请教一个有关TreeView控件使用的问题 怎么读取TreeView的节点

Question

因最近在在学着做一个成绩管理系统，里面有一个权限设置的界面，大致像下面的情况
—系统设置
   —密码修改
   —权限设置
—成绩管理
  —编辑学生成绩
  —学生成绩排名与分析

由于不知道怎么在这里插入图片，所以就用上面的形式显示，其中每一个节点都是一个CheckBox当用鼠标选中其中的节点时，我要怎么去获取当前那些被选中的节点，以便修改数据库所存的权限。数据库中有一个表 RoleRight(RoleID,MenuItemName,RoleRight)//RoleRight=0,表示无权使用该菜单由于初学C#，所以对N多控件不熟悉，不知道怎么用，请各位大侠多多指教！

Answer 1

  /// <summary>
        /// 判断选中的树节点
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void treeView1_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)
        { 
            if (e.Node.Name.Split('|')[0] == "class")//选中了班级节点
            {
                //MessageBox.Show("点击了班级" + e.Node.Name.Split('|')[1], "景格软件", MessageBoxButtons.OK);
                string strcode = e.Node.Name.Split('|')[1].ToString();
                this.listView1.Items.Clear();
                DataTable dt = BLL.TeacherBLL.Querryclassshixun(strcode);
                DataView dbv = dt.DefaultView;
                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    ListViewItem lv = new ListViewItem();
                    lv.SubItems[0].Text = dt.Rows[i]["Expr3"].ToString();
                    lv.SubItems.Add(dt.Rows[i]["Expr4"].ToString());
                    lv.SubItems.Add(dt.Rows[i]["Expr9"].ToString());
                    lv.SubItems.Add(dt.Rows[i]["Expr10"].ToString());
                    lv.SubItems.Add(dt.Rows[i]["HistoryTroubleList"].ToString());
                    lv.SubItems.Add(dt.Rows[i]["TrainingDate"].ToString());
                    lv.SubItems.Add(dt.Rows[i]["Trainingid"].ToString());
                    this.listView1.Items.Add(lv);
                }
            }
            else if (e.Node.Name.Split('|')[0] == "student")//选中了学生节点
            {
                string code = e.Node.Name.Split('|')[1].ToString();
                this.listView1.Items.Clear();
                DataTable dt = BLL.TeacherBLL.Queershixun(code);
                DataView dbv = dt.DefaultView;
                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    ListViewItem lv = new ListViewItem();
                    lv.SubItems[0].Text = dt.Rows[i]["Expr3"].ToString();
                    lv.SubItems.Add(dt.Rows[i]["Expr4"].ToString());
                    lv.SubItems.Add(dt.Rows[i]["Expr9"].ToString());
                    lv.SubItems.Add(dt.Rows[i]["Expr10"].ToString());
                    lv.SubItems.Add(dt.Rows[i]["HistoryTroubleList"].ToString());
                    lv.SubItems.Add(dt.Rows[i]["TrainingDate"].ToString());
                    lv.SubItems.Add(dt.Rows[i]["Trainingid"].ToString());
                    this.listView1.Items.Add(lv);
                }
            }
            else
            {
                    this.listView1.Items.Clear();
                    DataTable dt = BLL.TeacherBLL.QuerryAllshixun();
                    DataView dbv = dt.DefaultView;
                    for (int i = 0; i < dt.Rows.Count; i++)
                    {
                        ListViewItem lv = new ListViewItem();
                        lv.SubItems[0].Text = dt.Rows[i]["Expr3"].ToString();
                        lv.SubItems.Add(dt.Rows[i]["Expr4"].ToString());
                        lv.SubItems.Add(dt.Rows[i]["Expr9"].ToString());
                        lv.SubItems.Add(dt.Rows[i]["Expr10"].ToString());
                        lv.SubItems.Add(dt.Rows[i]["HistoryTroubleList"].ToString());
                        lv.SubItems.Add(dt.Rows[i]["TrainingDate"].ToString());
                        lv.SubItems.Add(dt.Rows[i]["Trainingid"].ToString());
                        this.listView1.Items.Add(lv);
                    }
            }
            
            
        }

Answer 2

  /// <summary>
        /// 判断选中的树节点
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void treeView1_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)
        { 
            if (e.Node.Name.Split('|')[0] == "class")//选中了班级节点
            {
                //MessageBox.Show("点击了班级" + e.Node.Name.Split('|')[1], "景格软件", MessageBoxButtons.OK);
                string strcode = e.Node.Name.Split('|')[1].ToString();
                this.listView1.Items.Clear();
                DataTable dt = BLL.TeacherBLL.Querryclassshixun(strcode);
                DataView dbv = dt.DefaultView;
                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    ListViewItem lv = new ListViewItem();
                    lv.SubItems[0].Text = dt.Rows[i]["Expr3"].ToString();
                    lv.SubItems.Add(dt.Rows[i]["Expr4"].ToString());
                    lv.SubItems.Add(dt.Rows[i]["Expr9"].ToString());
                    lv.SubItems.Add(dt.Rows[i]["Expr10"].ToString());
                    lv.SubItems.Add(dt.Rows[i]["HistoryTroubleList"].ToString());
                    lv.SubItems.Add(dt.Rows[i]["TrainingDate"].ToString());
                    lv.SubItems.Add(dt.Rows[i]["Trainingid"].ToString());
                    this.listView1.Items.Add(lv);
                }
            }
            else if (e.Node.Name.Split('|')[0] == "student")//选中了学生节点
            {
                string code = e.Node.Name.Split('|')[1].ToString();
                this.listView1.Items.Clear();
                DataTable dt = BLL.TeacherBLL.Queershixun(code);
                DataView dbv = dt.DefaultView;
                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    ListViewItem lv = new ListViewItem();
                    lv.SubItems[0].Text = dt.Rows[i]["Expr3"].ToString();
                    lv.SubItems.Add(dt.Rows[i]["Expr4"].ToString());
                    lv.SubItems.Add(dt.Rows[i]["Expr9"].ToString());
                    lv.SubItems.Add(dt.Rows[i]["Expr10"].ToString());
                    lv.SubItems.Add(dt.Rows[i]["HistoryTroubleList"].ToString());
                    lv.SubItems.Add(dt.Rows[i]["TrainingDate"].ToString());
                    lv.SubItems.Add(dt.Rows[i]["Trainingid"].ToString());
                    this.listView1.Items.Add(lv);
                }
            }
            else
            {
                    this.listView1.Items.Clear();
                    DataTable dt = BLL.TeacherBLL.QuerryAllshixun();
                    DataView dbv = dt.DefaultView;
                    for (int i = 0; i < dt.Rows.Count; i++)
                    {
                        ListViewItem lv = new ListViewItem();
                        lv.SubItems[0].Text = dt.Rows[i]["Expr3"].ToString();
                        lv.SubItems.Add(dt.Rows[i]["Expr4"].ToString());
                        lv.SubItems.Add(dt.Rows[i]["Expr9"].ToString());
                        lv.SubItems.Add(dt.Rows[i]["Expr10"].ToString());
                        lv.SubItems.Add(dt.Rows[i]["HistoryTroubleList"].ToString());
                        lv.SubItems.Add(dt.Rows[i]["TrainingDate"].ToString());
                        lv.SubItems.Add(dt.Rows[i]["Trainingid"].ToString());
                        this.listView1.Items.Add(lv);
                    }
            }
            
            
        }

Answer 3

简单点就是：this.TreeView1.SelectedNode.Value;获取节点的指