I want to refresh my UWP-UI periodically after like 5 minutes. I have a Method "Page_Loaded" where all information from the classes is sent to the UI-Elements. So if i refresh this method, the UI would do too, right?
The Code is like this:
private async void Page_Loaded(object sender, RoutedEventArgs e)
{
RootObject myWeather = await Openweathermap.GetWeather();
string icon = String.Format("http://openweathermap.org/img/wn/{0}@2x.png", myWeather.weather[0].icon);
ResultImage.Source = new BitmapImage(new Uri(icon, UriKind.Absolute));
TempTextBlock.Text = ((int)myWeather.main.temp).ToString() + "°";
DescriptionTextBlock.Text = myWeather.weather[0].description;
LocationTextBlock.Text = myWeather.name;
var articlesList = NewsAPI.GetNews().Result.articles;
lvNews.ItemsSource = articlesList;
Welcometxt.Text = MainPage.WelcomeText();
}
So, how do I refresh this method after 5 Minutes, so that it gets the new information and sends it to the UI?
So, how do I refresh this method after 5 Minutes, so that it gets the new information and sends it to the UI?
Repeatedly calling the Page_Loaded method is not a recommended practice, the recommended approach is to use DispatcherTimer, a timer within the UI thread.
We can extract the code inside Page_Loaded as a function.
private DispatcherTimer _timer;
public MainPage()
{
this.InitializeComponent();
_timer = new DispatcherTimer();
_timer.Interval = TimeSpan.FromMinutes(5);
_timer.Tick += Timer_Tick;
}
private async Task GetData()
{
RootObject myWeather = await Openweathermap.GetWeather();
string icon = String.Format("http://openweathermap.org/img/wn/{0}@2x.png", myWeather.weather[0].icon);
ResultImage.Source = new BitmapImage(new Uri(icon, UriKind.Absolute));
TempTextBlock.Text = ((int)myWeather.main.temp).ToString() + "°";
DescriptionTextBlock.Text = myWeather.weather[0].description;
LocationTextBlock.Text = myWeather.name;
var articlesList = NewsAPI.GetNews().Result.articles;
lvNews.ItemsSource = articlesList;
Welcometxt.Text = MainPage.WelcomeText();
}
private async void Timer_Tick(object sender, object e)
{
await GetData();
}
private async void Page_Loaded(object sender, RoutedEventArgs e)
{
await GetData();
_timer.Start();
}
protected override void OnNavigatedFrom(NavigationEventArgs e)
{
_timer.Stop();
base.OnNavigatedFrom(e);
}
With DispatcherTimer.Tick, we can execute tasks regularly, and when we leave the page, we can stop the timer.
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