.NET貨幣字符串抑制前導零，如果值<1

Question

我有一個問題。如果小於1，則無法找到不帶前導零的情況下將小數轉換爲貨幣字符串的格式。

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說明符來豐富這種效果，只是調用ToString？

Answer 1

試試這個：

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

來源：http://www.csharp-examples.net/string-format-double/

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

如果你想利用文化考慮您需要使用NumberFormatInfo提供的信息。以下是將小數格式設置爲貨幣但不包含前導零的擴展方法。如果您不想使用擴展方法，則可以輕鬆地將擴展方法更改爲常規方法。

代碼中有一個「快捷方式」。它無法處理多個組大小。我不認爲這可以使用自定義數字格式完成，唯一可行的解​​決方案將使用N進行格式化，並刪除任何領先的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(); 
    } 
    } 

}