C# Controls.TreeViewItem类代码示例

        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            try
            {
                foreach (DriveInfo driveInfo in DriveInfo.GetDrives())
                {
                    TreeViewItem item = new TreeViewItem();
                    item.Header = driveInfo.Name;
                    MessageBox.Show((string)item.Header);

                    if (driveInfo.IsReady)
                    {
                        DirectoryInfo dirInfo = new DirectoryInfo(driveInfo.Name);
                        foreach (DirectoryInfo di in dirInfo.GetDirectories())
                        {
                            item.Items.Add(new TreeViewItem() { Header = di.Name });
                        }
                        foreach (FileInfo fi in dirInfo.GetFiles())
                        {
                            item.Items.Add(new TreeViewItem() { Header = fi.Name });
                        }
                    }
                    this.treeView1.Items.Add(item);
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
        }

 //这里也是分两步，第一步创建一个Header的DataTemplate，第二步每一个Header都添加这个这个DataTemplate
 private void LoadTree()
 {
     DataTemplate template = GetTreeHeaderDataTemplate();
     TreeViewItem AsianItem=new TreeViewItem();
     AsianItem.Header = "亚洲";
     AsianItem.HeaderTemplate = template;
     TreeViewItem EuropeItem=new TreeViewItem();
     EuropeItem.Header = "欧洲";
     EuropeItem.HeaderTemplate = template;
     TreeViewItem chinaItem=new TreeViewItem();
     chinaItem.Header = "中国";
     chinaItem.HeaderTemplate = template;
     TreeViewItem japnaItem = new TreeViewItem();
     japnaItem.Header = "日本";
     japnaItem.HeaderTemplate = template;
     TreeViewItem ukItem = new TreeViewItem();
     ukItem.Header = "英国";
     ukItem.HeaderTemplate = template;
     TreeViewItem denmarkItem = new TreeViewItem();
     denmarkItem.Header = "丹麦";
     denmarkItem.HeaderTemplate = template;
     AsianItem.Items.Add(chinaItem);
     AsianItem.Items.Add(japnaItem);
     EuropeItem.Items.Add(ukItem);
     EuropeItem.Items.Add(denmarkItem);
     this.MainTreeView.Items.Add(AsianItem);
     this.MainTreeView.Items.Add(EuropeItem);
 }

        private void BuildConfictSet(FunctionConflictSet conflictSet, TreeViewItem item, int setIndex)
        {
            if (conflictSet == null || item == null)
                return;

            StringBuilder headerBuidller = new StringBuilder();
            headerBuidller.Append("Конфликтный набор №{0}. ");
            headerBuidller.Append("Функция ");
            headerBuidller.Append(conflictSet.FunctionType.ToString());
            headerBuidller.Append(".");

            TreeViewItem setItem = new TreeViewItem();
            setItem.Header = String.Format(headerBuidller.ToString(), setIndex);

            item.Items.Add(setItem);

            conflictSet.Reset();

            while (conflictSet.ClosedEx == false)
            {
                FunctionGenerationInfo info = conflictSet.CurrentFunction;

                headerBuidller.Clear();
                headerBuidller.Append("Функция \"{0}\". ");
                headerBuidller.Append("Коэффициент релевантности: {1}.");

                TreeViewItem functionItem = new TreeViewItem();
                functionItem.Header = String.Format(headerBuidller.ToString(), info.Function.Name, info.RelevanceLevel);
                setItem.Items.Add(functionItem);

                conflictSet.NextEx();
            }

            conflictSet.Reset();
        }

			private void FillLayers(ItemsControl root)
			{
				foreach (var dwgLayer in dwgDocument.GetLayers())
				{
					var layerItem = new TreeViewItem
					{
						Header = dwgLayer.Name
					};

					FillEntities(layerItem, dwgLayer);
					root.Items.Add(layerItem);

					// Помещаем в таблицу соответствующий слой при его выделении в дереве
					var dwgLayerCopy = dwgLayer;
					layerItem.Selected += delegate(object sender, RoutedEventArgs args)
						{
							// Отсеиваем маршрутизируемые события от дочерних узлов
							if (layerItem.Equals(args.Source) && propertyGrid != null)
								propertyGrid.SelectedObject = dwgLayerCopy;
						};

