我有一个名为ContactList的类,它有一个名为AggLabels的属性,它是一个Observable Collection。填充ContactList时,AggLabels集合将包含一些重复的AggregatedLabel。有没有办法使用ListCollectionView按“名称”对这些AggregatedLabels进行分组,以便在将集合绑定到WPF中的listBox时不显示重复项?通过ContactListName在我的代码段组中的代码有一种方法可以修改它以实现我的目标吗?感谢
ContactList
public class ContactList
{
public int ContactListID { get; set; }
public string ContactListName { get; set; }
public ObservableCollection<AggregatedLabel> AggLabels { get; set; }
}
AggregatedLabel
public class AggregatedLabel
{
public int ID { get; set; }
public string Name { get; set; }
}
代码段
private void Window_Loaded(object sender, RoutedEventArgs e)
{
//TODO: Add event handler implementation here.
ListCollectionView lcv = new ListCollectionView(myContactLists);
lcv.GroupDescriptions.Add(new PropertyGroupDescription("ContactListName"));
contactsListBox.ItemsSource = lcv.Groups;
}
答案 0 :(得分:0)
由于您尚未提供有关AggLabels使用情况的信息,我希望此解决方案有所帮助:
<ComboBox Name="contactsListBox" ItemsSource="{Binding MyList}">
<ComboBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<TextBlock Text="{Binding ContactListName}"/>
<ComboBox ItemsSource="{Binding AggLabels, Converter={StaticResource Conv}}"/>
</StackPanel>
</DataTemplate>
</ComboBox.ItemTemplate>
</ComboBox>
public class AggLabelsDistictConverter : IValueConverter
{
class AggregatedLabelComparer : IEqualityComparer<AggregatedLabel>
{
#region IEqualityComparer<AggregatedLabel> Members
public bool Equals(AggregatedLabel x, AggregatedLabel y)
{
return x.Name == y.Name;
}
public int GetHashCode(AggregatedLabel obj)
{
return obj.Name.GetHashCode();
}
#endregion
}
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
if (value is IEnumerable<AggregatedLabel>)
{
var list = (IEnumerable<AggregatedLabel>)value;
return list.Distinct(new AggregatedLabelComparer());
}}}
正如您所看到的,我以通常的方式绑定ContactListEnumerable,并且每个ContactList容器中的AggLabels列表 - 通过转换器删除重复项。