public HttpResponseMessage DeleteEssay(Essays obj) { ReturnHelper rh = new ReturnHelper(200, null, 0, ""); try { int i = obj.Delete(" Essayid=@Essayid", obj.Essayid); if (i > 0) { rh.msg = "删除文章成功"; rh.totals = i; } else { rh.msg = "删除文章失败"; rh.code = 400; } } catch (Exception e) { rh.code = 500; rh.msg = "服务器错误,请通知管理员"; } return(ReturnJson(JsonConvert.SerializeObject(rh))); }