public async Task<string> SaveAsync(string modelStr)
        {
            var codeModel = JsonConvert.DeserializeObject<Model.GUT_CODE>(modelStr);
            await FillModelAsync(codeModel, false);
            codeModel.SerialModifiedTime = DateTime.Now;
            var result = await _bllCode.UpdateAsync(codeModel);
            //更新缓存, 不需要等待
            new CodeCacheManager(_bllCode).UpdateWholeCodeCacheItemAsync(codeModel);
            return result.ToString();
        }

private async Task FillModelAsync<T>(T model, bool isAdd) where T : BaseModel, new()
        {
            Action<T, bool> fillModel = (m, a) => CommonTool.FillModel(m, a);
            await Task.Factory.FromAsync(fillModel.BeginInvoke, fillModel.EndInvoke, model, isAdd, null);
        }