【微筆記】C# 金額轉成國字

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  • 2020-03-28

C# 金額轉成國字

利用10的次方來處理,支援顯示最高單位,金額不足則補"零",話不多說,直接秀程式碼。

/// <summary>
/// 金額轉國字
/// </summary>
/// <param name="amount"></param>
/// <param name="amountUnit"></param>
/// <returns></returns>
public static string AmountToString(long amount, AmountUnit amountUnit)
{
    int length = amount.ToString().Length - 1;
    if (amount < 0)
    {
        throw new ArgumentOutOfRangeException("amount", "數值必須為正整數");
    }
    else if (length > 13)
    {
        throw new ArgumentOutOfRangeException("amount", "數值不可超過13位數");
    }

    if (amountUnit == 0 || length > (int)amountUnit)
    {
        amountUnit = (AmountUnit)length;
    }
    string[] numberTexts = { "零", "壹", "貳", "參", "肆", "伍", "陸", "柒", "捌", "玖" };
    string[] typeMappings = { "", "拾", "佰", "仟", "萬", "拾", "佰", "仟", "億", "拾", "佰", "仟", "兆" };
    long pow10, tempNum;
    List<string> result = new List<string>();
    for (int i = (int)amountUnit; i >= 0; i--)
    {
        pow10 = Convert.ToInt64(Math.Pow(10, i));
        tempNum = amount / pow10;
        amount -= tempNum * pow10;
        result.Add(numberTexts[tempNum]);
        if (typeMappings[i] != "")
        {
            result.Add(typeMappings[i]);
        }
    }
    return string.Join(" ", result);
}

/// <summary>
/// 顯示最高單位,不足補零
/// </summary>
public enum AmountUnit
{
    /// <summary>
    /// 開頭不補零
    /// </summary>
    NoPadding = 0,
    /// <summary>
    /// 拾
    /// </summary>
    Ten,
    /// <summary>
    /// 佰
    /// </summary>
    Hundred,
    /// <summary>
    /// 仟
    /// </summary>
    Thousand,
    /// <summary>
    /// 萬
    /// </summary>
    TenThousand,
    /// <summary>
    /// 拾萬
    /// </summary>
    HundredThousand,
    /// <summary>
    /// 佰萬
    /// </summary>
    Million,
    /// <summary>
    /// 佰萬
    /// </summary>
    TenMillion,
    /// <summary>
    /// 億
    /// </summary>
    HundredMillion,
    /// <summary>
    /// 拾億
    /// </summary>
    Billion,
    /// <summary>
    /// 佰億
    /// </summary>
    TenBillion,
    /// <summary>
    /// 仟億
    /// </summary>
    HundredBillion,
    /// <summary>
    /// 兆
    /// </summary>
    Trillion
}

 

結果

 

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Based on a work at https://dotblogs.com.tw/chentingw.

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