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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
Download Patch File Download Diff File Expand all files Collapse all files
LehrerApp.Desktop/App.axaml.cs
+4
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@@ -1,6 +1,8 @@
using Avalonia;
using Avalonia.Controls.ApplicationLifetimes;
using Avalonia.Markup.Xaml;
using LehrerApp.Core.Services;
using LehrerApp.Desktop.Services;
using LehrerApp.Desktop.ViewModels;
using LehrerApp.Desktop.ViewModels.Groups;
using LehrerApp.Desktop.ViewModels.Students;
@@ -18,6 +20,8 @@ public class App : Application
public override void OnFrameworkInitializationCompleted()
{
Services = AppBootstrapper.BuildServices();
Services.GetRequiredService<AppLogger>().Info("Anwendung gestartet.");
GlobalExceptionHandler.AttachNotifications(Services.GetRequiredService<NotificationService>());
if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
{
LehrerApp.Desktop/AppBootstrapper.cs
+30 -5
View File
@@ -2,6 +2,7 @@ using LehrerApp.Core.Interfaces;
using LehrerApp.Core.Services;
using LehrerApp.Data;
using LehrerApp.Data.Repositories;
using LehrerApp.Desktop.Services;
using LehrerApp.Desktop.ViewModels;
using LehrerApp.Desktop.ViewModels.Groups;
using LehrerApp.Desktop.ViewModels.Settings;
@@ -24,20 +25,44 @@ public static class AppBootstrapper
public static string DbPath { get; private set; } = "";
public static string AppDataPath { get; private set; } = "";
/// <summary>
/// Vor der eigentlichen DI-Konfiguration verfügbar (z.B. für den globalen
/// Exception-Handler in Program.cs, der schon vor <see cref="BuildServices"/> greifen muss).
/// </summary>
public static AppLogger Logger { get; private set; } = null!;
public static string ResolveAppDataPath()
{
if (!string.IsNullOrEmpty(AppDataPath)) return AppDataPath;
var appData = Path.Combine(
Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData),
"LehrerApp");
Directory.CreateDirectory(appData);
AppDataPath = appData;
return appData;
}
public static AppLogger EnsureLogger()
{
Logger ??= new AppLogger(ResolveAppDataPath());
return Logger;
}
public static IServiceProvider BuildServices()
{
var services = new ServiceCollection();
// ── Pfade ─────────────────────────────────────────────────────────────
var appData = Path.Combine(
Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData),
"LehrerApp");
Directory.CreateDirectory(appData);
AppDataPath = appData;
var appData = ResolveAppDataPath();
DbPath = Path.Combine(appData, "lehrerapp.db");
var queuePath = Path.Combine(appData, "syncqueue.db");
var keyPath = Path.Combine(appData, "sync.key");
// ── Logging & Benachrichtigungen ─────────────────────────────────────────
EnsureLogger();
services.AddSingleton(Logger);
services.AddSingleton<NotificationService>();
// ── Datenbank ─────────────────────────────────────────────────────────
services.AddSingleton(_ => new LiteDbContext(DbPath));
LehrerApp.Desktop/Program.cs
+18 -2
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@@ -1,12 +1,28 @@
using Avalonia;
using LehrerApp.Desktop.Services;
namespace LehrerApp.Desktop;
class Program
{
[STAThread]
public static void Main(string[] args) =>
BuildAvaloniaApp().StartWithClassicDesktopLifetime(args);
public static void Main(string[] args)
{
var logger = AppBootstrapper.EnsureLogger();
GlobalExceptionHandler.Install(logger);
try
{
BuildAvaloniaApp().StartWithClassicDesktopLifetime(args);
}
catch (Exception ex)
{
// Fehler, die den Avalonia-Nachrichtenloop selbst verlassen (z.B. beim Start),
// laufen hier zusammen — protokollieren, bevor der Prozess unvermeidlich endet.
logger.Error("Unbehandelter Fehler hat die Anwendung beendet.", ex);
throw;
}
}
public static AppBuilder BuildAvaloniaApp() =>
AppBuilder.Configure<App>()
LehrerApp.Desktop/Services/GlobalExceptionHandler.cs
+55
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@@ -0,0 +1,55 @@
using Avalonia.Threading;
using LehrerApp.Core.Services;
namespace LehrerApp.Desktop.Services;
/// <summary>
/// Zentrale Exception-Behandlung (13.2.1): protokolliert jeden unerwarteten Fehler und zeigt
/// eine verständliche Meldung statt eines rohen Absturzes.
