public async Task IsExist_Shortcut() { xx = string.Empty; var date = DateTime.Parse("2018-08-20 20:33:21.584925"); var id = Guid.Parse("89c9407f-7427-4570-92b7-0165590ac07e"); // 判断 AlipayPaymentRecord 表中是否存在符合条件的数据 bool res1 = await MyDAL_TestDB.IsExistAsync <AlipayPaymentRecord>(it => it.CreatedOn == date && it.OrderId == id); Assert.True(res1); /********************************************************************************************************************************************/ xx = string.Empty; }