我有一个有效的 Prism 应用程序。我可以从 CheckBox 添加和关闭 TabControl 中的 TabItem。当 TabItem 关闭或添加时，我无法取消选中复选框。请有人帮帮我。
我正在使用棱镜区域适配器和区域行为，如下所示。
对接管理器区域适配器
using Syncfusion.Windows.Tools.Controls;
using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Linq;
using System.Net.NetworkInformation;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
namespace Common.Helpers.Regions
{
public class DockingManagerRegionAdapter : RegionAdapterBase<DockingManager>
{
/// <summary>
/// Used to determine what views were injected and ContentPanes were generated for
/// </summary>
private static readonly DependencyProperty IsGeneratedProperty = DependencyProperty.RegisterAttached("IsGenerated", typeof(bool), typeof(DockingManagerRegionAdapter), null);
/// <summary>
/// Used to track the region that a ContentPane belongs to so that we can access the region from within the ContentPane.Closed event handler
/// </summary>
private static readonly DependencyProperty RegionProperty = DependencyProperty.RegisterAttached("Region", typeof(IRegion), typeof(DockingManagerRegionAdapter), null);
public DockingManagerRegionAdapter(IRegionBehaviorFactory regionBehaviorFactory)
: base(regionBehaviorFactory)
{
}
protected override void Adapt(IRegion region, DockingManager regionTarget)
{
if (regionTarget.ItemsSource != null)
throw new InvalidOperationException("ItemsSource property is not empty.This control is being associated with a region, but the control is already bound to something else.If you did not explicitly set the control’s ItemSource property, this exception may be caused by a change in the value of the inherited RegionManager attached property.");
if (region == null) throw new ArgumentNullException(nameof(region));
if (regionTarget == null) throw new ArgumentNullException(nameof(regionTarget));
region.Views.CollectionChanged += (s, e) =>
{
if (e.Action == NotifyCollectionChangedAction.Add)
{
foreach (FrameworkElement view in e.NewItems)
{
AddViewToRegion(view, regionTarget);
}
}
else if (e.Action == NotifyCollectionChangedAction.Remove)
{
foreach (FrameworkElement view in e.OldItems)
{
RemoveViewFromRegion(view, regionTarget);
}
}
};
regionTarget.WindowClosing += delegate (object sender, WindowClosingEventArgs args)
{
var child = args.TargetItem as UserControl;
region.Remove(child);
};
regionTarget.CloseButtonClick += delegate (object sender, CloseButtonEventArgs args)
{
var child = args.TargetItem as UserControl;
region.Remove(child);
};
}
protected override IRegion CreateRegion()
{
return new SingleActiveRegion();
}
private static void AddViewToRegion(object view, DockingManager dockingManager)
{
if (view is ContentControl document)
{
if (!dockingManager.Children.Contains(document))
{
dockingManager.BeginInit();
dockingManager.Children.Add(document);
dockingManager.EndInit();
dockingManager.ActiveWindow = document;
}
}
}
private static void RemoveViewFromRegion(object view, DockingManager dockingManager)
{
if (view is ContentControl document)
{
dockingManager.BeginInit();
dockingManager.Children.Remove(document);
dockingManager.EndInit();
}
}
protected override void AttachBehaviors(IRegion region, DockingManager regionTarget)
{
base.AttachBehaviors(region, regionTarget);
if (!region.Behaviors.ContainsKey(DocumentRegionActiveAwareBehavior.BehaviorKey))
region.Behaviors.Add(DocumentRegionActiveAwareBehavior.BehaviorKey, new DocumentRegionActiveAwareBehavior { HostControl = regionTarget });
}
}
}
DocumentRegionActiveAwareBehavior
using Prism.Regions.Behaviors;
using Syncfusion.Windows.Tools.Controls;
using System.Collections.Specialized;
using System.Windows;
using System.Windows.Controls;
namespace Common.Helpers.Regions
{
public class DocumentRegionActiveAwareBehavior : RegionBehavior, IHostAwareRegionBehavior
{
public const string BehaviorKey = "DocumentRegionActiveAwareBehavior";
DependencyObject _hostControl;
public DependencyObject HostControl
{
get { return _hostControl; }
set { _hostControl = value as DockingManager; }
}
protected override void OnAttach()
{
((HostControl as DockingManager).DocContainer as DocumentContainer).AddTabDocumentAtLast = true;
(HostControl as DockingManager).ActiveWindowChanged += DocumentRegionActiveAwareBehavior_ActiveWindowChanged;
Region.ActiveViews.CollectionChanged += ActiveViews_CollectionChanged;
}
private void DocumentRegionActiveAwareBehavior_ActiveWindowChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
if (e.OldValue != null)
{
var item = e.OldValue;
//are we dealing with a ContentPane directly
if (Region.Views.Contains(item) && Region.ActiveViews.Contains(item))
{
Region.Deactivate(item);
}
else
{
//now check to see if we have any views that were injected
var contentControl = item as ContentControl;
if (contentControl != null)
{
var injectedView = contentControl.Content;
if (Region.Views.Contains(injectedView) && Region.ActiveViews.Contains(injectedView))
Region.Deactivate(injectedView);
}
}
}
if (e.NewValue != null)
{
var item = e.NewValue;
//are we dealing with a ContentPane directly
if (Region.Views.Contains(item) && !this.Region.ActiveViews.Contains(item))
{
Region.Activate(item);
}
else
{
//now check to see if we have any views that were injected
var contentControl = item as ContentControl;
if (contentControl != null)
{
var injectedView = contentControl.Content;
if (Region.Views.Contains(injectedView) && !this.Region.ActiveViews.Contains(injectedView))
Region.Activate(injectedView);
}
}
}
}
void ActiveViews_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
if (e.Action == NotifyCollectionChangedAction.Add)
{
//are we dealing with a view
FrameworkElement frameworkElement = e.NewItems[0] as FrameworkElement;
DockingManager contentPane;
if (frameworkElement != null)
{
contentPane = frameworkElement.Parent as DockingManager;
if (contentPane != null)
contentPane.ActiveWindow = frameworkElement;
}
else
{
//must be a viewmodel
object viewModel = e.NewItems[0];
var fElement = GetContentPaneFromViewModel(viewModel);
if (fElement != null)
{
contentPane = frameworkElement.Parent as DockingManager;
contentPane.ActiveWindow = frameworkElement;
}
}
}
}
FrameworkElement GetContentPaneFromViewModel(object viewModel)
{
var panes = (HostControl as DockingManager).Children;
foreach (ContentControl contentcontrol in panes)
{
if (contentcontrol.DataContext == viewModel)
return contentcontrol as FrameworkElement;
}
return null;
}
}
}