///
/// Reichweite ehrlich betrachtet: <see cref="Dispatcher"/>.UIThread.UnhandledException kann
/// Ausnahmen aus Befehlen/Ereignis-Handlern auf dem UI-Thread abfangen und die App am Leben
/// erhalten (Handled = true) — das deckt den weit überwiegenden Teil realer Abstürze in einer
/// Desktop-App ab. AppDomain.UnhandledException und TaskScheduler.UnobservedTaskException sind
/// Sicherheitsnetze für Fehler außerhalb des UI-Threads; die App kann eine "IsTerminating"-
/// Ausnahme dort nicht mehr verhindern, aber wenigstens vollständig protokollieren, bevor sie endet.
/// </summary>
public static class GlobalExceptionHandler
{
private static AppLogger? _logger;
private static NotificationService? _notifications;
public static void Install(AppLogger logger, NotificationService? notifications = null)
{
_logger = logger;
_notifications = notifications;
Dispatcher.UIThread.UnhandledException += OnDispatcherUnhandledException;
AppDomain.CurrentDomain.UnhandledException += OnAppDomainUnhandledException;
TaskScheduler.UnobservedTaskException += OnUnobservedTaskException;
}
/// Muss aufgerufen werden, sobald der DI-Container steht, damit spätere Fehler
/// (die vor dem Container auftreten könnten) noch als Toast sichtbar werden.
public static void AttachNotifications(NotificationService notifications) => _notifications = notifications;
private static void OnDispatcherUnhandledException(object? sender, DispatcherUnhandledExceptionEventArgs e)
{
_logger?.Error("Unbehandelter Fehler auf dem UI-Thread.", e.Exception);
_notifications?.ShowError("Es ist ein unerwarteter Fehler aufgetreten. Details wurden protokolliert.");
e.Handled = true; // App am Leben halten statt abzustürzen.
}
private static void OnAppDomainUnhandledException(object sender, UnhandledExceptionEventArgs e)
{
_logger?.Error(
$"Unbehandelter Fehler außerhalb des UI-Threads (IsTerminating={e.IsTerminating}).",
e.ExceptionObject as Exception);
}
private static void OnUnobservedTaskException(object? sender, UnobservedTaskExceptionEventArgs e)
{
_logger?.Error("Unbeobachtete Ausnahme in einem Hintergrund-Task.", e.Exception);
e.SetObserved(); // verhindert, dass die Ausnahme unbemerkt verschwindet.
}
}
LehrerApp.Desktop/Services/NotificationService.cs
+51
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@@ -0,0 +1,51 @@
using Avalonia.Threading;
using CommunityToolkit.Mvvm.ComponentModel;
using System.Collections.ObjectModel;
namespace LehrerApp.Desktop.Services;
public enum NotificationKind { Success, Error }
/// <summary>
/// Einheitliche Erfolgs-/Fehlermeldungen als Toast (13.2.3). Wird im MainWindow als
/// Overlay über der aktuellen Seite angezeigt und blendet sich nach kurzer Zeit selbst aus.
