c# - 在之前而不是之后使用符号格式化货币

Answer 1

try in this way

public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
    var dValue = value as decimal?;
    Thread.CurrentThread.CurrentCulture = new CultureInfo("de");
    var nfi = (NumberFormatInfo)NumberFormatInfo.CurrentInfo.Clone();
    nfi.CurrencySymbol = "€";
    return string.Format(nfi,"{0:c}",dValue)
}

if it doesn't work try without this line

Thread.CurrentThread.CurrentCulture = new CultureInfo("de");

if it doesn't work again try changing CurrencyNegativePattern Property and CurrencyPositivePattern Property with the value of 2

nfi.NumberFormat.CurrencyPositivePattern = 2;
nfi.NumberFormat.CurrencyNegativePattern = 2;

2 means "€ + number"

Answer 2

Try this (quick code, not really a unit test method, just to see the output).

[Test]
public void CurrencySymbolShouldAppearBeforeValue()
{
    decimal price = 1370m;
    var formatInfo = CultureInfo.GetCultureInfo("de-DE")
                                .NumberFormat.Clone() as NumberFormatInfo;

    Assert.IsNotNull(formatInfo);

    formatInfo.CurrencyPositivePattern = 2;

    string formated = price.ToString("C3", formatInfo);
    Assert.IsNotNull(formated);
}

Outputs: € 1.370,000

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