toChrZero;                blBit = false;            }            strBig = removeLastZero(strBig);            return strBig;        }        private bool isBit(List<int> list, string bit)        {            foreach (int node in list)                if (bit == CHINABIT[node])                    return true;            return false;        }        private List<int> readMaxBit(char[] num)        {            List<int> list = new List<int>();            for (int i = 0; i < num.Length; i++)            {                int max = firstCNStringIndex(minLen(num.Length - i));                max = max > 4 ? max - 1 : 4;                list.Add(max);            }            return list;        }        private string removeLastZero(string strBig)        {            if (strBig.EndsWith(CHINANUM[0]))                strBig = strBig.Remove(strBig.Length - 1);            return strBig;        }        private int firstCNStringIndex(int index)        {            switch (index)            {                case 1:                    return 0;                case 2:                    return 1;                case 3:                    return 2;                case 4:                    return 3;                case 5:                    return 4;                case 9:                    return 5;                case 17:                    return 6;            }            return -1;        }        private int firstCNStringLen(int len)        {            int index = firstCNStringIndex(len);            if (index < 0)                index = firstCNStringLen(len - minLen(len) + 1);            return index;        }        /// 查找单位是什么（佰，仟 等）传入的参数就是需要转换数字的位数长度（如100就是3）         private string firstCNString(int len)        {            if (0 == len)                return string.Empty;            int index = firstCNStringLen(len);            return CHINABIT[index];        }        /// 查找最靠近的单位的长度                private int minLen(int len)        {            int fontValue = 5;            int returnValue = 5;            while (true)            {                returnValue += (returnValue - 1);                if (returnValue > len)                    return fontValue;                fontValue = returnValue;            }        }