如何在Silverlight中即时切换UI文化数据绑定

Question

我有一个TextBlock控件,它是绑定到DateTime属性的数据.

文本显示如下:

2010年10月21日,星期四

我需要动态切换UI Culture,使用以下内容:

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

我试过这个强制绑定到recalc:

var bindingExpression = textBlock.GetBindingExpression(TextBlock.TextProperty);
bindingExpression.UpdateSource();

但我仍然看到周四而不是Donnerstag ......

我该怎么办？有任何想法吗？

Answer 1

我找到了一个更好的方法,它只需要更新根视觉.

public sealed class Localizer : INotifyPropertyChanged
{
  public Localizer() 
  {
    Culture = Thread.CurrentThread.CurrentCulture; 
  }

  XmlLanguage _language;
  public XmlLanguage Language 
  { 
    get { return _language; } 
    private set { _language = value; RaiseOnPropertyChanged("Language"); } 
  }

  CultureInfo _culture;
  public CultureInfo Culture 
  { 
    get { return _culture; }
    set 
    { 
      Contract.Requires(value != null);  

      if (_culture == value) return; 
      _culture = value; 

      Thread.CurrentThread.CurrentCulture =
      Thread.CurrentThread.CurrentUICulture = value;
      Language = XmlLanguage.GetLanguage(value.Name);

      RaiseOnPropertyChanged("Culture");
    }
  }

  protected void RaiseOnPropertyChanged(string propName) 
  {
    var e = OnPropertyChanged;
    if (e != null) e(this, new PropertyChangedEventArgs(propName));
  }

  public event PropertyChangedEventHandler OnPropertyChanged;
}

现在将此实例添加到应用程序资源:

<nt:Localizer x:Key="Localizer"/>

现在将它绑定到您的根视觉(fe Frame,UserControl或Page),如下所示:

<UserControl ... Language="{Binding Language, Source={StaticResource Localizer}}">