我想使用的IValueConverter到集合轉換成代理對象的數據綁定。WPF的IValueConverter沒有更新的觀點
轉換器似乎很好地工作,但是當一個新的對象被添加或從集合中刪除的問題。同樣是在視圖中不刷新..
模型對象:
public class A {
public ObservableCollection<string> Members { get; }
}
轉換
public class MemberConverter : IValueConverter {
public object Convert(object value, Type targetType, object parameter, CultureInfo culture) {
var collection = new CompositeCollection();
var a = value as A;
a.Members.ToList().ForEach(member => {
collection.Add(new ProxyClass{ A= a, Member= member });
});
return collection;
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) {
throw new System.NotImplementedException();
}
}
代理類
public class ProxyClass {
public A A { get; set; }
public string Member{ get; set; }
}
XAML:
<DataTemplate DataType="{x:Type my:ProxyClass}">
<TextBlock Text="{Binding Path=Member}"/>
</DataTemplate>
<HierarchicalDataTemplate DataType="{x:Type A}" ItemsSource="{Binding Converter={StaticResource MemberConverter}}">
<TextBlock Text ="{Binding}"/>
</HierarchicalDataTemplate>
改爲代碼來執行INotifyPropertyChanged的代理對象募集屬性更改通知「成員」,並改變了XAML作爲好。仍然沒有運氣.. – Arihant