树结构后台写法

        #region 获取部门列表树集合

        /// <summary>

        /// 获取部门列表树集合

        /// </summary>

        /// <returns></returns>

        public string GetOrganizationList()

        {

            System.Collections.IList orgainList = organizationibll.GetList();//获取部门方法

            IsoDateTimeConverter timeConverter = new IsoDateTimeConverter();

            timeConverter.DateTimeFormat = "yyyy'-'MM'-'dd' 'HH':'mm':'ss";

            List<SYS_Organization> listtree = SysManager.Common.Utilities.IListHelper.IListToList<SYS_Organization>(orgainList);//将IList 转化成List

            SYS_Organization orgobj = listtree.Find(org => org.ParentId == "0");//构造顶级节点//（数据库中用的是O）

            LEFTTREE lefttree = new LEFTTREE();

            lefttree.ID = orgobj.OrganizationId;

            lefttree.TEXT = orgobj.FullName;

            lefttree.CHILDREN = new List<LEFTTREE>();

            TreeDiGui(lefttree.ID, lefttree, listtree);

            return "["+JsonConvert.SerializeObject(lefttree).Replace("TEXT", "text").Replace("ID", "id").Replace("CHILDREN", "children")+"]";

        }

        #endregion

        #region 查找树的子节点

        /// <summary>

        /// 查找树的子节点

        /// </summary>

        /// <param name="sb"></param>

        /// <param name="ParentId"></param>

        /// <returns></returns>

        public LEFTTREE TreeDiGui(string ParentId, LEFTTREE LEFTTREE, IEnumerable<SYS_Organization> ALLTREE)

        {

            //

            IEnumerable<SYS_Organization> FindTree = ALLTREE.Where(new Func<SYS_Organization, bool>(d => d.ParentId == ParentId));

            foreach (SYS_Organization item in FindTree)

            {

                LEFTTREE ChildTree = new LEFTTREE();

                ChildTree.ID = item.OrganizationId;

                ChildTree.TEXT = item.FullName;

                ChildTree.CHILDREN = new List<LEFTTREE>();

                // ChildTree.CHILDREN.Add(ChildTree);

                LEFTTREE.CHILDREN.Add(ChildTree);

                TreeDiGui(ChildTree.ID, ChildTree, ALLTREE);

            }

            return LEFTTREE;

        }

        #endregion