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C# 將數字轉換為英文金額

發表於 分類於 ，

本文大部分轉自炎龍牙大大，我有根據我所需求的格式稍微地變更了一些。主要是之後改報表會需要用到，所以記錄在自己的文章中。

原文: https://dotblogs.com.tw/dragoncancer/2020/03/03/170546

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class NumberToEnglish
{
    public string Number2English(string nu)
    {
      string dollars = "";
      string cents = "";
      string tp = "";
      string[] temp;
      string[] tx = { "", "thousand ", "million ", "billion ", "trillion " };

      if (decimal.Parse(nu) == 0) return "Zero Dollars";

      else if (decimal.Parse(nu) <= 0) return "Error!! ";

      else if(nu.Split('.').Length > 1)
      { //處理小數點(通常是兩位)
        temp = nu.Split('.');
        string strx = temp[1].ToString();

        string cent = GetEnglish(strx);
        if (!cent.Equals("")) cents = "point" + cent;
      }

      //處理整數部分
      //先將資料格式化，只取出整數
      decimal x = Math.Truncate(decimal.Parse(nu));
      //格式化整數部分
      temp = x.ToString("#,0").Split(',');
      //利用整數,號檢查千、萬、百萬....
      int j = temp.Length -1 ;

      for (int i = 0; i < temp.Length; i++)
      {
        tp =  tp + GetEnglish(temp[i]);
        if (tp != "")
        {
          tp = tp + tx[j] + "" ;
        }
        else
        {
          tp = tp + "";
        }

        j = j - 1;
      }
      if (x == 0 && cents != "") // 如果整數部位= 0 ，且有小數
      {
        dollars = "Zero Dollars And" + cents + " only";
      }
      else
      {
        if (cents == "")
        {
          dollars = tp + "dollars only";
        }
        else
        {
          dollars = tp + cents + "only";
        }
      }
      return dollars;
    }

    private string GetEnglish(string nu)
    {
      string x = "";
      string str1;
      string str2;
      string[] tr = { "", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "ten", "eleven", "twelve", "thirteen", "fourteen", "fifteen", "sixteen", "seventeen", "eighteen", "nineteen" };
      string[] ty = { "", "", "twenty", "thirty", "forty", "fifty", "sixty", "seventy", "eighty", "ninety" };

      //處理百位數
      str1 = tr[int.Parse(nu) / 100] + " hundred"; //EX  當315除以100 用於int 會取出3 ..對應到字串陣列，就是 Three
      if (str1.Equals(" hundred")) str1 = ""; //如果結果是空值，表示沒有百分位
      //處理十位數
      int temp = int.Parse(nu) % 100;   //  當315 除100 會剩餘 15

      if (temp < 20)
      {
        str2 = tr[temp]; //取字串陣列
      }
      else
      {
        str2 = ty[(temp / 10)].ToString();  //十位數  10/20/30的數量確認

        if (str2.Equals(""))
        {
          str2 = tr[(temp % 10)] ;
        }
        else if((temp % 10) > 0)
        {
          str2 = str2 + "-" + tr[(temp % 10)] ;  //十位數組成
        }

      }
      if (str1 == "" && str2 == "")
      {
        x = "";
      }
      else
      {
        x = str1 + " " + str2 + " " ;
      }

      return x;
    }
}