/// <summary> /// 获取习题有效时间 /// </summary> /// <param name="vguid"></param> /// <returns></returns> public string GetExerciseEffectiveTime(string vguid) { var model = _dl.GetExerciseEffectiveTime(vguid); string effectTime = model.EffectiveDate.ToString("yyyy-MM-dd HH:mm"); return(effectTime); }