public LogModel Add(LogModel item) { LogModel logModel; using (var db = new LogDb()) { var entity = new LogInfo() { UserCode = item.UserCode, UserName = item.UserName, LoginIP = item.LoginIP, LogType = (LogType)item.Type, Operation = item.Operation, Remark = item.Remark, CreateDate = item.CreateDate }; db.LogInfos.Add(entity); var result = db.SaveChanges(); if (result > 0) { logModel = item; logModel.Id = entity.Id; } else { logModel = null; } } return(logModel); }