public class MenuModel{/// <summary>/// ID/// </summary>public int ID { get; set; }/// <summary>/// 菜单名/// </summary>public string MenuName { get; set; }/// <summary>/// 父菜单/// </summary>public int ParentID { get; set; }}public class TreeModel{/// <summary>/// ID/// </summary>public string id { get; set; }/// <summary>/// 节点名称/// </summary>public string text { get; set; }/// <summary>/// 是否展开/// </summary>public string state  { get; set; }/// <summary>/// 图标样式/// </summary>public string iconCls { get; set; }/// <summary>/// 子节点集合/// </summary>public List<TreeModel> children { get; set; }}public List<TreeModel> GetTreeList(int ParentID){List<TreeModel> TreeList = new List<TreeModel>();List<MenuModel> ModelList = GetChildMenuList(ParentID);foreach (var item in ModelList){TreeModel m = new TreeModel();m.id = item.ID.ToString();m.text = item.MenuName.ToString();m.children = GetTreeList(item.ID);TreeList.Add(m);}return TreeList;}/// <summary>/// 获取所有菜单数据/// </summary>/// <returns></returns>public List<MenuModel> GetAllMenuList(){List<MenuModel> list = new List<MenuModel>();list.Add(new MenuModel { ID = 1, MenuName = "菜单1", ParentID = 0 });list.Add(new MenuModel { ID = 2, MenuName = "菜单1.1", ParentID = 1 });list.Add(new MenuModel { ID = 3, MenuName = "菜单1.1.1", ParentID = 2 });list.Add(new MenuModel { ID = 4, MenuName = "菜单2", ParentID = 0 });return list;}/// <summary>/// 根据父节点获取子节点/// </summary>/// <param name="ParentID"></param>/// <returns></returns>public List<MenuModel> GetChildMenuList(int ParentID){List<MenuModel> list = GetAllMenuList();var result =list.Where(x => x.ParentID == ParentID);return result.ToList();}

List<TreeModel> list = GetTreeList(0);
string json = new JavaScriptSerializer().Serialize(list);

[{"id": "1","text": "菜单1","state": null,"iconCls": null,"children": [{"id": "2","text": "菜单1.1","state": null,"iconCls": null,"children": [{"id": "3","text": "菜单1.1.1","state": null,"iconCls": null,"children": []}]}]},{"id": "4","text": "菜单2","state": null,"iconCls": null,"children": []}]