WPF Currency symbol

Question

I am using two different currencies in my software. Depending on company origin how can I show the currency before numerical data. Either £ or €

<TextBlock Text="{Binding FNetPriceAfterDisc,StringFormat=c}"  />

I would like to Bind "c" in code behind. If possible.

I tried this but doesn't work. Not sure what's wrong.

                                     <TextBlock  HorizontalAlignment="Center" >
                                    <TextBlock.Style>
                                        <Style TargetType="TextBlock">
                                            <Setter Property="Text" Value="{Binding FNetPriceAfterDisc,StringFormat=€0.000}" />
                                            <Style.Triggers>
                                                <DataTrigger Binding="{Binding Country}" Value="UK">
                                                    <Setter Property="Text" Value="{Binding FNetPriceAfterDisc,StringFormat=c}" />
                                                </DataTrigger>
                                            </Style.Triggers>
                                        </Style>
                                    </TextBlock.Style>
                                </TextBlock>

Answer 1

I'd give each item a language identifier tag as a string: en-GB, de, en-US, etc. I'd then write a MultiValueConverter and use that to format arbitrary text, with an arbitrary format, for an arbitrary culture. Since the format string to specify "currency" is also a parameter, this can be used for other localization tasks. It's important not simply to hardcode currency symbols: If Italy leaves the Eurozone, you shouldn't have to lose sleep over it (unless the EU pays your salary).

public class CultureFormatConverter : IMultiValueConverter
{
    public object Convert(object[] values, Type targetType, object parameter, 
        CultureInfo culture)
    {
        var value = values[0];
        var format = values[1] as String;
        var targetCulture = values[2] as string;

        return string.Format(new System.Globalization.CultureInfo(targetCulture), 
            format, value);
    }

    public object[] ConvertBack(object value, Type[] targetTypes, object 
        parameter, CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}

Create the converter in Resources somewhere where it'll be in scope:

<local:CultureFormatConverter x:Key="CultureFormatConverter" />

And then use it like so:

<TextBlock>
    <TextBlock.Text>
        <MultiBinding Converter="{StaticResource CultureFormatConverter}">
            <!-- Bind to FNetPriceAfterDisc property of the viewmodel -->
            <Binding Path="FNetPriceAfterDisc" />

            <!-- To pass a literal value with a binding, assign it to Source -->
            <Binding Source="{}{0:c}" />

            <!-- 
            Bind to Culture property of the viewmodel: Should be String that returns 
            "de" for Germany, "en-GB" for UK, null for Pennsylvania and Australia. 
            If you want a fixed value, make it Source="de" or whatever, not Path="de".
            But if you want to use a constant culture value, you might be happier 
            just using the ConverterCulture parameter to an ordinary binding. 
            -->
            <Binding Path="Culture" />
        </MultiBinding>
    </TextBlock.Text>
</TextBlock>