/// <summary>

        /// 绑定TreeView

        /// </summary>

        public void BindTreeView()

        {

            BLL.GroupBLL GroupBll = new BLL.GroupBLL();

            DataTable GroupTable = GroupBll.GetGroup();

            //先绑定根节点

            for (int i = 0; i < GroupTable.Rows.Count; i++)

            {

                TreeNode NoteFather = new TreeNode(GroupTable.Rows[i]["Group"].ToString());

                this.TV_Power.Nodes.Add(NoteFather);

                this.TV_Power.Nodes[i].Value = GroupTable.Rows[i]["ID"].ToString();

                BLL.UserBLL UserBll=new BLL.UserBLL ();

                DataTable UserTable = UserBll.GetAllUser(Convert.ToInt32(GroupTable.Rows[i]["ID"]));

                //再绑定子节点

                for (int j = 0; j < UserTable.Rows.Count; j++)

                {

                    TreeNode NoteChild = new TreeNode(UserTable.Rows[j]["Name"].ToString());

                    this.TV_Power.Nodes[i].ChildNodes.Add(NoteChild);

                    this.TV_Power.Nodes[i].ChildNodes[j].ShowCheckBox = true;

                    this.TV_Power.Nodes[i].ChildNodes[j].Value = UserTable.Rows[j]["ID"].ToString();                  

                }

            }

        }

        StringBuilder Power = new StringBuilder();

        /// <summary>

        /// 读取TreeView节点的Value

        /// </summary>

        /// <param name="nodes"></param>

        /// <returns></returns>

        public string GetTreeViewValue(TreeNodeCollection nodes)

        {

            

            foreach (TreeNode tn in nodes)

            {

                if (tn.Checked && tn.ChildNodes.Count == 0)

                {

                    Power.Append(tn.Value + ",");

                }

                GetTreeViewValue(tn.ChildNodes);

            }

            return Power.ToString();

        }