Daniel Pichler
76eb71946f
Add Exceptionhandler, AlertService JSON-Converter AppSettings via DI Reformat Code
88 lines
2.5 KiB
C#
88 lines
2.5 KiB
C#
using Jugenddienst_Stunden.ViewModels;
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using Jugenddienst_Stunden.Models;
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using CommunityToolkit.Maui.Core;
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using CommunityToolkit.Maui.Alerts;
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namespace Jugenddienst_Stunden.Views;
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/// <summary>
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/// Code-Behind für die Stunden-Übersicht
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/// </summary>
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public partial class StundenPage : ContentPage {
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/// <summary>
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/// CTOR (für Shell/XAML DataTemplate erforderlich)
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/// </summary>
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public StundenPage() : this(
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(Application.Current?.Handler?.MauiContext?.Services
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?? throw new InvalidOperationException("DI container ist nicht verfügbar."))
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.GetRequiredService<StundenViewModel>()) {
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}
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/// <summary>
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/// CTOR (DI)
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/// </summary>
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public StundenPage(StundenViewModel vm) {
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InitializeComponent();
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BindingContext = vm;
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vm.AlertEvent += Vm_AlertEvent;
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vm.InfoEvent += Vm_InfoEvent;
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// Navigation NICHT im CTOR ausführen (Shell/Navigation-Stack ist hier oft noch nicht ?ready?)
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// if (!CheckLogin()) {
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// NavigateToTargetPage();
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// }
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}
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private void Vm_AlertEvent(object? sender, string e) {
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MainThread.BeginInvokeOnMainThread(async () => { await DisplayAlert("Fehler:", e, "OK"); });
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}
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//private void Vm_InfoEvent(object? sender, string e) {
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// DisplayAlert("Information:", e, "OK");
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//}
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//private void Vm_InfoEvent(object? sender, string e) {
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// MainThread.BeginInvokeOnMainThread(async () => {
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// await DisplayAlert("Information:", e, "OK");
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// });
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//}
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private void Vm_InfoEvent(object? sender, string e) {
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MainThread.BeginInvokeOnMainThread(async () => {
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CancellationTokenSource cts = new CancellationTokenSource();
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ToastDuration duration = ToastDuration.Short;
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double fontSize = 16;
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var toast = Toast.Make(e, duration, fontSize);
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await toast.Show(cts.Token);
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});
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}
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/// <summary>
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/// Beim Laden der Seite den Titel setzen
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/// </summary>
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protected override async void OnAppearing() {
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base.OnAppearing();
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Title = Preferences.Default.Get("name", "Nicht") + " " + Preferences.Default.Get("surname", "eingeloggt");
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if (!CheckLogin()) {
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try {
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await NavigateToTargetPage();
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} catch (Exception ex) {
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await DisplayAlert("Fehler:", ex.Message, "OK");
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}
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}
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}
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private bool CheckLogin() {
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return Preferences.Default.Get("apiKey", "") != "";
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}
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// private async void NavigateToTargetPage() {
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// await Navigation.PushAsync(new LoginPage());
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// }
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private Task NavigateToTargetPage() {
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// Shell-Navigation statt Navigation.PushAsync
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// Voraussetzung: LoginPage-Route ist in AppShell registriert (Routing.RegisterRoute(...))
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return Shell.Current.GoToAsync(nameof(Views.LoginPage));
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}
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} |