					// Повторяем в дереве изменения значений имен слоев в таблице
					dwgLayerCopy.NameChanged += (sender, newName) => layerItem.Header = newName;
				}
			}

 public static TreeStatus Save(TreeViewItem treeViewItem)
 {
     if (treeViewItem == null) return null;
     TreeStatus status = new TreeStatus(treeViewItem);
     SaveStatus(treeViewItem, status);
     return status;
 }

		void pageTreeViewItem_DoubleClick(object sender, MouseButtonEventArgs eventArgs) {
			LOG.Debug("spaceTreeViewItem_MouseLeftButtonDown is called!");
			TreeViewItem clickedItem = eventArgs.Source as TreeViewItem;
			if (clickedItem ==null) {
				return;
			}
			Confluence.Page page = clickedItem.Tag as Confluence.Page;
			if (page == null) {
				return;
			}
			if (!clickedItem.HasItems) {
				LOG.Debug("Loading pages for page: " + page.Title);
				(new Thread(() => {
					Dispatcher.BeginInvoke(DispatcherPriority.Normal, (ThreadStart)(() => {ShowBusy.Visibility = Visibility.Visible;}));
					List<Confluence.Page> pages = confluenceConnector.getPageChildren(page);
					Dispatcher.BeginInvoke(DispatcherPriority.Normal, (ThreadStart)(() => {
						foreach(Confluence.Page childPage in pages) {
							LOG.Debug("Adding page: " + childPage.Title);
							TreeViewItem pageTreeViewItem = new TreeViewItem();
							pageTreeViewItem.Header = childPage.Title;
							pageTreeViewItem.Tag = childPage;
							clickedItem.Items.Add(pageTreeViewItem);
							pageTreeViewItem.PreviewMouseDoubleClick += new MouseButtonEventHandler(pageTreeViewItem_DoubleClick);
							pageTreeViewItem.PreviewMouseLeftButtonDown += new MouseButtonEventHandler(pageTreeViewItem_Click);
						}
						ShowBusy.Visibility = Visibility.Collapsed;
					}));
				 }
				) { Name = "Loading childpages for confluence page " + page.Title }).Start();
			}
		}

        private void addLicFileToTree(string filename, bool fileExists = true)
        {
            TreeViewItem RootItem = new TreeViewItem();
            RootItem.IsExpanded = true;
            RootItem.Tag = filename;
            string rootItemName = filename.Split('\\').Last();
            RootItem.Header = rootItemName;

            if (fileExists)
            {
                LicFile file = new LicFile(rootItemName, filename);
                foreach (Product p in file.Products)
                {
                    TreeViewItem product = new TreeViewItem();
                    product.Header = p.ID + ": " + p.currUsersNum + " of " + p.maxUsersNum + " users.";
                    product.IsExpanded = false;
                    foreach (User u in p.Users)
                    {
                        product.Items.Add(u.Name);
                    }
                    RootItem.Items.Add(product);
                }
            }
            else
            {
                TreeViewItem notFoundReport = new TreeViewItem();
                notFoundReport.Header = "Файл не найден";
                RootItem.Items.Add(notFoundReport);
            }

            treeView.Items.Add(RootItem);
            fileNames.AddMonitorFileName(filename);
        }

        public static bool WalkTreeViewItem(TreeView tree, TreeViewItem treeViewItem, object selectedValue)
        {
            if (treeViewItem.DataContext == selectedValue)
            {
                treeViewItem.SetValue(TreeViewItem.IsSelectedProperty, true);
                treeViewItem.Focus();
                treeViewItem.BringIntoView();
                return true;
            }
            var itemsHostProperty = treeViewItem.GetType().GetProperty("ItemsHost", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);

            var itemsHost = itemsHostProperty?.GetValue(treeViewItem, null) as Panel;

            if (itemsHost == null)
            {
                return false;
            }

            foreach (var item in itemsHost.Children.OfType<TreeViewItem>())
            {
                var oldExpanded = item.IsExpanded;
                item.IsExpanded = true;
                item.UpdateLayout();
                if (WalkTreeViewItem(tree, item, selectedValue))
                {
                    return true;
                }
                item.IsExpanded = oldExpanded;
            }

