人民币大小写转换
using System;
using System.Text;
using System.Text.RegularExpressions;
namespace HKH.Common
{
///
/// 人民币大小写格式转换
///
///
///
public class clsRMB
{
private clsRMB()
{
}
#region 格式化
///
/// 格式化（大写转小写）
///
///
///
public static double Format(string strRMB)
{
try
{
//正则表达式，验证第一位是否阿拉伯数字，确定转换格式
//1.5亿----混写格式
if(Regex.IsMatch(strRMB,"^//d"))
{
//去掉元单位
strRMB = Regex.Replace(strRMB,"元|圆","");
char temp = strRMB[strRMB.Length - 1];
if (temp == '万' || temp == '萬' || temp == '亿')
{
return Convert.ToDouble(strRMB.Substring(0,strRMB.Length - 1)) * Math.Pow(10,GetExp(temp));
}
else
{
return Convert.ToDouble(strRMB);
}
}
//壹亿伍千万-----大写格式
else
{
return Eval(strRMB);
}
}
catch
{
return -1;
}
}
///
/// 格式化（小写转大写）
///
///
///
public static string Format(double numRMB)
{
try
{
if( 0 == numRMB)
return "零元整";
StringBuilder szRMB = new StringBuilder();
//乘100以格式成整型，便于处理
ulong iRMB = Convert.ToUInt64(numRMB * 100);
szRMB.Insert(0,ToUpper(Convert.ToInt32(iRMB % 100),-2));
//去掉原来的小数位
iRMB = iRMB / 100;
int iUnit = 0;
//以每4位为一个单位段进行处理，所以下边除以10000
while(iRMB != 0)
{
szRMB.Insert(0,ToUpper(Convert.ToInt32(iRMB % 10000),iUnit ));
iRMB = iRMB / 10000;
iUnit += 4;
}
string strRMB = szRMB.ToString();
//格式修正
strRMB = Regex.Replace(strRMB,"零+","零");
strRMB = strRMB.Replace("元零整","元整");
strRMB = strRMB.Replace("零元","元");
return strRMB.Trim('零');
}
catch
{
return "";
}
}
#endregion
#region 私有方法
///
/// 计算表达式（大写表达式求值）
///
///
///
private static double Eval(string strRMB)
{
try
{
if (null == strRMB )
return 0;
strRMB = Replace(strRMB,false);
if ("" == strRMB)
return 0;
#region 利用位权进行计算
//基础指数
int basicExp = 0;
//当前指数
int currExp = 0;
double numRMB = 0;
for(int i = strRMB.Length - 1; i > -1 ; i --)
{
char temp = strRMB[i];
if (temp == '元' || temp == '万' || temp == '亿' || temp == '圆' || temp == '萬' )
{
basicExp = GetExp(temp);
currExp = 0;
continue;
}
else
{
if(Regex.IsMatch(temp.ToString(),"^//d"))
{
numRMB = numRMB + Convert.ToInt32(temp.ToString()) * Math.Pow(10,(basicExp + currExp));
}
else
{
currExp = GetExp(temp);
}
}
}
#endregion
return numRMB;
}
catch
{
return -1;
}
}
///
/// 计算表达式（小写数值求大写字符串）
///
///
///
///
private static string ToUpper(int numRMB,int iUnit)
{
try
{
if( 0 == numRMB )
{
if (iUnit == -2)
{
return "整";
}
if (iUnit == 0)
{
return "元";
}
return "零";
}
StringBuilder szRMB = new StringBuilder();
string strRMB = "";
#region 对角/分做特殊处理
if (iUnit == -2)
{
int jiao = numRMB / 10;
int fen = numRMB % 10;
if (jiao > 0)
{
szRMB.Append(jiao);
szRMB.Append(GetUnit(-1));
if ( fen > 0)
{
szRMB.Append(fen);
szRMB.Append(GetUnit(-2));
}
}
else
{
szRMB.Append(fen);
szRMB.Append(GetUnit(-2));
}
return Replace(szRMB.ToString(),true);
}
#endregion
#region 以下为整数部分正常处理
strRMB = numRMB.ToString("0000");
//前一位是否是0
bool hasZero = false;
for ( int i = 0; i < strRMB.Length; i++ )
{
//只有四位，最高位为‘千’，所以下边的3-i为单位修正
if ( ( 3-i ) > 0)
{
if( '0' != strRMB[i] )
{
szRMB.Append(strRMB[i]);
szRMB.Append(GetUnit( 3-i ));
hasZero = false;
}
else
{
if( !hasZero )
szRMB.Append(strRMB[i]);
hasZero = true;
}
}
//最后一位，特别格式处理
//如最后一位是零，则单位应在零之前
else
{
if( '0' != strRMB[i] )
{
szRMB.Append(strRMB[i]);
szRMB.Append(GetUnit( iUnit ));
hasZero = false;
}
else
{
if (hasZero)
{
szRMB.Insert(szRMB.Length - 1,GetUnit( iUnit ));
}
else
{
szRMB.Append(GetUnit( iUnit ));
szRMB.Append(strRMB[i]);
}
}
}
}
//转换大写后返回
return Replace(szRMB.ToString(),true);
#endregion
}
catch
{
return "";
}
}
///
/// 将中文大写换成阿拉伯数字
///
///
/// true--转换为大写/false--转换为小写
///
private static string Replace(string strRMB,bool toUpper)
{
if(toUpper)
{
strRMB = strRMB.Replace("0","零");
strRMB = strRMB.Replace("1","壹");
strRMB = strRMB.Replace("2","贰");
strRMB = strRMB.Replace("3","叁");
strRMB = strRMB.Replace("4","肆");
strRMB = strRMB.Replace("5","伍");
strRMB = strRMB.Replace("6","陆");
strRMB = strRMB.Replace("7","柒");
strRMB = strRMB.Replace("8","捌");
strRMB = strRMB.Replace("9","玖");
}
else
{
strRMB = strRMB.Replace("零","0");
strRMB = strRMB.Replace("壹","1");
strRMB = strRMB.Replace("贰","2");
strRMB = strRMB.Replace("叁","3");
strRMB = strRMB.Replace("肆","4");
strRMB = strRMB.Replace("伍","5");
strRMB = strRMB.Replace("陆","6");
strRMB = strRMB.Replace("柒","7");
strRMB = strRMB.Replace("捌","8");
strRMB = strRMB.Replace("玖","9");
}
return strRMB;
}
///
/// 获取单位名称
///
///
///
private static string GetUnit(int iCode)
{
switch(iCode)
{
case -2:
return "分";
case -1:
return "角";
case 0:
return "元";
case 1:
return "拾";
case 2:
return "佰";
case 3:
return "仟";
case 4:
return "萬";
case 8:
return "亿";
default:
return "";
}
}
///
/// 获取位权指数
///
///
///
private static int GetExp(char cUnit )
{
switch(cUnit)
{
case '分':
return -2;
case '角':
return -1;
case '元':
case '圆':
return 0;
case '十':
case '拾':
return 1;
case '百':
case '佰':
return 2;
case '千':
case '仟':
return 3;
case '万':
case '萬':
return 4;
case '亿':
return 8;
default:
return 0;
}
}
#endregion
}
}