C#中把货币、日期转换成中文大写

/// <summary>
/// 日期转换为中文大写
/// </summary>
public class UpperConvert
{
public UpperConvert()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
//把数字转换为大写
public string numtoUpper(int num)
{
String str=num.ToString();
string rstr = "";
int n;
for (int i = 0; i < str.Length; i++)
{
n =Convert.ToInt16(str[i].ToString());//char转数字,转换为字符串，再转数字
switch (n)
{
case 0:rstr=rstr+"〇";break;
case 1:rstr=rstr+"一";break;
case 2:rstr=rstr+"二";break;
case 3:rstr=rstr+"三";break;
case 4:rstr=rstr+"四";break;
case 5:rstr=rstr+"五";break;
case 6:rstr=rstr+"六";break;
case 7:rstr=rstr+"七";break;
case 8:rstr=rstr+"八";break;
default:rstr=rstr+"九";break;

}

}
return rstr;
}
//月转化为大写
public string monthtoUpper(int month)
{
if (month < 10)
{
return numtoUpper(month);
}
else
if (month == 10) { return "十"; }

else
{
return "十" + numtoUpper(month - 10);
}
}
//日转化为大写
public string daytoUpper(int day)
{
if (day < 20)
{
return monthtoUpper(day);
}
else
{
String str = day.ToString();
if (str[1] == '0')
{
return numtoUpper(Convert.ToInt16(str[0].ToString()))+"十" ;

}

else
{
return numtoUpper(Convert.ToInt16(str[0].ToString())) + "十"
+ numtoUpper(Convert.ToInt16(str[1].ToString()));
}
}
}
//日期转换为大写
public string  dateToUpper(System.DateTime date)
{
int year = date.Year;
int month = date.Month;
int day = date.Day;
return numtoUpper(year) + "年" + monthtoUpper(month) + "月" + daytoUpper(day) + "日";

}
}

/// <summary>
/// MoneyConvert 的摘要说明
/// </summary>
public class MoneyConvert
{
public MoneyConvert()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
public string GetUpper(string numstr)
{
try
{
decimal num = Convert.ToDecimal(numstr);
return GetUpper(num);
}
catch
{
return "非数字形式！";
}
}
public string GetUpper(int numint)
{
try
{
decimal num = Convert.ToDecimal(numint);
return GetUpper(num);
}
catch
{
return "非数字形式！";
}
}
/**/
/// <summary>
/// 转换人民币大小金额
/// </summary>
/// <param name="num">金额</param>
/// <returns>返回大写形式</returns>
public string GetUpper(decimal num)
{
string strUpperMum = "零壹贰叁肆伍陆柒捌玖";            //0-9所对应的汉字
string strNumUnit = "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 strOfNum = "";    //从原num值中取出的值
string strNum = "";    //数字的字符串形式
string strReturnUpper = "";  //人民币大写金额形式
int i;    //循环变量
int sumLength;    //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
strNum = ((long)(num * 100)).ToString();        //将num乘100并转换成字符串形式
sumLength = strNum.Length;      //找出最高位
if (sumLength > 15) { return "溢出"; }
strNumUnit = strNumUnit.Substring(15 - sumLength);   //取出对应位数的strNumUnit的值。如：200.55,sumLength为5所以strNumUnit=佰拾元角分

//循环取出每一位需要转换的值
for (i = 0; i < sumLength; i++)
{
strOfNum = strNum.Substring(i, 1);          //取出需转换的某一位的值
temp = Convert.ToInt32(strOfNum);      //转换为数字
if (i != (sumLength - 3) && i != (sumLength - 7) && i != (sumLength - 11) && i != (sumLength - 15))
{
//当所取位数不为元、万、亿、万亿上的数字时
if (strOfNum == "0")
{
ch1 = "";
ch2 = "";
nzero = nzero + 1;
}
else
{
if (strOfNum != "0" && nzero != 0)
{
ch1 = "零" + strUpperMum.Substring(temp * 1, 1);
ch2 = strNumUnit.Substring(i, 1);
nzero = 0;
}
else
{
ch1 = strUpperMum.Substring(temp * 1, 1);
ch2 = strNumUnit.Substring(i, 1);
nzero = 0;
}
}
}
else
{
//该位是万亿，亿，万，元位等关键位
if (strOfNum != "0" && nzero != 0)
{
ch1 = "零" + strUpperMum.Substring(temp * 1, 1);
ch2 = strNumUnit.Substring(i, 1);
nzero = 0;
}
else
{
if (strOfNum != "0" && nzero == 0)
{
ch1 = strUpperMum.Substring(temp * 1, 1);
ch2 = strNumUnit.Substring(i, 1);
nzero = 0;
}
else
{
if (strOfNum == "0" && nzero >= 3)
{
ch1 = "";
ch2 = "";
nzero = nzero + 1;
}
else
{
if (sumLength >= 11)
{
ch1 = "";
nzero = nzero + 1;
}
else
{
ch1 = "";
ch2 = strNumUnit.Substring(i, 1);
nzero = nzero + 1;
}
}
}
}
}
4000

if (i == (sumLength - 11) || i == (sumLength - 3))
{
//如果该位是亿位或元位，则必须写上
ch2 = strNumUnit.Substring(i, 1);
}
strReturnUpper = strReturnUpper + ch1 + ch2;

if (i == sumLength - 1 && strOfNum == "0")
{
//最后一位（分）为0时，加上“整”
strReturnUpper = strReturnUpper + '整';
}
}
if (num == 0)
{
strReturnUpper = "零元整";
}
return strReturnUpper;
}
}