winform TreeView 节点选择

public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        string tag = "True";

        StringBuilder nodesTag;

        /// <summary>

        /// 全选

        /// </summary>

        /// <param name="treeNode"></param>

        /// <param name="nodeChecked"></param>

        private void CheckAllChildNodes(TreeNode treeNode, bool nodeChecked)

        {

            foreach (TreeNode node in treeNode.Nodes)

            {

                node.Checked = nodeChecked;

                node.Tag = tag;////记得在这里为选中的项目设置tag属性

                if (node.Nodes.Count > 0)

                {

                    this.CheckAllChildNodes(node, nodeChecked);

                }

            }

        }



        private void TraversNodes(TreeNode parent)

        {

            TreeNode node = parent;

            if (node != null)

            {

                if (node.Tag != null && node.Tag.ToString() == tag)

                    nodesTag.AppendFormat("node:{0} has checked\n", node.Text);



                if (node.FirstNode != null)////如果node节点还有子节点则进入遍历

                {

                    TraversNodes(node.FirstNode);

                }

                if (node.NextNode != null)////如果node节点后面有同级节点则进入遍历

                {

                    TraversNodes(node.NextNode);

                }

            }

        }

        /// <summary>

        /// 已选中或取消选中框发生事件

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void treeView1_AfterCheck(object sender, TreeViewEventArgs e)

        {

            if (e.Action != TreeViewAction.Unknown)

            {

                TreeNode node = e.Node;

                if (node.Tag == null)

                    node.Tag = tag;//附加结点信息

                else

                    node.Tag = null;



                CheckAllChildNodes(e.Node, e.Node.Checked);



                //选中父节点 

                bool bol = true;

                if (e.Node.Parent != null)

                {

                    for (int i = 0; i < e.Node.Parent.Nodes.Count; i++)

                    {

                        if (!e.Node.Parent.Nodes[i].Checked)

                            bol = false;

                    }

                    e.Node.Parent.Checked = bol;



                    ////记得如果父节点被选中或取消，记得设置它的tag

                    if (bol)

                    {

                        e.Node.Parent.Tag = tag;

                    }

                    else

                    {

                        e.Node.Parent.Tag = null;

                    }

                }

            }

        }

    }