void LoadModel()        {            //清空当前的结构树信息            treeView1.Nodes.Clear();            //当前加载的模型            Document doc = Autodesk.Navisworks.Api.Application.ActiveDocument;                        //循环现有模型            foreach (var documentModel in doc.Models)            {                              var modelItemList = documentModel.RootItem.Descendants;                Model model = documentModel;                var modelItems = modelItemList.Where(o => o.Parent == model.RootItem);                           if (modelItems.Any())                {                    TreeNode cNode;                    foreach (var quItem in modelItems)                    {                         cNode = new TreeNode(quItem.DisplayName);                        cNode.Tag = quItem;                       // cNode.Text = quItem.DisplayName;//判断名称                        treeView1.Nodes.Add(cNode);                        if (quItem.Children.Any())                        {                            LoadChild(quItem.Children, quItem, cNode);                           }                                                     }                }                            }          }        /// <summary>        /// 递归判断结构树信息        /// </summary>        /// <param name="modelItemEnumerableCollection">数据源信息</param>        /// <param name="parentItem">父级节点信息</param>        /// <param name="pNode">子节点信息</param>        private void LoadChild(IEnumerable<ModelItem> modelItemEnumerableCollection, ModelItem parentItem, TreeNode pNode)        {            var query = modelItemEnumerableCollection.Where(o => o.Parent == parentItem);            if (query.Count()>0)            {                foreach (var quItem in query)                {                    TreeNode chNode = new TreeNode(quItem.DisplayName);                    chNode.Tag = quItem;                    pNode.Nodes.Add(chNode);                    if (quItem.Children.Any())                    {                        LoadChild(quItem.Children, quItem, chNode);                    }                                  }            }        }

       void treeView1_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)        {            TreeNode node = e.Node;            if (node != null)            {                ModelItem oCurrentNode = (ModelItem)node.Tag;                propertyGrid1.SelectedObject = oCurrentNode;                if (oCurrentNode != null)                {                    //设置选择集合                    ModelItemCollection oMC = new ModelItemCollection();                    oMC.Add(oCurrentNode);                    Document oDoc = view.ViewControl.DocumentControl.Document;                    //设置选中                    oDoc.CurrentSelection.CopyFrom(oMC);                }          }        }