C# TreeView 控件选中父节点后子节点自动全选的代码

 

 

 

 private void StaffSelect(object sender, TreeViewEventArgs e)
        {
            if (e.Action == TreeViewAction.ByMouse)
            {
       
                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);
                }
        }