[C#]数字到大写中文的转换(Money)

using System;

namespace xxxxxxx
...{
    /**//// <summary>
    /// 本类实现阿拉伯数字到大写中文的转换
    /// 该类没有对非法数字进行判别
    /// 请调用NumToChn方法
    /// </summary>
    public class Money
    ...{
        /**//// <summary>
        /// 金额类
        /// </summary>
        public Money()
        ...{
        
        }
        private static char chrToNum(char x)
        ...{
            string chnNames="零壹贰叁肆伍陆柒捌玖";
            string numNames="0123456789";
            return chnNames[numNames.IndexOf(x)];
        }
        private static string TenthousandToNum(string x)
        ...{
            string[] stringArrayLevelNames=new string[4] ...{"","拾","佰","仟"};
            string ret="";
            int i;
            for (i=x.Length-1;i>=0;i--)
                if (x[i]=='0')
                    ret=chrToNum(x[i])+ret;
                else
                    ret=chrToNum(x[i])+stringArrayLevelNames[x.Length-1-i]+ret;
            while ((i=ret.IndexOf("零零"))!=-1)
                ret=ret.Remove(i,1);
            if (ret[ret.Length-1]=='零' && ret.Length>1)
                ret=ret.Remove(ret.Length-1,1);
            //            if (ret.Length>=2 && ret.Substring(0,2)=="壹拾")
            //                ret=ret.Remove(0,1);
            return ret;
        }
        private static string chgIntegerPart(string x)
        ...{
            int len=x.Length;
            string ret,temp;
            if (len<=4)
                ret=TenthousandToNum(x);
            else if (len<=8)
            ...{
                ret=TenthousandToNum(x.Substring(0,len-4))+"万";
                temp=TenthousandToNum(x.Substring(len-4,4));
                if (temp.IndexOf("仟")==-1 && temp!="")
                    ret+="零"+temp;
                else
                    ret+=temp;
            }
            else
            ...{
                ret=TenthousandToNum(x.Substring(0,len-8))+"亿";
                temp=TenthousandToNum(x.Substring(len-8,4));
                if (temp.IndexOf("仟")==-1 && temp!="")
                    ret+="零"+temp;
                else
                    ret+=temp;
                ret+="万";
                temp=TenthousandToNum(x.Substring(len-4,4));
                if (temp.IndexOf("仟")==-1 && temp!="")
                    ret+="零"+temp;
                else
                    ret+=temp;
            }
            int i;
            if ((i=ret.IndexOf("零万"))!=-1)
                ret=ret.Remove(i+1,1);
            while ((i=ret.IndexOf("零零"))!=-1)
                ret=ret.Remove(i,1);
            if (ret[ret.Length-1]=='零' && ret.Length>1)
                ret=ret.Remove(ret.Length-1,1);
            return ret;
        }

        private static string chgDecimalPart(string x)
        ...{
            string ret="";
            for (int i=0;i<x.Length && i<2;i++)
            ...{
                switch(i)
                ...{
                    case 0:
                        ret+=chrToNum(x[i])+"角";
                        break;
                    case 1:
                        ret+=chrToNum(x[i])+"分";
                        break;
                }
            }
            return ret;
        }
        /**//// <summary>
        /// 将阿拉伯小写金额转换成大写金额
        /// </summary>
        /// <param name="x"></param>
        /// <returns></returns>
        public static string NumToChn(string x)
        ...{
            if (x.Length==0)
                return "";
            string ret="";
            if (x[0]=='-')
            ...{
                ret="负";
                x=x.Remove(0,1);
            }
            if (x[0].ToString()==".")
                x="0"+x;
            if (x[x.Length-1].ToString()==".")
                x=x.Remove(x.Length-1,1);
            //if (x.IndexOf(".")>-1) 2005-09-13,Szg,Modify
            if (x.IndexOf(".")>-1)
            ...{
                if(Convert.ToDecimal("0"+x.Substring(x.IndexOf(".")))>0)
                ...{
                    ret+=chgIntegerPart(x.Substring(0,x.IndexOf(".")))+"元"+chgDecimalPart(x.Substring(x.IndexOf(".")+1));
                }
                else
                ...{
                    ret+=chgIntegerPart(Convert.ToDecimal(x).ToString("0"))+"元整";
                }
            }
            else
            ...{
                ret+=chgIntegerPart(x)+"元整";
            }
            return ret;
        }
    }
    /**//* END CLASS DEFINITION Money */
}