人民币大小写转化

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Text;
using System.Security.Cryptography;

namespace VankeWeb.BaseClass
{
public class ConvertMoneyType
{
#region 小写金额转换为大写金额
/// <summary>
/// 人民币大写金额
/// </summary>
/// <param name="value">人民币数字金额值</param>
/// <param name="isLowercase">是否返回人民币小写金额</param>
/// <returns>返回人民币大写/小写金额</returns>
public string RMBAmount(double value, bool isLowercase)
{
string capResult = "";
string capValue = String.Format("{0:f4}", value);
bool addMinus = (capValue.Substring(0, 1) == "-");
int beginPos = addMinus ? 1 : 0;
int dotPos = addMinus ? capValue.IndexOf(".") - 1 : capValue.IndexOf(".");
bool addInt = (dotPos == 0);
//获取整数部分
string capInt = capValue.Substring(beginPos, dotPos);
//获取小数部分
string capDec = capValue.Substring(dotPos + 1);

if (dotPos > 0)
{

capResult = ConvertIntToUppercaseAmount(capInt) + ConvertDecToUppercaseAmount(capDec.TrimStart('.'), Convert.ToDouble(capInt) != 0 ? true : false);
}
else
{
capResult = ConvertIntToUppercaseAmount(capDec);
}
if (addMinus) capResult = "负" + capResult;
if (addInt) capResult += "整";
return isLowercase ? RMBLowercaseAmount(capResult) : capResult;
}

private string ConvertZero(string str)
{
string z = str.Substring(1);//截取小数点取得小数
if (Convert.ToInt32(z) == 0)
{
return "0";
}
else
{
return z;
}
}

/// <summary>
/// 将人民币大写转换成小写
/// </summary>
/// <param name="capValue">大写金额值</param>
/// <returns>返回人民币小写金额</returns>
private string RMBLowercaseAmount(string capValue)
{
string capResult = "";
string currCap = "";
for (int i = 0; i < capValue.Length; i++)
{
currCap = capValue.Substring(i, 1);
switch (currCap)
{
case "零": capResult += "〇"; break;
case "壹": capResult += "一"; break;
case "贰": capResult += "二"; break;
case "叁": capResult += "三"; break;
case "肆": capResult += "四"; break;
case "伍": capResult += "五"; break;
case "陆": capResult += "六"; break;
case "柒": capResult += "七"; break;
case "捌": capResult += "八"; break;
case "玖": capResult += "九"; break;
case "拾": capResult += "十"; break;
case "佰": capResult += "百"; break;
case "仟": capResult += "千"; break;
case "万": capResult += "万"; break;
default: capResult += currCap; break;
}
}
return capResult;
}

/// <summary>
/// 转换小数为大写金额
/// </summary>
/// <param name="capValue">小数值</param>
/// <param name="addZero">是否增加零位</param>
/// <returns>返回大写金额</returns>
private string ConvertDecToUppercaseAmount(string capValue, bool addZero)
{

string DXSZ = "零壹贰叁肆伍陆柒捌玖";
string DXDW = "毫厘分角元拾佰仟万拾佰仟亿拾佰仟万兆拾佰仟万亿";

string currCap = "";
string capResult = "";
int prevChar = addZero ? -1 : 0;
int currChar = 0;
int posIndex = 3;
if (Convert.ToInt16(capValue) == 0) return "";
for (int i = 0; i < capValue.Length; i++)
{
currChar = Convert.ToInt16(capValue.Substring(i, 1));
if (currChar != 0)
{
currCap = DXSZ.Substring(currChar, 1) + DXDW.Substring(posIndex, 1);
}
else
{
if (Convert.ToInt16(capValue.Substring(i)) == 0)
{
break;
}
else if (prevChar != 0)
{
currCap = "零";
}
}
capResult += currCap;
prevChar = currChar;
posIndex -= 1;
currCap = "";
}
return capResult;
}

/// <summary>
/// 转换整数为大写金额
/// </summary>
/// <param name="capValue">整数值</param>
/// <returns>返回大写金额</returns>
private string ConvertIntToUppercaseAmount(string capValue)
{

string DXSZ = "零壹贰叁肆伍陆柒捌玖";
string DXDW = "毫厘分角元拾佰仟万拾佰仟亿拾佰仟万兆拾佰仟万亿";

string currCap = "";
string capResult = "";
int prevChar = -1;
int currChar = 0;
int posIndex = 4;
if (Convert.ToDouble(capValue) == 0) return "";
for (int i = capValue.Length - 1; i >= 0; i--)
{
currChar = Convert.ToInt16(capValue.Substring(i, 1));
if (posIndex > 22)
{
break;
}
else if (currChar != 0)
{
currCap = DXSZ.Substring(currChar, 1) + DXDW.Substring(posIndex, 1);
}
else
{
switch (posIndex)
{
case 4: currCap = "元"; break;
case 8: currCap = "万"; break;
case 12: currCap = "亿"; break;
case 17: currCap = "兆"; break;
default: break;
}
if (prevChar != 0)
{
if (currCap != "")
{
if (currCap != "元") currCap += "零";
}
else
{
currCap = "零";
}
}
}
capResult = currCap + capResult;
prevChar = currChar;
posIndex += 1;
currCap = "";
}
return capResult;
}
#endregion
}
}