.NET 货币转字符串在值 < 时抑制前导零1

Question

我有一个问题。如果小于 1，则无法找到将小数转换为不带前导零的货币字符串的格式。

例如，

decimal d = 0.14M;
d.ToString("C"); // Translates to   $0.14  But I need to get  $ .14

是否有一些特殊的精度说明符可以仅调用 ToString 来丰富这种效果？

Answer 1

试试这个：

string result = String.Format("{0:#.0}", d);

来源：http://www.csharp-examples.net/string-format -双/

Answer 2

decimal d = 0.14M;
var cs = CultureInfo.CurrentCulture.NumberFormat.CurrencySymbol;
string result = String.Format(String.Concat("{0:", cs, " #.00}"), d);
// result == "$ .14" if CurrentCulture is "en-US"

Answer 3

如果您想考虑文化，则需要使用 提供的信息NumberFormatInfo。下面是将小数格式化为货币但不带前导零的扩展方法。如果您不想使用扩展方法，可以轻松地将扩展方法更改为普通方法。

代码中有一个“快捷方式”。它无法处理多个组大小。我认为使用自定义数字格式无法做到这一点，唯一可行的解​​决方案是使用 N 进行格式化并删除任何前导 0。

static class DecimalExtensions {

  public static String ToCurrencyFormat(this Decimal value) {
    return ToCurrencyFormat(value, CultureInfo.CurrentCulture);
  }

  public static String ToCurrencyFormat(this Decimal value, CultureInfo cultureInfo) {
    return ToCurrencyFormat(value, cultureInfo.NumberFormat);
  }

  public static String ToCurrencyFormat(this Decimal value,
                                        NumberFormatInfo numberFormat) {
    // Assume the CurrencyGroupSizes contains a single element.
    var format =
      "#,"
      + new String('#', numberFormat.CurrencyGroupSizes[0])
      + "."
      + new String('0', numberFormat.CurrencyDecimalDigits);
    var formattedValue = Math.Abs(value).ToString(format, numberFormat);
    if (value >= Decimal.Zero)
      return FormatPositiveCurrency(
        numberFormat.CurrencyPositivePattern,
        numberFormat.CurrencySymbol,
        formattedValue
      );
    else
      return FormatNegativeCurrency(
        numberFormat.CurrencyNegativePattern,
        numberFormat.CurrencySymbol,
        formattedValue
      );
  }

  static String FormatPositiveCurrency(Int32 pattern, String symbol, String value) {
    switch (pattern) {
      case 0:
        return symbol + value;
      case 1:
        return value + symbol;
      case 2:
        return symbol + " " + value;
      case 3:
        return value + " " + symbol;
      default:
        throw new ArgumentException();
    }
  }

  static String FormatNegativeCurrency(Int32 pattern, String symbol, String value) {
    switch (pattern) {
      case 0:
        return "(" + symbol + value + ")";
      case 1:
        return "-" + symbol + value;
      case 2:
        return symbol + "-" + value;
      case 3:
        return symbol + value + "-";
      case 4:
        return "(" + value + symbol + ")";
      case 5:
        return "-" + value + symbol;
      case 6:
        return value + "-" + symbol;
      case 7:
        return value + symbol + "-";
      case 8:
        return "-" + value + " " + symbol;
      case 9:
        return "-" + symbol + " " + value;
      case 10:
        return value + " " + symbol + "-";
      case 11:
        return symbol + " " + value + "-";
      case 12:
        return symbol + " -" + value;
      case 13:
        return value + "- " + symbol;
      case 14:
        return "(" + symbol + " " + value + ")";
      case 15:
        return "(" + value + " " + symbol + ")";
      default:
        throw new ArgumentException();
    }
  }

}