c# - C# 中的自定义货币格式

Question

我有一个函数:

string FormatCurrency(string currencyCode, decimal amount)

例子:

Input: "USD", 1230.56
Output: "USD 1,230.56"

Input: "USD", 1230.00
Output: "USD 1,230"

Input: "VND", 1200000
Output: "1.200.000 VND"

我想加入文化格式(使用代码，而不是符号)和自定义格式(“#,##.##”)。我该如何实现？谢谢

我的代码，我从网上得到的:

CultureInfo culture = (from c in CultureInfo.GetCultures(CultureTypes.SpecificCultures)
                       let r = new RegionInfo(c.LCID)
                       where r != null
                       && r.ISOCurrencySymbol.ToUpper() == currencyCode.ToUpper()
                       select c).FirstOrDefault();

if (culture == null)
{
    return amount.ToString("#,##.##");
}

return string.Format(culture, "{0:C2}", amount);

但输出是“$1,200.00”。我的预期结果是“1,200 美元”

Answer 1

有点hackish，但你可以这样做:

CultureInfo culture = (from c in CultureInfo.GetCultures(CultureTypes.SpecificCultures)
               let r = new RegionInfo(c.LCID)
               where r != null
               && r.ISOCurrencySymbol.ToUpper() == currencyCode.ToUpper()
               select c).FirstOrDefault();
if(culture == null)
{
  // fall back to current culture if none is found
  // you could throw an exception here if that's not supposed to happen
  culture = CultureInfo.CurrentCulture;            
}
culture = (CultureInfo)culture.Clone();
culture.NumberFormat.CurrencySymbol = currencyCode;

// Add spaces between the figure and the currency code
culture.NumberFormat.CurrencyPositivePattern = culture.NumberFormat.CurrencyPositivePattern == 0 ? 2 : 3;
var cnp = culture.NumberFormat.CurrencyNegativePattern;
switch(cnp)
{
  case 0: cnp = 14; break;
  case 1: cnp = 9; break;
  case 2: cnp = 12; break;
  case 3: cnp = 11; break;
  case 4: cnp = 15; break;
  case 5: cnp = 8; break;
  case 6: cnp = 13; break;
  case 7: cnp = 10; break;
}
culture.NumberFormat.CurrencyNegativePattern = cnp;

return amount.ToString("C" + ((amount % 1) == 0?"0":"2"), culture);     

在这里 fiddle :https://dotnetfiddle.net/30f7u3

对于:

FormatCurrency("USD", 1230.56M);
FormatCurrency("USD", 1230.00M);
FormatCurrency("VND", 1200000M);

我得到:

USD 1,230.56
USD 1,230
1.200.000 VND