public async Task <ActionResult> Add(Links links) { var entry = await LinksService.GetByIdAsync(links.Id); bool b; if (entry is null) { b = await LinksService.AddEntitySavedAsync(links) > 0; } else { entry.Url = links.Url; entry.Except = links.Except; entry.Name = links.Name; entry.Recommend = links.Recommend; b = await LinksService.SaveChangesAsync() > 0; } return(b ? ResultData(null, message: "添加成功!") : ResultData(null, false, "添加失败!")); }