C#实现将浮点数表示的货币数量以汉字大写形式输出的方法

/// <summary>
/// 将字符型变量转化为大写汉语数字
/// </summary>
/// <param name="ch">字符 '0'~'9'</param>
/// <returns></returns>
private static string NumToChr(char ch)
{
 switch (ch)
 {
  case '0': return "零";
  case '1': return "壹";
  case '2': return "贰";
  case '3': return "叁";
  case '4': return "肆";
  case '5': return "伍";
  case '6': return "陆";
  case '7': return "柒";
  case '8': return "捌";
  case '9': return "玖";
  default: return "";
 }
}
/// <summary>
/// 把数字转换为大写数字
/// </summary>
/// <param name="n"></param>
/// <returns></returns>
private static string RMBToChr(double n)
{
 //保留小数点后两位数字
 string sMoney = n.ToString("#0.00");
 StringBuilder sbResult = new StringBuilder();
 for (int i = 0; i < sMoney.Length; i++)
 {
  //遇到小数点，则后面 A.XX 写为 A圆X角X分
  if (sMoney[i] == '.')
  {
   sbResult.Append("圆");
   //角和分属性都为0时直接写整字
   if (sMoney[i + 1] == '0' && sMoney[i + 2] == '0')
   {
    sbResult.Append("整");
    break;
   }
   else
   {
    //角和分属性只有在对应位不为0时才写
    if (sMoney[i + 1] != '0')
    {
     sbResult.Append(NumToChr(sMoney[i + 1]) + "角");
    }
    if (sMoney[i + 2] != '0')
    {
     sbResult.Append(NumToChr(sMoney[i + 2]) + "分");
    }
    else //分为0时也要写整字
    {
     sbResult.Append("整");
    }
    break;
   }
  }
  //非零数字直接输出对应数字和位
  if (sMoney[i] != '0')
  {
   sbResult.Append(NumToChr(sMoney[i]));
   //补上相应位的权
   int temp = sMoney.Length - 4 - i;
   switch (temp)
   {
    case 0: break;
    case 1: sbResult.Append("拾"); break;
    case 2: sbResult.Append("佰"); break;
    case 3: sbResult.Append("仟"); break;
    case 4: sbResult.Append("万"); break;
    case 5: sbResult.Append("拾"); break;
    case 6: sbResult.Append("佰"); break;
    case 7: sbResult.Append("仟"); break;
    case 8: sbResult.Append("亿"); break;
    case 9: sbResult.Append("拾"); break;
    case 10: sbResult.Append("百"); break;
    case 11: sbResult.Append("仟"); break;
    case 12: sbResult.Append("万"); break;
    default: throw new Exception("这个数太大了！");
   }
  }
  else //如果该位数字为0，则万位和亿位要写权，多个连续0就写一个零
  {
   int temp = sMoney.Length - 4 - i;
   if (temp == 4) { sbResult.Append("万"); continue; }
   else if (temp == 8) { sbResult.Append("亿"); continue; }
   else if (sMoney[i + 1] == '0') { continue; }
   else sbResult.Append("零");
  }
 }
 return sbResult.ToString();
}

static void Main(string[] args)
{
 //数字转化为人民币大写
 Console.WriteLine(RMBToChr(12345));
 Console.WriteLine(RMBToChr(60001.215));
 Console.WriteLine(RMBToChr(70010001.8));
 Console.WriteLine(RMBToChr(10110901.01));
 Console.WriteLine(RMBToChr(0.01));
 Console.ReadLine();
}