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C#把金额转换为汉字表达式

/*
* 创建日期: 2014年09月04号
* 功能:Money类型转换
*
*/

namespace Net.String.ConsoleApplication
{
using System;
using System.Collections.Generic;

    public class MoneyHelper
{
public static string[] chineseDigits = new string[] { "零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖" };

        /// <summary>
/// 把金额转换为汉字表示的数量,小数点后四舍五入保留两位
/// </summary>
/// <param name="amount">小写金额</param>
/// <returns>人民币大写</returns>
public static string amountToChinese(decimal amount)
{
if (amount > 99999999999999.99m || amount < -99999999999999.99m)
{
throw new Exception("参数值超出允许范围 (-99999999999999.99 ~ 99999999999999.99)!");
}
// 如果是负数,先转换为正数
bool negative = false;
if (amount < 0)
{
negative = true;
amount = amount * (-1);
}
// 乘以100再进行四舍五入,实现小数保留2位
decimal temp_r = Round(amount, 2);
int temp = Convert.ToInt32(temp_r * 100);
int numFen = (int)(temp % 10);    // 分
temp = temp / 10;
int numJiao = (int)(temp % 10);   // 角
temp = temp / 10;
// temp 目前是金额的整数部分
//
int[] parts = new int[20]; // 其中的元素是把原来金额整数部分分割为值在 0~9999 之间的数的各个部分
int numParts = 0;          // 记录把原来金额整数部分分割为了几个部分(每部分都在 0~9999 之间)
for (int i = 0; ; i++)
{
if (temp == 0)
{
break;
}
int part = (int)(temp % 10000);
parts[i] = part;
numParts++;
temp = temp / 10000;
}
//
bool beforeWanIsZero = true; // 标志“万”下面一级是不是 0
string chineseStr = "";
for (int i = 0; i < numParts; i++)
{
string partChinese = partTranslate(parts[i]);

                if (i % 2 == 0)
{
if ("".Equals(partChinese))
{
beforeWanIsZero = true;
}
else
{
beforeWanIsZero = false;
}
}

                if (i != 0)
{
if (i % 2 == 0)
{
chineseStr = "亿" + chineseStr;
}
else
{
// 如果“万”对应的part为0,而“万”下面一级不为0,则不加“万”,而加“零”
if ("".Equals(partChinese) && !beforeWanIsZero)
{
chineseStr = "零" + chineseStr;
}
else
{
// 如果"万"的部分不为0,而"万"前面的部分小于1000大于0,则万后面应该跟“零”
if (parts[i - 1] < 1000 && parts[i - 1] > 0)
{
chineseStr = "零" + chineseStr;
}
chineseStr = "万" + chineseStr;
}
}
}
chineseStr = partChinese + chineseStr;
}

            // 最后处理
if ("".Equals(chineseStr))  // 整数部分为 0, 则表达为"零元"
{
chineseStr = chineseDigits[0];
}
else if (negative)          // 整数部分不为 0, 并且原金额为负数
{
chineseStr = "负" + chineseStr;
}
chineseStr = chineseStr + "元";
if ((numFen == 0) && (numJiao == 0))
{
chineseStr = chineseStr + "整";
}
else if (numFen == 0)  // 0 分,角数不为 0
{
chineseStr = chineseStr + chineseDigits[numJiao] + "角";
}
else                   // “分”数不为 0
{
if (numJiao == 0)
{
chineseStr = chineseStr + "零" + chineseDigits[numFen] + "分";
}
else
{
chineseStr = chineseStr + chineseDigits[numJiao] + "角" + chineseDigits[numFen] + "分";
}
}
return chineseStr;
}

