更新时间:2022-04-18 19:11:38
使用IEditableCollectionView一个几乎完整的解决方案:
An almost complete solution using IEditableCollectionView:
ObservableCollection<ItemVM> _items;
public ObservableCollection<ItemVM> Items
{
get
{
if (_items == null)
{
_items = new ObservableCollection<ItemVM>();
var itemsView = (IEditableCollectionView)CollectionViewSource.GetDefaultView(_items);
itemsView.NewItemPlaceholderPosition = NewItemPlaceholderPosition.AtEnd;
}
return _items;
}
}
private DelegateCommand<object> _newCommand;
public DelegateCommand<object> NewCommand
{
get
{
if (_newCommand == null)
{
_newCommand = new DelegateCommand<object>(New_Execute);
}
return _newCommand;
}
}
private void New_Execute(object parameter)
{
Items.Add(new ItemVM());
}
<DataTemplate x:Key="newTabButtonContentTemplate">
<Grid/>
</DataTemplate>
<DataTemplate x:Key="newTabButtonHeaderTemplate">
<Button Content="+"
Command="{Binding ElementName=parentUserControl, Path=DataContext.NewCommand}"/>
</DataTemplate>
<DataTemplate x:Key="itemContentTemplate">
<Grid/>
</DataTemplate>
<DataTemplate x:Key="itemHeaderTemplate">
<TextBlock Text="TabItem_test"/>
</DataTemplate>
<vw:TemplateSelector x:Key="headerTemplateSelector"
NewButtonTemplate="{StaticResource newTabButtonHeaderTemplate}"
ItemTemplate="{StaticResource itemHeaderTemplate}"/>
<vw:TemplateSelector x:Key="contentTemplateSelector"
NewButtonTemplate="{StaticResource newTabButtonContentTemplate}"
ItemTemplate="{StaticResource itemContentTemplate}"/>
<TabControl ItemsSource="{Binding Items}"
ItemTemplateSelector="{StaticResource headerTemplateSelector}"
ContentTemplateSelector="{StaticResource contentTemplateSelector}"/>
public class TemplateSelector : DataTemplateSelector
{
public DataTemplate ItemTemplate { get; set; }
public DataTemplate NewButtonTemplate { get; set; }
public override DataTemplate SelectTemplate(object item, DependencyObject container)
{
if (item == CollectionView.NewItemPlaceholder)
{
return NewButtonTemplate;
}
else
{
return ItemTemplate;
}
}
}
Enter code here
这是几乎完全的,因为标签周期不会跳过'+'标签,将显示空内容(这不完全是伟大的,但我可以住在一起,直到一个更好的解决办法过来......)。
It's almost complete, because the tab cycle doesn't skip the '+' tab, and will show empty content (which is not exactly great, but I can live with it until a better solution come around...).