winform Treeview 学习中

1.遍历list<T>把数据添加到treeview上

TreeNode tn = new TreeNode();
            tn.Text = "用户";

            foreach (CustomerServ item in a.Results)
            {
                tn.Nodes.Add(item.Mac, item.Mac);
                tn.Nodes[item.Mac].Nodes.AddRange(new TreeNode[] {               
                  new TreeNode(){ Text="Mac地址："+ item.Mac},
                  new TreeNode(){ Text="IP地址："+ item.Ip},
                  new TreeNode(){ Text="PackId："+ item.PackId.ToString()},
                  new TreeNode(){ Text="Port："+ item.Port},
                  new TreeNode(){ Text="Protocol："+ item.Protocol}
                });
            }
            treeView1.Nodes.Add(tn);

2.展开节点

 //定义根节点
       treeView1.SelectedNode = treeView1.Nodes[0];
 //展开所有节点
       treeView1.SelectedNode.ExpandAll();
//展开所有子节点
       tvResult.SelectedNode.Expand();

3.折叠节点

 //定位根节点

      treeView1.SelectedNode = treeView1.Nodes[0];

  //折叠组件中所有节点

      treeView1.SelectedNode.Collapse();

4.checked节点

 private void treeView1_AfterCheck(object sender, TreeViewEventArgs e)
        {

            if (e.Action == TreeViewAction.ByMouse)
            {
                // textBox1.Text = e.Node.Text;
                if (e.Node.Checked)
                {
                    //取消节点选中状态之后，取消所有父节点的选中状态

                    setChildNodeCheckedState(e.Node, true);

                }
                else
                {
                    //取消节点选中状态之后，取消所有父节点的选中状态
                    setChildNodeCheckedState(e.Node, false);
                    //如果节点存在父节点，取消父节点的选中状态
                    if (e.Node.Parent != null)
                    {
                        setParentNodeCheckedState(e.Node, false);
                    }
                }
            }

        }

        //取消节点选中状态之后，取消所有父节点的选中状态
        private void setParentNodeCheckedState(TreeNode currNode, bool state)
        {
            TreeNode parentNode = currNode.Parent;

            parentNode.Checked = state;
            if (currNode.Parent.Parent != null)
            {
                setParentNodeCheckedState(currNode.Parent, state);
            }
        }
        //选中节点之后，选中节点的所有子节点
        private void setChildNodeCheckedState(TreeNode currNode, bool state)
        {
            TreeNodeCollection nodes = currNode.Nodes;
            if (nodes.Count > 0)
                foreach (TreeNode tn in nodes)
                {

                    tn.Checked = state;
                    setChildNodeCheckedState(tn, state);
                }
        }

 5.删除选中节点　

  public void DeleteNote(TreeView tv)
        {
            List<TreeNode> IsDeleteTag = new List<TreeNode>();
            foreach (TreeNode node in tv.Nodes)
            {
                if (node.Checked)
                {
                    IsDeleteTag.Add(node);
                    continue;
                }
                DeleteSelectChild(node, ref IsDeleteTag);
            }
            foreach (TreeNode node in IsDeleteTag)
            {
                tv.Nodes.Remove(node);
            }
        }

        public void DeleteSelectChild(TreeNode tnTarget, ref List<TreeNode> lsDeleteTask)
        {
            foreach (TreeNode child in tnTarget.Nodes)
            {
                if (child.Checked)
                {
                    lsDeleteTask.Add(child);
                    continue;
                }
                DeleteSelectChild(child, ref lsDeleteTask);
            }
        }
        private void btnRemove_Click(object sender, EventArgs e)
        {
            DeleteNote(treeView1);
        }