public async Task <IActionResult> GetTreeSelectJson(int id) { IEnumerable <SelectColumnEntity> list = await columnService.GetSelectCanUseListAsync(id); var treeList = new List <TreeSelectModel>(); foreach (SelectColumnEntity item in list) { TreeSelectModel treeModel = new TreeSelectModel(); treeModel.id = item.C_ID; treeModel.text = item.C_NAME; treeModel.parentId = item.C_PARENTID; treeList.Add(treeModel); } return(Content(treeList.TreeSelectJson())); }