async Task RefreshData()
        {
            await onCallPhoneService.ReadFromFileAsync();

            DataItems.Clear();
            foreach (var item in onCallPhoneService.Items)
            {
                DataItems.Add(item);
            }
        }
        public async void OnNavigatedTo(INavigationParameters parameters)
        {
            #region 確認網路已經連線
            //if (await UtilityHelper.CanConnectRemoteHostService() == false)
            //{
            //    await dialogService.DisplayAlertAsync("警告", "無網路連線可用 或者 無法連線到遠端主機,請檢查網路狀態與主機服務是否可以使用", "確定");
            //    return;
            //}
            #endregion

            #region 讀取相關定義資料
            using (IProgressDialog fooIProgressDialog =
                       UserDialogs.Instance.Loading($"請稍後,更新資料中...",
                                                    null, null, true, MaskType.Clear))
            {
                await AppStatusHelper.ReadAndUpdateAppStatus(systemStatusService, appStatus);

                #region 取得 連絡電話本
                fooIProgressDialog.Title = "請稍後,取得 連絡電話本";
                await onCallPhoneService.ReadFromFileAsync();

                var fooResult = await onCallPhoneService.GetAsync();

                if (fooResult.Status == true)
                {
                    await onCallPhoneService.WriteToFileAsync();
                }
                #endregion

                #region 取得 請假假別
                fooIProgressDialog.Title = "請稍後,取得 請假假別";
                await leaveCategoryService.ReadFromFileAsync();

                fooResult = await leaveCategoryService.GetAsync();

                if (fooResult.Status == true)
                {
                    await leaveCategoryService.WriteToFileAsync();
                }
                #endregion

                #region 取得 專案清單
                fooIProgressDialog.Title = "請稍後,取得 專案清單";
                await projectService.ReadFromFileAsync();

                fooResult = await projectService.GetAsync();

                if (fooResult.Status == true)
                {
                    await projectService.WriteToFileAsync();
                }
                #endregion

                #region  傳例外異常
                fooIProgressDialog.Title = "請稍後,上傳例外異常";
                await appExceptionsService.ReadFromFileAsync();

                if (appExceptionsService.Items.Count > 0)
                {
                    await appExceptionsService.ReadFromFileAsync();

                    fooResult = await exceptionRecordsService.PostAsync(appExceptionsService.Items);

                    if (fooResult.Status == true)
                    {
                        appExceptionsService.Items.Clear();
                        await appExceptionsService.WriteToFileAsync();
                    }
                }
                #endregion
            }
            #endregion

            if (appStatus.SystemStatus.IsLogin == false)
            {
                // 使用者尚未成功登入,切換到登入頁面
                await navigationService.NavigateAsync("/LoginPage");

                return;
            }

            #region 使用者已經成功登入了,接下來要更新相關資料
            using (IProgressDialog fooIProgressDialog =
                       UserDialogs.Instance.Loading($"請稍後,更新資料中...",
                                                    null, null, true, MaskType.Clear))
            {
                #region 取得 使用者清單
                fooIProgressDialog.Title = "請稍後,取得 使用者清單";
                await myUserService.ReadFromFileAsync();

                var fooResult = await myUserService.GetAsync();

                if (fooResult.Status == true)
                {
                    await myUserService.WriteToFileAsync();
                }
                #endregion
            }

            // 使用者尚已經功登入,切換到首頁頁面
            await navigationService.NavigateAsync("/MDPage/NaviPage/HomePage");

            #endregion
        }