大侠们，求Treeview里checkbox父节点被选中，子节点全部被选中。

Question

如题。请大侠们指导指导。

Answer 1

        private void tree_AfterCheck(object sender, System.Windows.Forms.TreeViewEventArgs e)
        {
            if (e.Node.Checked)
            {
                foreach (TreeNode tn in e.Node.Nodes)
                {
                    tn.Checked = true;
                }            }
            else
            {
                foreach (TreeNode tn in e.Node.Nodes)
                {
                    tn.Checked = false;
                }
            }
        }

Answer 2

private void treeView1_AfterCheck(object sender, TreeViewEventArgs e)
        {
            if (e.Action == TreeViewAction.Unknown)
                return;            if (e.Node.Checked)
                CheckAllNodes(e.Node.Nodes);        }        private void CheckAllNodes(TreeNodeCollection nodes)
        {
            foreach (TreeNode n in nodes)
            {
                n.Checked = true;
                if (n.Nodes.Count > 0)
                    CheckAllNodes(n.Nodes);
            }
        }

Answer 3

 private void treeView1_AfterCheck_1(object sender, TreeViewEventArgs e)
        {
              for (int i = 0; i < e.Node.Nodes.Count; i++)
                e.Node.Nodes[i] = e.Node.Checked;                     
        }

Answer 4

   #region "树的选中状态"
        private void EnableCheck(bool bol)
        {
            foreach (TreeNode td in tree_GongNeng.Nodes)
            {
                td.Checked = bol;
                CheckAllChildNodes(td, td.Checked);
            }
        }
        #endregion        #region  选中子节点
        public void CheckAllChildNodes(TreeNode treeNode, bool nodeChecked)
        {
            foreach (TreeNode node in treeNode.Nodes)
            {
                node.Checked = nodeChecked;
                if (node.Nodes.Count > 0)
                {
                    this.CheckAllChildNodes(node, nodeChecked);
                }
            }
        }
        #endregion
    private void tree_GongNeng_AfterCheck(object sender, TreeViewEventArgs e)
        {
           if (e.Node.Nodes.Count > 0)
           {
            CheckAllChildNodes(e.Node, e.Node.Checked);
           }
} private void grv_QuanXianLieBiao_Click(object sender, EventArgs e)
        {
            EnableCheck(false);         
        }