Question

我正在使用https://compositewpfcontrib.svn.codeplex.com/svn/Trunk/src/Extensions.Infragistics/Composite.Wpf.Infragistics/CompositeWPFContrib.Composite.Wpf.Infragistics/XamDockManager/Regions/TabGroupPaneRegionAdapter.cs中的TabGroupPaneRegionAdapter。

我遇到的问题是contentpane的Closed事件执行了两次，这可能是由于行'contentPane.ExecuteCommand（ContentPaneCommands.Close）;'这意味着当按下交叉按钮并且第一次调用关闭事件时，它仍然存在于xamDockManager中，因此行“contentPane.ExecuteCommand（ContentPaneCommands.Close）;”执行并再次调用已关闭的事件。任何想法如何解决这个问题。

以下是适配器代码的一部分：

private void OnViewsCollectionChanged(object sender, NotifyCollectionChangedEventArgs e, IRegion region, TabGroupPane regionTarget)
    {
        if (e.Action == NotifyCollectionChangedAction.Add)
        {
            //Add content panes for each associated view. 
            foreach (object item in e.NewItems)
            {
                UIElement view = item as UIElement;

                if (view != null)
                {
                    ContentPane newContentPane = new ContentPane();
                    newContentPane.Content = item;
                    //if associated view has metadata then apply it.
                    if (view.GetTabGroupPaneMetadata() != null)
                    {
                        newContentPane.Header = (view.GetTabGroupPaneMetadata()).Header;
                    }
                    //When contentPane is closed remove the associated region 
                    newContentPane.Closed += delegate(object contentPaneSender, PaneClosedEventArgs args)
                    {
                        OnContentPaneClosed((ContentPane)contentPaneSender, args, region);
                    };


                    regionTarget.Items.Add(newContentPane);
                }
            }
        }
        else
        {
            if (e.Action == NotifyCollectionChangedAction.Remove)
            {
                //Associated View has been removed => remove the associated ContentPane from XamDockManager
                XamDockManager xamDockManager = regionTarget.FindDockManager();
                IEnumerable<ContentPane> contentPanes = xamDockManager.GetPanes(PaneNavigationOrder.VisibleOrder);

                foreach (ContentPane contentPane in contentPanes)
                {
                    if (e.OldItems.Contains(contentPane.Content))
                    {
                        contentPane.Content = null;
                        contentPane.CloseAction = PaneCloseAction.RemovePane;
                        contentPane.ExecuteCommand(ContentPaneCommands.Close);
                    }
                }


            }
        }
    }

    private void OnContentPaneClosed(ContentPane contentPane, PaneClosedEventArgs args, IRegion region)
    {
        object view = contentPane.Content;
        if (region.Views.Contains(view))
        {
            region.Remove(view);
        }
    }

非常感谢任何帮助。伊马德。

Answer 1

我相信你可以在这里关注同样的事情来跟踪Infragistics论坛主题：

http://www.infragistics.com/community/forums/t/73207.aspx

Answer 2

这里有一个更好的xamDockManager区域适配器。

http://brianlagunas.com/xamdockmanageran-updated-prism-region-adapter/

用于infragistics的TabGroupPaneRegionAdapter问题

2 个答案: