c# 阿拉伯数字转成中文

调用方法：
 public string ConvertToChineseNumber(string old)
        {
            Chinese ch = new Chinese();
            long num = Convert.ToInt64(old);
            string re = ch.returnResult(num);
            if (re.StartsWith("壹拾"))
            {
                re = re.Substring(, re.Length - );
            }

            return (re);
        }

完整代码
using System;
using System.Collections.Generic;
using System.Text;

namespace Public
{
    class Chinese
    {
        public string returnResult(long num)
        {
            string numStr = num.ToString();
            if (numStr.Length >  & numStr.Length < )
            {
                string[] firstSplit = new string[];
                firstSplit[] = numStr.Substring(, numStr.Length - );
                firstSplit[] = numStr.Substring(numStr.Length - , );
                string result1 = getString(firstSplit[]) + "億";
                string result2 = getString(firstSplit[]);

                return result1 + result2;
            }
            else
            {
                return getString(numStr);
            }
        }

        public string getString(string str)
        {
            if (str.Length > )
            {
                string[] secondSplit = new string[];
                secondSplit[] = str.Substring(, str.Length - );
                secondSplit[] = str.Substring(str.Length - , );
                string result1 = getRe(secondSplit[]);
                string result2 = getRe(secondSplit[]);
                if (!secondSplit[].Equals(""))
                {
                    result1 += "萬";
                }

                return result1 + result2;
            }
            else
            {
                return getRe(str);

            }
        }

        int[] value = { , ,  };
        public string getRe(string doWith)
        {
            char[] number = doWith.ToCharArray();
            int length = number.Length;
            string re = "";

            for (int i = ; i < length; i++)
            {
                switch (number[i])
                {
                    case '':

                        if (re.EndsWith("零"))
                        {
                            re += "";
                        }
                        else
                        {
                            re += "零";
                        }

                        break;
                    case '':
                        re += "壹";
                        break;
                    case '':
                        re += "贰";
                        break;
                    case '':
                        re += "叁";
                        break;
                    case '':
                        re += "肆";
                        break;
                    case '':
                        re += "伍";
                        break;
                    case '':
                        re += "陆";
                        break;
                    case '':
                        re += "柒";
                        break;
                    case '':
                        re += "捌";
                        break;
                    case '':
                        re += "玖";
                        break;
                }

                int index = (int)Math.Pow(, length - i - );
                if (number[i].ToString() == "")
                {
                    index = -;
                }
                switch (index)
                {
                    case :
                        re += "仟";
                        break;
                    case :
                        re += "佰";
                        break;
                    case :
                        re += "拾";
                        break;
                }
            }

            if (re.EndsWith("零"))
            {
                re = re.Substring(, re.Length - );
            }
            return re;

        }
    }
}

http://files.cnblogs.com/files/louby/1279894919.rar