A轉換器類可以做的伎倆爲您實現所需的行爲
public class CurrencyConverter : MarkupExtension, IMultiValueConverter
{
public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
{
return GetCurrency(values);
}
public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
{
throw new NotImplementedException();
}
public override object ProvideValue(IServiceProvider serviceProvider)
{
return this;
}
private string GetCurrency(object[] values)
{
switch (values[1].ToString())
{
case "USD":
return string.Format(new System.Globalization.CultureInfo("en-US"), "{0:C}", values[0]);
case "EUR":
return string.Format(new System.Globalization.CultureInfo("en-GB"), "{0:C}", values[0]);
default:
return string.Format(new System.Globalization.CultureInfo("en-US"), "{0:C}", values[0]);
}
}
}
只需使用XAML中的轉換器與TextBlock
綁定。
<TextBlock DataContext="{Binding SelectedItem, ElementName=listBox}">
<TextBlock.Text>
<MultiBinding Converter="{local:CurrencyConverter}">
<Binding Path="Value"/>
<Binding Path="Currency"/>
</MultiBinding>
</TextBlock.Text>
</TextBlock>
爲什麼不把字符串作爲返回SelectedItem格式的屬性,並且只是綁定到它?我總是發現在你的觀點中把這樣的邏輯有問題並且很難測試。 – JMK