/// </summary>
public class NotificationService
{
public ObservableCollection<ToastItem> Toasts { get; } = [];
public void ShowSuccess(string message) => Show(message, NotificationKind.Success, TimeSpan.FromSeconds(3));
public void ShowError(string message) => Show(message, NotificationKind.Error, TimeSpan.FromSeconds(6));
private void Show(string message, NotificationKind kind, TimeSpan duration)
{
void AddAndScheduleRemoval()
{
var toast = new ToastItem(message, kind);
Toasts.Add(toast);
_ = RemoveAfter(toast, duration);
}
if (Dispatcher.UIThread.CheckAccess()) AddAndScheduleRemoval();
else Dispatcher.UIThread.Post(AddAndScheduleRemoval);
}
private async Task RemoveAfter(ToastItem toast, TimeSpan duration)
{
await Task.Delay(duration);
Toasts.Remove(toast);
}
}
public partial class ToastItem : ObservableObject
{
public string Message { get; }
public NotificationKind Kind { get; }
public bool IsError => Kind == NotificationKind.Error;
public ToastItem(string message, NotificationKind kind)
{
Message = message;
Kind = kind;
}
}
LehrerApp.Desktop/ViewModels/Groups/ExamViewModels.cs
+19 -10
View File
@@ -28,7 +28,9 @@ public partial class ExamDialogViewModel : ObservableObject
[ObservableProperty] private int? _examNumber;
[ObservableProperty] private string _notes = "";
[ObservableProperty] private string _returnedAtText = "";
[ObservableProperty] private string _validationMessage = "";
[ObservableProperty] private string _titleError = "";
[ObservableProperty] private string _dateTextError = "";
[ObservableProperty] private string _returnedAtTextError = "";
[ObservableProperty] private double _totalPoints;
[ObservableProperty] private bool _hasCompetencyCatalog;
[ObservableProperty] private bool _useWeighting;
@@ -264,27 +266,34 @@ public partial class ExamDialogViewModel : ObservableObject
[RelayCommand]
private void Save()
{
if (string.IsNullOrWhiteSpace(Title)) { ValidationMessage = "Titel erforderlich."; return; }
if (!DateOnly.TryParseExact(DateText, "dd.MM.yyyy", null, DateTimeStyles.None, out var date))
TitleError = ""; DateTextError = ""; ReturnedAtTextError = ""; GradingKeyValidation = "";
var valid = true;
if (string.IsNullOrWhiteSpace(Title)) { TitleError = "Titel erforderlich."; valid = false; }
DateOnly date = default;
if (!DateOnly.TryParseExact(DateText, "dd.MM.yyyy", null, DateTimeStyles.None, out date))
{
ValidationMessage = "Datum im Format TT.MM.JJJJ eingeben.";
return;
DateTextError = "Format TT.MM.JJJJ.";
valid = false;
}
DateOnly? returnedAt = null;
if (!string.IsNullOrWhiteSpace(ReturnedAtText))
{
if (!DateOnly.TryParseExact(ReturnedAtText, "dd.MM.yyyy", null, DateTimeStyles.None, out var r))
{
ValidationMessage = "Rückgabedatum im Format TT.MM.JJJJ eingeben.";
return;
ReturnedAtTextError = "Format TT.MM.JJJJ.";
valid = false;
}
returnedAt = r;
else returnedAt = r;
}
var gradingKey = BuildGradingKeyEntries();
var gradingKeyError = _grading.ValidateGradingKey(gradingKey);
if (gradingKeyError is not null) { GradingKeyValidation = gradingKeyError; return; }
GradingKeyValidation = "";
if (gradingKeyError is not null) { GradingKeyValidation = gradingKeyError; valid = false; }
if (!valid) return;
Result = _editingExam ?? new Exam { GroupId = _groupId };
Result.Title = Title.Trim();
LehrerApp.Desktop/ViewModels/Groups/GradeOverviewViewModels.cs
+13 -7
View File
@@ -315,11 +315,16 @@ public partial class StudentGradesDialogViewModel : ObservableObject
private void Save(GradeEditItem item)
{
if (string.IsNullOrWhiteSpace(item.Value)) { item.ValidationMessage = "Wert darf nicht leer sein."; return; }
item.ValueError = ""; item.DateTextError = "";
var valid = true;
if (string.IsNullOrWhiteSpace(item.Value)) { item.ValueError = "Wert darf nicht leer sein."; valid = false; }
if (!DateOnly.TryParseExact(item.DateText, "dd.MM.yyyy", null,
System.Globalization.DateTimeStyles.None, out _))
{ item.ValidationMessage = "Datum im Format TT.MM.JJJJ eingeben."; return; }
item.ValidationMessage = "";
{ item.DateTextError = "Format TT.MM.JJJJ."; valid = false; }
if (!valid) return;
var grade = item.ToModel();
_grades.Save(grade);
item.IsNew = false;
@@ -345,7 +350,8 @@ public partial class GradeEditItem : ObservableObject
[ObservableProperty] private string _dateText;
[ObservableProperty] private double _weight;
[ObservableProperty] private string? _note;
[ObservableProperty] private string _validationMessage = "";
[ObservableProperty] private string _valueError = "";
[ObservableProperty] private string _dateTextError = "";
// Für die ComboBox: deutsche Anzeige statt des rohen Enum-Namens.
