C#　数字（阿拉伯数字）金额转汉字金额　人民币操作类：转换人民币大小金额。

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/// <summary>
      /// 转换为人民币大写金额形式
      /// </summary>
      /// <param name="Money">金额</param>
      /// <returns>返回大写形式</returns>
      public static string NumberToChineseMoney(this object number)
      {
          decimal numberMoney = 0;
          try
          {
              numberMoney = Convert.ToDecimal(number);
          }
          catch
          {
              return "非数字形式！";
          }
          //0-9数字所对应的汉字
          const string numericChinese = "零壹贰叁肆伍陆柒捌玖";
          //数字单位所对应的汉字
          string unitChinese = "万仟佰拾亿仟佰拾万仟佰拾元角分";
          //将Money取绝对值并四舍五入取2位小数
          numberMoney = Math.Round(Math.Abs(numberMoney), 2);
          //数字的字符串形式
          string strNumeric = ((long)(numberMoney * 100)).ToString();
          //人民币大写金额形式
          string strCmycurD = "";
          //最高单位
          int maxUnit = strNumeric.Length;    
          if (maxUnit > 15) { return "溢出"; }
          //取出对应位数的unitChinese的值。如：200.55,maxUnit为5所以unitChinese=佰拾元角分
          unitChinese = unitChinese.Substring(15 - maxUnit);
          //数字单位的汉字转换
          string unitConvert = "";
          //用来计算连续的零值是几个
          int nzero = 0; 
          //循环取出每一位需要转换的值
          for (int i = 0; i < maxUnit; i++)
          {
              //数字的汉字转换
              string numericConvert;
              //取出需转换的某一位的值
              string strConvertValue = strNumeric.Substring(i, 1);
              //转换为数字
              int convertValue = Convert.ToInt32(strConvertValue);    
              if (i != (maxUnit - 3) && i != (maxUnit - 7) && i != (maxUnit - 11) && i != (maxUnit - 15))
              {
                  //当所取位数不为元、万、亿、万亿上的数字时
                  if (strConvertValue == "0")
                  {
                      numericConvert = "";
                      unitConvert = "";
                      nzero = nzero + 1;
                  }
                  else
                  {
                      if (strConvertValue != "0" && nzero != 0)
                      {
                          numericConvert = "零" + numericChinese.Substring(convertValue * 1, 1);
                          unitConvert = unitChinese.Substring(i, 1);
                          nzero = 0;
                      }
                      else
                      {
                          numericConvert = numericChinese.Substring(convertValue * 1, 1);
                          unitConvert = unitChinese.Substring(i, 1);
                          nzero = 0;
                      }
                  }
              }
              else
              {
                  //该位是万亿，亿，万，元位等关键位
                  if (strConvertValue != "0" && nzero != 0)
                  {
                      numericConvert = "零" + numericChinese.Substring(convertValue * 1, 1);
                      unitConvert = unitChinese.Substring(i, 1);
                      nzero = 0;
                  }
                  else
                  {
                      if (strConvertValue != "0" && nzero == 0)
                      {
                          numericConvert = numericChinese.Substring(convertValue * 1, 1);
                          unitConvert = unitChinese.Substring(i, 1);
                          nzero = 0;
                      }
                      else
                      {
                          if (strConvertValue == "0" && nzero >= 3)
                          {
                              numericConvert = "";
                              unitConvert = "";
                              nzero = nzero + 1;
                          }
                          else
                          {
                              if (maxUnit >= 11)
                              {
                                  numericConvert = "";
                                  nzero = nzero + 1;
                              }
                              else
                              {
                                  numericConvert = "";
                                  unitConvert = unitChinese.Substring(i, 1);
                                  nzero = nzero + 1;
                              }
                          }
                      }
                  }
              }
              if (i == (maxUnit - 11) || i == (maxUnit - 3))
              {
                  //如果该位是亿位或元位，则必须写上
                  unitConvert = unitChinese.Substring(i, 1);
              }
              strCmycurD = strCmycurD + numericConvert + unitConvert;
 
              if (i == maxUnit - 1 && strConvertValue == "0")
              {
                  //最后一位（分）为0时，加上“整”
                  strCmycurD = strCmycurD + '整';
              }
          }
          if (numberMoney == 0)
          {
              strCmycurD = "零元整";
          }
          return strCmycurD;
      }