        /// <summary>
/// 把一个 0~9999 之间的整数转换为汉字的字符串,如果是 0 则返回 ""
/// </summary>
/// <param name="amountPart"></param>
/// <returns></returns>
public static string partTranslate(int amountPart)
{
if (amountPart < 0 || amountPart >= 10000)
{
throw new Exception("参数必须是大于等于 0,小于 10000 的整数!");
}

            string[] units = new string[] { "", "拾", "佰", "仟" };

            int temp = amountPart;

            string amountStr = amountPart.ToString();
int amountStrLength = amountStr.Length;

            bool lastIsZero = true; // 在从低位往高位循环时,记录上一位数字是不是 0
string chineseStr = "";

            for (int i = 0; i < amountStrLength; i++)
{
if (temp == 0) // 高位已无数据
{
break;
}
int digit = temp % 10;
if (digit == 0) // 取到的数字为 0
{
if (!lastIsZero) // 前一个数字不是 0,则在当前汉字串前加“零”字;
{
chineseStr = "零" + chineseStr;
}
lastIsZero = true;
}
else   // 取到的数字不是 0
{
chineseStr = chineseDigits[digit] + units[i] + chineseStr;
lastIsZero = false;
}
temp = temp / 10;
}
return chineseStr;
}

        public static decimal Round(decimal data, int digits)
{
double i = Math.Pow(10, digits);
decimal temp = (data * (decimal)(i));
int intData = (int)temp;
decimal digData = temp - intData;

            if (digData >= decimal.Parse("0.5"))
intData++;
string format = digits > 0 ? "0." : "0";
for (int n = 0; n < digits; n++)
{
format += "0";
}
return Convert.ToDecimal(((decimal)(intData / i)).ToString(format));

        }

/// <summary>
/// 把金额转换为汉字表示
/// </summary>
public static string RMBEncode(decimal num)
{
try
{
#region
string str1 = "零壹贰叁肆伍陆柒捌玖";            //0-9所对应的汉字
string str2 = "万仟佰拾亿仟佰拾万仟佰拾元角分"; //数字位所对应的汉字
string str3 = "";    //从原num值中取出的值
string str4 = "";    //数字的字符串形式
string str5 = "";  //人民币大写金额形式
int i;    //循环变量
int j;    //num的值乘以100的字符串长度
string ch1 = "";    //数字的汉语读法
string ch2 = "";    //数字位的汉字读法
int nzero = 0;  //用来计算连续的零值是几个
int temp;            //从原num值中取出的值

                num = Math.Round(Math.Abs(num), 2);    //将num取绝对值并四舍五入取2位小数
str4 = ((long)(num * 100)).ToString();        //将num乘100并转换成字符串形式
j = str4.Length;      //找出最高位
if (j > 15) { return "溢出"; }
str2 = str2.Substring(15 - j);   //取出对应位数的str2的值。如:200.55,j为5所以str2=佰拾元角分

                #endregion
//循环取出每一位需要转换的值
for (i = 0; i < j; i++)
{
#region
str3 = str4.Substring(i, 1);          //取出需转换的某一位的值
temp = Convert.ToInt32(str3);      //转换为数字
if (i != (j - 3) && i != (j - 7) && i != (j - 11) && i != (j - 15))
{
#region
if (str3 == "0")
{
ch1 = "";
ch2 = "";
nzero = nzero + 1;
}
else
{
if (str3 != "0" && nzero != 0)
{
ch1 = "零" + str1.Substring(temp * 1, 1);
ch2 = str2.Substring(i, 1);
nzero = 0;
}
else
{
ch1 = str1.Substring(temp * 1, 1);
ch2 = str2.Substring(i, 1);
nzero = 0;
}
}
#endregion
}
else
{
#region
if (str3 != "0" && nzero != 0)
{
ch1 = "零" + str1.Substring(temp * 1, 1);
ch2 = str2.Substring(i, 1);
nzero = 0;
}
else
{
if (str3 != "0" && nzero == 0)
{
ch1 = str1.Substring(temp * 1, 1);
ch2 = str2.Substring(i, 1);
nzero = 0;
}
else
{
#region
if (str3 == "0" && nzero >= 3)
{
ch1 = "";
ch2 = "";
nzero = nzero + 1;
}
else
{
if (j >= 11)
{
ch1 = "";
nzero = nzero + 1;
}
else
{
ch1 = "";
ch2 = str2.Substring(i, 1);
nzero = nzero + 1;
}
}
#endregion
}
}
#endregion
}
if (i == (j - 11) || i == (j - 3))
{
ch2 = str2.Substring(i, 1);
}
str5 = str5 + ch1 + ch2;

                    if (i == j - 1 && str3 == "0")
{
str5 = str5 + '整';
}
#endregion
}
if (num == 0)
{
str5 = "零元整";
}
return str5;
}
catch
{
return "非法数据";
}
}

}
}


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