            return false;
        }

 private void ViewLog_Load(object sender, EventArgs e)
 {
     _xmlDoc.Load("log.xml");
     XmlNodeList nodes = _xmlDoc.GetElementsByTagName("date");
     TreeViewLog.Items.Clear();
     TreeViewItem core = new TreeViewItem();
     core.Header = "log";
     List<TreeViewItem> firstLevel = new List<TreeViewItem>();
     int n = 0;
     foreach (XmlNode node in nodes)
     {
         firstLevel.Add(new TreeViewItem());
         firstLevel[n].Header = node.Attributes["id"].Value;
         List<TreeViewItem> secondLevel = new List<TreeViewItem>();
         int k=0;
         foreach (XmlNode m in node.ChildNodes)
         {
             string str = m.Attributes["name"].Value + " " + m.Attributes["status"].Value;
             secondLevel.Add(new TreeViewItem());
             secondLevel[k].Header = str;
             firstLevel[n].Items.Add(secondLevel[k]);
             k++;
         }
         core.Items.Add(firstLevel[n]);
         n++;
     }
     TreeViewLog.Items.Add(core);
 }

        /// <summary>
        /// Handles the TreeView item visible changed.
        /// </summary>
        /// <param name="sender">The sender.</param>
        /// <param name="e">The <see cref="DependencyPropertyChangedEventArgs" /> instance containing the event data.</param>
        private void HandleTreeViewItemVisibleChanged(object sender, DependencyPropertyChangedEventArgs e)
        {
            var selectedItem = sender as TreeViewItem;

             // whenever a TreeViewItem becomes visible re-calculate its sub-items
             if (selectedItem != null && selectedItem.IsVisible)
             {
            var dump = selectedItem.DataContext as IObjectDump;

            if (dump != null)
            {
               // remove old sub-items
               foreach (TreeViewItem oldSubItem in selectedItem.Items)
               {
                  oldSubItem.IsVisibleChanged -= HandleTreeViewItemVisibleChanged;
               }

               selectedItem.Items.Clear();

               // add new sub-items for public fields, properties and enumerable members
               foreach (IObjectDump subItemDump in dump.PublicFields.Union(dump.Properties).Union(dump.EnumerableMembers))
               {
                  var newSubItem = new TreeViewItem {Header = subItemDump.ObjectName, DataContext = subItemDump};
                  newSubItem.IsVisibleChanged += HandleTreeViewItemVisibleChanged;
                  selectedItem.Items.Add(newSubItem);
               }
            }
             }
        }

 public TreeViewItem[] GetNew()
 {
     ArrayList r = new ArrayList(ForgeNew.Length);
     TreeViewItem t = new TreeViewItem();
     foreach (ForgeVersion Forge in ForgeNew)
     {
         if (Forge.installer == null)
         {
             continue;
         }
         if (t.Header == null)
         {
             t.Header = Forge.mcver;
         }
         if (t.Header.ToString() != Forge.mcver)
         {
             t = new TreeViewItem();
             r.Add(t);
         }
         if (ForgeDownloadUrl.ContainsKey(Forge.vername))
             ForgeDownloadUrl[Forge.vername] = Forge.installer[1];
         else
             ForgeDownloadUrl.Add(Forge.vername, Forge.installer[1]);
         if (ForgeChangeLogUrl.ContainsKey(Forge.vername))
             ForgeChangeLogUrl[Forge.vername] = Forge.installer[1];
         else
             ForgeChangeLogUrl.Add(Forge.vername, Forge.changelog);
         t.Items.Add(Forge.vername);
         Logger.log("获取Forge"+Forge.vername);
     }
     return r.ToArray(typeof(TreeViewItem)) as TreeViewItem[];
 }

        private TreeViewItem FindNode(TreeViewItem parentNode, ItemCollection nodes, string directory, int attemptNumber = 1)
        {
            if (attemptNumber < 1)
                throw new ArgumentOutOfRangeException("attemptNumber", attemptNumber, "attemptNumber must be >= 1");

            if (attemptNumber > 2)
            {
                return parentNode;
            }

            List<TreeViewItem> childNodes = new List<TreeViewItem>();
            foreach (TreeViewItem childNode in nodes)
            {
                childNodes.Add(childNode);
                DirectoryTreeNode dirNode = childNode as DirectoryTreeNode;
                if (dirNode == null)
                    continue;

                if (string.Compare(dirNode.Directory, directory, true) == 0)
                {
                    return dirNode;
                }
            }

            UpdateNodeChildren((DirectoryTreeNode)parentNode);

            TreeViewItem node = FindNode(parentNode, parentNode.Items, directory, attemptNumber + 1);
            return node;
        }

