| using System;
 using System.Collections.Generic;
 using System.Text;
 
 namespace Common
 {
 /// <summary>
 /// 转换人民币大小金额。
 /// </summary>
 public class Rmb
 {
 /// <summary>
 /// 转换人民币大小金额
 /// </summary>
 /// <param>金额</param>
 /// <returns>返回大写形式</returns>
 public static string CmycurD(decimal num)
 {
 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
 
 //循环取出每一位需要转换的值
 for (i = 0; i < j; i++)
 {
 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))
 {
 //当所取位数不为元、万、亿、万亿上的数字时
 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;
 }
 }
 }
 else
 {
 //该位是万亿,亿,万,元位等关键位
 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
 {
 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;
 }
 }
 }
 }
 }
 if (i == (j - 11) || i == (j - 3))
 {
 //如果该位是亿位或元位,则必须写上
 ch2 = str2.Substring(i, 1);
 }
 str5 = str5 + ch1 + ch2;
 
 if (i == j - 1 && str3 == "0")
 {
 //最后一位(分)为0时,加上“整”
 str5 = str5 + '整';
 }
 }
 if (num == 0)
 {
 str5 = "零元整";
 }
 return str5;
 }
 
 
 /// <summary>
 /// 转换人民币大小金额 (一个重载,将字符串先转换成数字在调用CmycurD)
 /// </summary>
 /// <param>用户输入的金额,字符串形式未转成decimal</param>
 /// <returns></returns>
 public static string CmycurD(string numstr)
 {
 try
 {
 decimal num = Convert.ToDecimal(numstr);
 return CmycurD(num);
 }
 catch
 {
 return "非数字形式!";
 }
 }
 }
 
 }
 
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