Winform treeview重命名那些事

        int nodeIndex = 0;
        bool nodeChanged = false;
        string nodeName = null;

        private void treeView1_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)
        {
            if (e.Node.Tag==null) {
                return;
            }
            if (e.Button == MouseButtons.Right)
            {
                e.Node.BeginEdit();
            }
        }

        private void treeView1_AfterLabelEdit(object sender, NodeLabelEditEventArgs e)
        {
            if (e.Node.Tag == null)
            {
                return;
            }
            nodeName = e.Node.Text;
            nodeIndex = e.Node.Index;
            nodeChanged = true;
            e.Node.EndEdit(true);
        }

        private void treeView1_NodeMouseHover(object sender, TreeNodeMouseHoverEventArgs e)
        {
            if (nodeChanged == true)
            {                
                if (treeView1.Nodes[nodeIndex].Text != nodeName) {
                    MessageBoxButtons mess = MessageBoxButtons.OKCancel;
                    DialogResult dr = MessageBox.Show("请问是否修改当前的关键词修改为\n\r[" + nodeName+"===>" + treeView1.Nodes[nodeIndex].Text+ "]？", "提示", mess);
                    if (dr == DialogResult.OK)
                    {
                        var db = new SQLiteConnection(db_Path);
                        int cid = Convert.ToInt32(treeView1.Nodes[nodeIndex].Tag);
                        Key_words K = new Key_words() { Id = cid };
                        K.Name = treeView1.Nodes[nodeIndex].Text;
                        db.Update(K);
                        MessageBox.Show("修改成功~");
                        Read_keyworks();
                    }
                    else {
                        treeView1.Nodes[nodeIndex].Text = nodeName;
                    }
                }
                nodeChanged = false;
            }
        }