        //private static void ProcessNode(HtmlNode node, Stack<HtmlNode> stack)
        //{
        //    var depth = stack.Count;
        //    var padding = String.Empty.PadLeft(depth, ' ');
        //    stack.Push(node);
        //    try
        //    {
        //        Debug.WriteLine(padding + "Node: " + node.Name);
        //        foreach (var child in node.ChildNodes)
        //        {
        //            ProcessNode(child, stack);
        //        }
        //    }
        //    finally
        //    {
        //        stack.Pop();
        //    }
        //}

        private void button_Click(object sender, RoutedEventArgs e)
        {
            using (var stream = File.OpenRead(@"C:\Documents\bookmarks_7_27_15.html"))
            {
                var doc = new HtmlDocument();
                doc.Load(stream);

                var rootFolder = new Folder { Name = "<root>" };

                ProcessNode(doc.DocumentNode, rootFolder);
                if (rootFolder.Folders.Count == 1)
                    rootFolder = rootFolder.Folders.Single();

                treeView.Items.Add(GetTree(rootFolder));

                var bookmarks = rootFolder.AllBookmarks.ToList();
                bookmarks.Sort(
                    (l, r) => StringComparer.OrdinalIgnoreCase.Compare(l.Href.ToString(), r.Href.ToString()));
                var lookupItem = new TreeViewItem { Header = "Lookup" };
                var lookup = rootFolder.AllBookmarks.ToLookup(b => b.Href.ToString(), b => b.Folder, StringComparer.OrdinalIgnoreCase);
                foreach (var key in lookup)
                {
                    var folders = new HashSet<string>(key.Select(k => k.FullName), StringComparer.OrdinalIgnoreCase);
                    if (folders.Count > 1)
                    {
                        //folders.Sort((l, r) => StringComparer.OrdinalIgnoreCase.Compare(l.FullName, r.FullName));
                        var keyItem = new TreeViewItem { Header = key.Key + " (" + folders.Count + ")" };
                        foreach (var folder in folders.OrderBy(f => f, StringComparer.OrdinalIgnoreCase))
                            keyItem.Items.Add(new TreeViewItem { Header = folder });
                        lookupItem.Items.Add(keyItem);
                    }
                }
                lookupItem.ExpandSubtree();
                treeView.Items.Add(lookupItem);
                var set = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
                foreach (var bookmark in rootFolder.AllBookmarks)
                    set.Add(bookmark.ToString());
                foreach (var txt in set)
                    Debug.WriteLine(txt);

                using (var output = File.OpenWrite(@"C:\Documents\output.html"))
                {
                    output.SetLength(0);
                    using (var writer = new StreamWriter(output))
                    {

                        writer.WriteLine(@"<!DOCTYPE NETSCAPE-Bookmark-file-1>");
                        writer.WriteLine(@"<!-- This is an automatically generated file.");
                        writer.WriteLine(@"     It will be read and overwritten.");
                        writer.WriteLine(@"     DO NOT EDIT! -->");
                        writer.WriteLine(
                            "<META HTTP-EQUIV=\"Content-Type\" CONTENT=\"text/html;charset=UTF-8\">");
                        writer.WriteLine(@"<TITLE>Bookmarks</TITLE>");
                        WriteFolder(rootFolder, writer, new HashSet<string>(StringComparer.OrdinalIgnoreCase), "");
                    }
                }

                //Debugger.Break();
            }
        }

        private void ProcessElement(DependencyObject element, TreeViewItem previousItem)
        { 
            // Create a TreeViewItem for the current element
            TreeViewItem item = new TreeViewItem();
            item.Header = element.GetType().Name;
            item.IsExpanded = true;

            // Check whether this item should be added to the root of the tree
            //(if it's the first item), or nested under another item.
            if (previousItem == null)
            {
                treeElements.Items.Add(item);
            }
            else
            {
                previousItem.Items.Add(item);
            }

            // Check if this element contains other elements
            for (int i = 0; i < VisualTreeHelper.GetChildrenCount(element); i++)
            {
                // Process each contained element recursively
                ProcessElement(VisualTreeHelper.GetChild(element, i), item);
            }
        }

		public MainWindow()
		{
			this.InitializeComponent();

            
           

            treeitem = new List<TreeViewItem>();


            entityproperty = new EntityProperty();
            entityproperty.Name = myThumb1.Title;

            ent = new TreeViewItem();

            ent.Header = entityproperty.Name;

            

            treeitem.Add(ent);
            
            



            treeView1.ItemsSource = treeitem;


            
            
			// Insert code required on object creation below this point.
		}