public string CategoryName
@@ -405,7 +411,7 @@ public partial class CollectiveGradeDialogViewModel : ObservableObject
[ObservableProperty] private double _weight = 1.0;
[ObservableProperty] private string? _note;
[ObservableProperty] private string _statusMessage = "";
[ObservableProperty] private string _validationMessage = "";
[ObservableProperty] private string _dateTextError = "";
// Für die ComboBox: deutsche Anzeige statt des rohen Enum-Namens.
public string CategoryName
@@ -428,8 +434,8 @@ public partial class CollectiveGradeDialogViewModel : ObservableObject
{
if (!DateOnly.TryParseExact(DateText, "dd.MM.yyyy", null,
System.Globalization.DateTimeStyles.None, out var date))
{ ValidationMessage = "Datum im Format TT.MM.JJJJ eingeben."; return; }
ValidationMessage = "";
{ DateTextError = "Format TT.MM.JJJJ."; return; }
DateTextError = "";
var count = 0;
foreach (var row in Rows)
LehrerApp.Desktop/ViewModels/Groups/GroupViewModels.cs
+9 -3
View File
@@ -618,7 +618,8 @@ public partial class AddGroupDialogViewModel : ObservableObject
[ObservableProperty] private int? _hoursPerWeek;
[ObservableProperty] private bool _isOwnClass;
[ObservableProperty] private bool _isDifferentiated;
[ObservableProperty] private string _validationMessage = "";
[ObservableProperty] private string _nameError = "";
[ObservableProperty] private string _gradeLevelError = "";
public List<string> SchoolYears { get; }
public List<string> GradingOptions { get; } = ["Noten 1–6", "Punkte 0–15"];
@@ -662,8 +663,13 @@ public partial class AddGroupDialogViewModel : ObservableObject
[RelayCommand]
private void Save()
{
if (string.IsNullOrWhiteSpace(Name)) { ValidationMessage = "Bezeichnung erforderlich."; return; }
if (GradeLevel is < 1 or > 13) { ValidationMessage = "Klassenstufe 1–13."; return; }
NameError = ""; GradeLevelError = "";
var valid = true;
if (string.IsNullOrWhiteSpace(Name)) { NameError = "Bezeichnung erforderlich."; valid = false; }
if (GradeLevel is < 1 or > 13) { GradeLevelError = "Klassenstufe 1–13."; valid = false; }
if (!valid) return;
string? subjectName = !string.IsNullOrWhiteSpace(Subject) ? Subject.Trim() : null;
Guid? subjectId = null;
LehrerApp.Desktop/ViewModels/Groups/ParticipationViewModels.cs
+3 -2
View File
@@ -671,7 +671,7 @@ public partial class AddSessionDialogViewModel : ObservableObject
[ObservableProperty] private DateOnly _date = DateOnly.FromDateTime(DateTime.Today);
[ObservableProperty] private string _comment = "";
[ObservableProperty] private string _dateText = DateOnly.FromDateTime(DateTime.Today).ToString("dd.MM.yyyy");
[ObservableProperty] private string _validationMessage = "";
[ObservableProperty] private string _dateTextError = "";
public ParticipationSession? Result { get; private set; }
@@ -681,9 +681,10 @@ public partial class AddSessionDialogViewModel : ObservableObject
if (!DateOnly.TryParseExact(DateText, "dd.MM.yyyy", null,
System.Globalization.DateTimeStyles.None, out var date))
{
ValidationMessage = "Datum im Format TT.MM.JJJJ eingeben.";
DateTextError = "Format TT.MM.JJJJ.";
return;
}
DateTextError = "";
Result = new ParticipationSession { Date = date, Comment = Comment.Trim() };
}
}
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);
LehrerApp.Desktop/ViewModels/MainWindowViewModel.cs
+5 -1
View File
@@ -1,10 +1,12 @@
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using LehrerApp.Core.Services;
using LehrerApp.Desktop.Services;
using LehrerApp.Desktop.ViewModels.Groups;
using LehrerApp.Desktop.ViewModels.Settings;
using LehrerApp.Desktop.ViewModels.Students;
using Microsoft.Extensions.DependencyInjection;
using System.Collections.ObjectModel;
