小编sme*_*fie的帖子

我想知道使用relay命令调用刷新屏幕的函数有什么好处。在我的应用程序中，我有以下中继命令设置。

private RelayCommand _refreshSitesCommand;
    public RelayCommand RefreshSitesCommand
    {
        get { return _refreshSitesCommand ?? (_refreshSitesCommand = new RelayCommand(RefreshSites)); }
    }

    private RelayCommand _refreshProvidersCommand;
    public RelayCommand RefreshProvidersCommand
    {
        get { return _refreshProvidersCommand ?? (_refreshProvidersCommand = new RelayCommand(RefreshProviders)); }
    }

    private async void RefreshSites()
    {
        var sitesStats = await _dataService.GetSiteStats();

        if (sitesStats != null)
        {
            SiteStats.Clear();

            foreach (var site in sitesStats)
            {
                SiteStats.Add(new SiteStatsViewModel(site));
            }

            SelectedSite = SiteStats[0];
        }
    }

    private async void RefreshProviders()
    {
        var providers = await _dataService.GetProviders();

        if (providers != …