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Fehlerbehandlung, Logging und feldbezogene Validierung (Kapitel 13.2)

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Zentrale Exception-Behandlung (Dispatcher.UIThread.UnhandledException,
AppDomain, TaskScheduler) verhindert Abstürze und protokolliert Fehler
über AppLogger in eine rotierende Log-Datei im App-Datenverzeichnis.
Toast-Benachrichtigungen zeigen Erfolg/Fehler global an. Alle Dialoge
mit Formularfeldern zeigen Validierungsmeldungen jetzt direkt am
betroffenen Feld statt in einem Sammel-Label.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
This commit is contained in:
admin
2026-08-13 12:38:30 +02:00
co-authored by Claude Sonnet 5
parent 273f459119
commit db1afff7e4
27 changed files with 578 additions and 102 deletions
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LehrerApp.Desktop/ViewModels/Groups/ParticipationWizardViewModels.cs
+13 -6
View File
@@ -37,7 +37,8 @@ public partial class ParticipationWizardDialogViewModel : ObservableObject
[ObservableProperty] private string _progressText = "";
[ObservableProperty] private string _newSectionLabel = "";
[ObservableProperty] private string _newSectionEndDateText = DateOnly.FromDateTime(DateTime.Today).ToString("dd.MM.yyyy");
[ObservableProperty] private string _sectionValidationMessage = "";
[ObservableProperty] private string _newSectionLabelError = "";
[ObservableProperty] private string _newSectionEndDateTextError = "";
[ObservableProperty] private ParticipationPeriodOption _rollupPeriod;
[ObservableProperty] private string _rollupStatusMessage = "";
[ObservableProperty] private double _timelineZoom = 1.0;
@@ -322,13 +323,20 @@ public partial class ParticipationWizardDialogViewModel : ObservableObject
[RelayCommand]
private void CloseSection()
{
if (string.IsNullOrWhiteSpace(NewSectionLabel)) { SectionValidationMessage = "Bezeichnung erforderlich."; return; }
NewSectionLabelError = ""; NewSectionEndDateTextError = "";
var valid = true;
if (string.IsNullOrWhiteSpace(NewSectionLabel)) { NewSectionLabelError = "Bezeichnung erforderlich."; valid = false; }
DateOnly end = default;
if (!DateOnly.TryParseExact(NewSectionEndDateText, "dd.MM.yyyy", null,
DateTimeStyles.None, out var end))
{ SectionValidationMessage = "Datum im Format TT.MM.JJJJ eingeben."; return; }
DateTimeStyles.None, out end))
{ NewSectionEndDateTextError = "Format TT.MM.JJJJ."; valid = false; }
if (!valid) return;
var start = ComputeOpenStart();
if (end < start) { SectionValidationMessage = "Enddatum liegt vor Abschnittsbeginn."; return; }
if (end < start) { NewSectionEndDateTextError = "Enddatum liegt vor Abschnittsbeginn."; return; }
var section = new ParticipationSection { GroupId = _groupId, Label = NewSectionLabel.Trim(), StartDate = start, EndDate = end };
_sectionRepo.Save(section);
@@ -350,7 +358,6 @@ public partial class ParticipationWizardDialogViewModel : ObservableObject
});
}
SectionValidationMessage = "";
NewSectionLabel = $"Abschnitt {_sectionList.Count + 1}";
BuildTimeline(CurrentStudentId);
BuildSections(CurrentStudentId);