在 Xamarin.Forms 中调用异步 GetDataFromServer 的位置？

调用GetDataFromServer方法的最佳位置在哪里？我的直觉和理由说它属于存储库，但我不知道在哪里调用它。我试图在构造函数中调用它，但效果不太好。它有一个异步方法的问题。

public class SQLiteRepository : ISQLiteRepository
    {
        private HttpClient _httpClient = new HttpClient();
        private readonly SQLiteAsyncConnection _efContext;

        public SQLiteRepository()
        {
            _efContext = DependencyService.Get<ISQLiteDb>().GetAsyncConnection();
            _efContext.CreateTableAsync<EfPartner>();
        }

        public async Task<IEnumerable<EfPartner>> GetAllPartnersAsync()
        {
            try
            {
                var partners = await _efContext.Table<EfPartner>().ToListAsync();
                return partners;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }


        public async Task GetDataFromServerAsync()
        {
            try
            {
                var partners = await GetPartnersFromServerAsync();
                var companies = await GetCompaniesFromServerAsync();

                await _efContext.InsertAllAsync(partners);
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        private async Task<IEnumerable<EfPartner>> GetPartnersFromServerAsync()
        {
            try
            {
                var jsonObject = await _httpClient.GetStringAsync(Constants.PartnersUrl);
                var dotNetObject = JsonConvert.DeserializeObject<List<EfPartner>>(jsonObject);

                return new List<EfPartner>(dotNetObject);
            }
            catch (Exception ex)
            {

                throw ex;
            }
        }
        private async Task<IEnumerable<EfCompany>> GetCompaniesFromServerAsync()
        {
            try
            {
                var jsonObject = await _httpClient.GetStringAsync(Constants.CompaniesUrl);
                var dotNetObject = JsonConvert.DeserializeObject<List<EfCompany>>(jsonObject);

                return new List<EfCompany>(dotNetObject);
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }
    }

我从 PartnersListPage.xaml.cs 调用了 GetDataFromServerAsync -> 感觉不对。
我很感激任何帮助。
谢谢你。

============================ 更新 ====================== ========
我正在开发的应用程序在 MasterDetailPage 中创建页面，如下所示：

private void MenuListView_ItemSelected(object sender, SelectedItemChangedEventArgs e)
    {
      if (e.SelectedItem == null)
        return;

      var menuItem = e.SelectedItem as EfMenuItem;

      if (menuItem == null)
        return;

      var page = (Page)Activator.CreateInstance(menuItem.TargetPage);
      page.Title = menuItem.Title;

      Detail = new NavigationPage(page);

      IsPresented = false;

      MdpMasterPage.MenuListView.SelectedItem = null;
    }

这是 PartnersListPage.xaml.cs，现在从哪里调用 GetDataFromServer：

public partial class PartnersListPage : ContentPage
    {
        private readonly SQLiteRepository _repo;

        public PartnersListPage()
        {
            InitializeComponent();

            _repo = new SQLiteRepository();            
        }

        protected override async void OnAppearing()
        {
            await _repo.GetDataFromServerAsync();
            var partners = await _repo.GetAllPartnersAsync();

            InitializeGrid(partners);

            base.OnAppearing();
        }