人民币大小写的转化
人民币大小写的转化
using System;
using System.Text;
using System.Text.RegularExpressions;
namespace HKH.Common
{
/// <summary>
/// 人民币大小写格式转换
/// </summary>
/// <remarks> 范中磊
/// </remarks>
public class clsRMB
{
private clsRMB()
{
}
#region 格式化
/// <summary>
/// 格式化（大写转小写）
/// </summary>
/// <param name="strRMB"></param>
/// <returns></returns>
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;
}
}
/// <summary>
/// 格式化（小写转大写）
/// </summary>
/// <param name="numRMB"></param>
/// <returns></returns>
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
/// <summary>
/// 计算表达式（大写表达式求值）
/// </summary>
/// <param name="strRMB"></param>
/// <returns></returns>
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;
}
}
/// <summary>
/// 计算表达式（小写数值求大写字符串）
/// </summary>
/// <param name="numRMB"></param>
/// <param name="iUnit"></param>
/// <returns></returns>
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 "";
}
}
/// <summary>
/// 将中文大写换成阿拉伯数字
/// </summary>
/// <param name="strRMB"></param>
/// <param name="toUpper">true--转换为大写/false--转换为小写</param>
/// <returns></returns>
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;
}
/// <summary>
/// 获取单位名称
/// </summary>
/// <param name="iCode"></param>
/// <returns></returns>
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 "";
}
}
/// <summary>
/// 获取位权指数
/// </summary>
/// <param name="cUnit"></param>
/// <returns></returns>
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
}
}
