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                          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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