将小写转换成大写金额

1.变量定义

        //大写数字
        private static String[] LargeNumber = { "零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖", "拾" };
        //金额单位
        private static String[] MoneyUnit = { "元", "拾", "佰", "仟", "万", "拾", "佰", "仟", "亿", "拾", "佰", "仟", "万" };
        //小数金额单位
        private static String[] SmallMoney = { "角", "分" };
        private static string moneySmall = string.Empty;
        private static string moneyBig = string.Empty;

2.转换方法

        /// <summary>  
        /// 金额小写转中文大写。  
        /// 整数支持到万亿；小数部分支持到分(超过两位将进行四舍五入法处理)  
        /// </summary>  
        /// <param name="Number">需要转换的双精度浮点数</param>  
        /// <returns>转换后的字符串</returns>  
        public static String MoneyUpper(Double Number)
        {
            //标记是否含有小数
            bool isContainsDecimal = false;
            //标记是否含有整数
            bool isCointainsInteger = true;
            //整个数字字符串
            string number;
            //整数部分  
            string number_integer;
            //小数部分 
            string number_decimal = string.Empty;
            //当前的数字字符  
            string number_present;
            //返回的字符串 
            string number_return = string.Empty;

            //四舍五入取两位
            Number = Math.Round(Number, 2);  

            //各种非正常情况处理  
            if (Number < 0)
            {
                return "请输入大于0的金额";
            }

            if (Number > 9999999999999.99)
            {
                return "金额已超过正常数字";
            }

            if (Number == 0)
            {
                return LargeNumber[0]+MoneyUnit[0]+"整";
            }

            //判断是否有整数  
            if (Number < 1.00)
            {
                isCointainsInteger = false;
            }

            number = Number.ToString();
            //默认只有整数部分  
            number_integer = number;

            if (number_integer.Contains("."))
            {
                //分开整数与小数处理  
                number_integer = number.Substring(0, number.IndexOf("."));
                number_decimal = number.Substring((number.IndexOf(".") + 1), (number.Length - number.IndexOf(".") - 1));
                isContainsDecimal = true;
            }

            if (number_decimal == "" || int.Parse(number_decimal) <= 0)
            {
                //判断是否含有小数部分  
                isContainsDecimal = false;
            }

            if (isCointainsInteger)
            {
                //整数部分处理  
                number_integer = Reversion(number_integer);//反转字符串  
                for (int i = 0; i <= number_integer.Length - 1; i++)
                {
                    //整数部分转换  
                    number_present = number_integer.Substring(i, 1);
                    if (int.Parse(number_present) != 0)
                    {
                        number_return = LargeNumber[int.Parse(number_present)] + MoneyUnit[i] + number_return;
                    }              
                }

                if (!isContainsDecimal)
                {
                    return number_return + "整";
                }
            }

            for (int j = 0; j < number_decimal.Length; j++)
            {
                //小数部分转换  
                number_present = number_decimal.Substring(j, 1);
                if (int.Parse(number_present) != 0)
                {
                    number_return += LargeNumber[int.Parse(number_present)] + SmallMoney[j];
                } 
            }

            return number_return;
        }

        /// <summary>
        /// 字符串反转
        /// </summary>
        /// <param name="NumStr_Zh"></param>
        /// <returns></returns>
        private static string Reversion(string str)
        {
            StringBuilder sb = new StringBuilder(str.Length);
            for (int i = str.Length - 1; i >= 0; i--)
            {
                sb.Append(str[i]);
            }
            return sb.ToString();
        }