任务扩展以应对应用范围内的服务调用

Question

我在 xamarin 工作并尝试使用一种方法使用所有服务。为此，我编写了一个 TaskExtension。这样我就可以从应用程序的每个页面调用该扩展方法。这是为了禁用按钮，显示加载屏幕，响应处理并从一个角度满足异常处理。我在下面附上我的代码。需要您对此解决方案的专家意见

这是我的扩展类

public static class TaskExtensions

{

    public static async Task<ResultViewModel<U>> ExecuteAsyncOperation<U>(this Task<HttpResponseMessage> operation, object sender = null)

    {

        ResultViewModel<U> resultModel = new ResultViewModel<U>();

        Button button = BeforeAsyncCall(sender);

        try

        {

            await BackgroundOperation(operation, resultModel);

        }

        catch (Exception ex)

        {

            resultModel.Status = HttpStatusCode.InternalServerError;

            resultModel.Errors = new List<string>() { "Some error occurred. Please try again." };

        }

        finally

        {

            AfterAsyncCall(button);

        }

        return resultModel;

    }

    static async Task BackgroundOperation<U>(Task<HttpResponseMessage> operation, ResultViewModel<U> resultModel)

    {

        HttpResponseMessage RawResult = await operation;

        var Response = await RawResult.Content.ReadAsStringAsync();

        resultModel.Status = RawResult.StatusCode;

        if (RawResult.IsSuccessStatusCode)

        {

            var responseObj = await Task.Run(() => JsonConvert.DeserializeObject<U>(Response));

            resultModel.Result = responseObj;

        }

        else

        {

            var responseErrorObj = await Task.Run(() => JsonConvert.DeserializeObject<ErrorModel>(Response));

            resultModel.Errors = new List<string>();

            foreach (var modelState in responseErrorObj.ModelState)

            {

                foreach (var error in modelState.Value)

                {

                    resultModel.Errors.Add(error.ToString());

                }

            }

        }

    }