WPF TreeView 展开到指定节点

Posted 2022-03-14 wuyaxiansheng

最近在做一个交换机管理的项目，有一个交换机的树，做树的搜索的时候 展开节点居然有点难，自己记录下来 ，以后用的到的时候可以看一下。

展开代码如下，其中

SwitchTree是treeview空间的名称，TreeNode 是绑定在树上的数据类的名称，请注意

private void ExpendTree(TreeNode node)
        
　　　　　　　　
            SwitchTree.UpdateLayout();
            for (int i = 0; i < SwitchTree.Items.Count; i++)
            
                TreeNode findNd = SwitchTree.Items[i] as TreeNode;
                TreeViewItem ti = SwitchTree.ItemContainerGenerator.ContainerFromIndex(i) as TreeViewItem;
                if (findNd == node && ti != null)
                
                    ti.IsExpanded = true;
                    ti.IsSelected = true;
                    if (ti.ItemContainerGenerator.Status != GeneratorStatus.ContainersGenerated)
                    
                        ti.UpdateLayout();
                    
                    //展开
                    EependTreeByNode(ti);
                    break;
                
                else
                
                    if (ti != null)
                    
                       TreeViewItem treeViewItem= RecurFindeNode(node, ti);
                        if (treeViewItem == null)
                        
                            ti.IsExpanded = false;
                            continue;
                        
                        //展开
                        EependTreeByNode(treeViewItem);
                        break;
                    
                    
                
            
            //EependTreeByNode(node);
        

        private TreeViewItem RecurFindeNode(TreeNode n, TreeViewItem items)
        
            TreeViewItem tv = null;
            if (n != null && items != null && items.HasItems)
            
                items.IsExpanded = true;
                foreach (var item in items.Items)
                
                    var node = item as TreeNode;
                    if (node == null || (node.nodes!=null&&!node.nodes.Any()))
                    
                        continue;
                    
                    if (items.ItemContainerGenerator.Status != GeneratorStatus.ContainersGenerated)
                    
                        items.UpdateLayout();
                    
                    TreeViewItem m_item = items.ItemContainerGenerator.ContainerFromItem(item) as TreeViewItem;

                    if (n == node && m_item != null)
                    
                        //EependTreeByNode(m_item);
                        tv = m_item;
                    
                    else
                    
                        
                        TreeViewItem treeNode = RecurFindeNode(n, m_item);
                        if (treeNode != null)
                        
                            tv = treeNode;
                            break;
                        
                        else
                        
                            //items.IsExpanded = false;
                        
                    
                
            

            return tv;
        

        private void EependTreeByNode(TreeViewItem contenier)
        

            if (contenier != null)
            
                //if (contenier.HasItems)
                //
                    contenier.IsExpanded = true;
                    contenier.IsSelected = true;
                //
                //else
                //
                //    TreeViewItem parent = (TreeViewItem)contenier.Parent;
                //    if (parent != null)
                //    
                //        parent.IsExpanded = true;
                //        parent.IsSelected = true;
                //    
                //
                if (contenier.ItemContainerGenerator.Status != GeneratorStatus.ContainersGenerated)
                

                    contenier.UpdateLayout();