[WinForm]TreeView 添加右键菜单

关机代码：

        #region 添加右键菜单

        /// <summary>
        /// 添加右键菜单
        /// <para>eg: treeF18.AttachMenu(contextMenuTree, n => n != null);</para>
        /// </summary>
        /// <param name="treeView">TreeView</param>
        /// <param name="contextMenu">ContextMenuStrip</param>
        /// <param name="showContextMenuHanlder">显示ContextMenuStrip规则委托</param>
        public static void AttachMenu(this TreeView treeView, ContextMenuStrip contextMenu, Predicate<TreeNode> showContextMenuHanlder)
        {
            treeView.MouseDown += (sender, e) =>
            {
                TreeView _curTree = sender as TreeView;
                if (e.Button == MouseButtons.Right)
                {
                    Point _clickPoint = new Point(e.X, e.Y);
                    TreeNode _curNode = _curTree.GetNodeAt(_clickPoint);
                    if (showContextMenuHanlder != null)
                    {
                        if (showContextMenuHanlder(_curNode))
                        {
                            _curTree.SelectedNode = _curNode;
                            _curNode.ContextMenuStrip = contextMenu;
                        }
                    }
                }
            };
        }

        #endregion 添加右键菜单

希望有所帮助！
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