#region 小写金额转换为大写

        public static string CurrToChnNum(double Currnum)

        {

            string sResult = "";

            if (Math.Abs(Currnum) < 1e-20)

                return "零圆整";

            if (Currnum < 1e-20)

                sResult = "负";

            sResult = sResult + StringToChnNum(Math.Abs(Math.Round(Currnum, 2)).ToString());

            return sResult;

        }

        private static string FourNumToChnNum(string Str, string ChnNum, ref Boolean Pre)

        {

            string[] Digits = {"零", "壹", "贰", "叁", "肆",

                                     "伍", "陆", "柒", "捌", "玖"};

            int i, j, Len;

            string sResult = "";

            Len = Str.Length;

            for (i = 0; i < Len; i++)

            {

                j = Str[i] - 48;

                if (0 == j)

                    Pre = true;

                else

                {

                    if (Pre) sResult = sResult + "零";

                    sResult = sResult + Digits[j] + ChnNum.Substring(Len - i - 1, 1);

                    Pre = false;

                }

            }

            return sResult.Trim();

        }

        //将格式化好的小写串转换为大写串

        private static string StringToChnNum(string str)

        {

            const string ChnNum1 = "圆万亿兆";

            int i, Len, Len1, Level, Start;

            string s1; string s;

            Boolean Pre;

            string sResult = "";

            Len = str.IndexOf('.');

            Level = (Len + 3) / 4;

            Len1 = Len % 4;

            if (0 == Len1) Len1 = 4;

            Start = 0;

            for (i = 1; i <= Level; i++)

            {

                Pre = false;

                s = str.Substring(Start, Len1);

                s1 = FourNumToChnNum(s, " 拾佰仟", ref Pre);

                if (s1.Length > 0)

                    sResult = sResult + s1 + ChnNum1.Substring(Level - i, 1);

                Start = Start + Len1;

                Len1 = 4;

            }

            Pre = false;

            s1 = FourNumToChnNum(str.Substring(Len + 1, Math.Min(2, str.Length - Len - 1)), "分角", ref Pre);

            //s1 = "";

            if (s1.Length == 0)

                s1 = "整";

            sResult = sResult + s1;

            return sResult;

        }

        #endregion