public ActionResult Edit(Guid?id) { var head = new Header(); ViewBag.tag = "Header新增"; if (id.HasValue) { head = _iheaderService.GetById(id.Value); ViewBag.tag = "Header编辑"; } //模块 var ListModual = _imodularService.GetAll().Select(t => new { t.Id, t.ModularName }).ToList(); ViewBag.Mo = new SelectList(ListModual, "Id", "ModularName", head.ModularID); return(View(head)); }