WPF XML：LANG /语言绑定 [英] WPF xml:lang/Language binding

问题描述

如何能绑定列表框的或texblock的语言属性（或者xml：lang属性）。

how can i bind Listbox's or texblock's Language attribute (or xml:lang attribute).

我要显示在特定的语言环境的月份名称

i want to show month names in the specific language setting

例如：

<TextBlock x:Name="Date" xml:lang="{Binding Lang}">
        <TextBlock.Text>
            <MultiBinding StringFormat=" {0:dd.MMM.yyyy}-{1:dd.MMM.yyyy}">
                <Binding Path="Date1"/>
                <Binding Path="Date2"/>
            </MultiBinding>
</TextBlock.Text>

结果应根据郎财产是：

result should be according to Lang property:

01.Apr.2011 - 01.Apr.2011的en-US

01.Apr.2011 - 01.Apr.2011 en-US

或01.Nis.2011 - 02.Nis.2011 TR-TR

or 01.Nis.2011 - 02.Nis.2011 tr-TR

或....

它给XamlParseException：语言属性不能转换为System.Windows.Markup.XmlLanguage类型

it gives XamlParseException : Language attribute cannot convert to System.Windows.Markup.XmlLanguage type (that is not exact Error Text. )

任何想法？

推荐答案

在应用程序的启动事件，添加此指令：

In the Startup event of the application, add this instruction:

FrameworkElement.LanguageProperty.OverrideMetadata(
    typeof(FrameworkElement),
    new FrameworkPropertyMetadata(
        XmlLanguage.GetLanguage(CultureInfo.CurrentCulture.IetfLanguageTag)));

这将覆盖语言属性的默认值与当前的文化，为整个应用程序。

It will override the default value of the Language property to the current culture, for the whole application.

编辑：好吧，我误解你的问题...

ok, I had misunderstood your question...

如果你想在语言属性绑定到包含字符串 IetfLanguageTag ，你需要一个转换器：

If you want to bind the Language property to a string containing the IetfLanguageTag, you need a converter:

[ValueConversion(typeof(string), typeof(XmlLanguage))]
public class IetfTagToXmlLanguageConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        string tag = value as string;
        if (tag == null)
            return Binding.DoNothing;
        return XmlLanguage.GetLanguage(tag);
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        XmlLanguage lang = value as XmlLanguage;
        if (lang == null)
            return Binding.DoNothing;
        return lang.IetfLanguageTag;
    }
}

声明转换器中的XAML资源：

Declare the converter in the XAML resources:

<local:IetfTagToXmlLanguageConverter x:Key="languageConverter" />

和在绑定使用转换器：

<TextBlock Language="{Binding Lang, Converter={StaticResource languageConverter}}">

这篇关于WPF XML：LANG /语言绑定的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！