namespace LehrerApp.Desktop.ViewModels;
@@ -17,13 +19,15 @@ public partial class MainWindowViewModel : ObservableObject
[ObservableProperty] private string _currentSchoolYear = "";
public SyncStatusViewModel SyncStatus { get; }
public ObservableCollection<ToastItem> Toasts { get; }
public MainWindowViewModel(IServiceProvider services,
DashboardViewModel dashboard, SchoolYearService sy,
SyncStatusViewModel syncStatus)
SyncStatusViewModel syncStatus, NotificationService notifications)
{
_services = services;
SyncStatus = syncStatus;
Toasts = notifications.Toasts;
CurrentSchoolYear = sy.CurrentSchoolYear();
CurrentPage = dashboard;
}
LehrerApp.Desktop/ViewModels/Settings/SettingsViewModel.cs
+21 -15
View File
@@ -23,7 +23,7 @@ public partial class SettingsViewModel : ObservableObject
[ObservableProperty] private string _newName = "";
[ObservableProperty] private string _newShort = "";
[ObservableProperty] private string _validationMessage = "";
[ObservableProperty] private string _newNameError = "";
public ObservableCollection<SubjectListItem> Subjects { get; } = [];
@@ -41,7 +41,7 @@ public partial class SettingsViewModel : ObservableObject
[ObservableProperty] private string _newTemplateName = "";
[ObservableProperty] private string _newTemplateGradingSystemName = "Noten 1–6";
[ObservableProperty] private string _templateValidationMessage = "";
[ObservableProperty] private string _newTemplateNameError = "";
public List<string> GradingSystemOptions { get; } = ["Noten 1–6", "Punkte 0–15"];
public ObservableCollection<GradingKeyTemplateEditItem> GradingKeyTemplateList { get; } = [];
@@ -93,7 +93,7 @@ public partial class SettingsViewModel : ObservableObject
[RelayCommand]
private void AddGradingKeyTemplate()
{
if (string.IsNullOrWhiteSpace(NewTemplateName)) { TemplateValidationMessage = "Vorlagenname erforderlich."; return; }
if (string.IsNullOrWhiteSpace(NewTemplateName)) { NewTemplateNameError = "Vorlagenname erforderlich."; return; }
var system = NewTemplateGradingSystemName == "Punkte 0–15"
? GradingSystem.Points0To15 : GradingSystem.Grades1To6;
@@ -109,7 +109,7 @@ public partial class SettingsViewModel : ObservableObject
_gradingKeyTemplates.Save(template);
GradingKeyTemplateList.Add(new GradingKeyTemplateEditItem(template, _gradingKeyTemplates, _grading));
NewTemplateName = "";
TemplateValidationMessage = "";
NewTemplateNameError = "";
}
[RelayCommand]
@@ -132,17 +132,17 @@ public partial class SettingsViewModel : ObservableObject
[RelayCommand]
private void AddSubject()
{
if (string.IsNullOrWhiteSpace(NewName)) { ValidationMessage = "Name erforderlich."; return; }
if (string.IsNullOrWhiteSpace(NewName)) { NewNameError = "Name erforderlich."; return; }
try
{
_subjects.Save(new Subject { Name = NewName.Trim(), ShortName = NewShort.Trim() });
}
catch (InvalidOperationException ex)
{
ValidationMessage = ex.Message;
NewNameError = ex.Message;
return;
}
NewName = ""; NewShort = ""; ValidationMessage = "";
NewName = ""; NewShort = ""; NewNameError = "";
LoadSubjects();
}
@@ -156,10 +156,10 @@ public partial class SettingsViewModel : ObservableObject
}
catch (InvalidOperationException ex)
{
ValidationMessage = ex.Message;
NewNameError = ex.Message;
return;
}
ValidationMessage = "";
NewNameError = "";
if (CatalogSubject?.Id == item.Id) CatalogSubject = null;
LoadSubjects();
}
@@ -362,7 +362,8 @@ public partial class GradingKeyTemplateEditItem : ObservableObject
[ObservableProperty] private string _newGrade = "";
[ObservableProperty] private double _newMinPercent;
[ObservableProperty] private string _validation = "";
[ObservableProperty] private string _newGradeError = "";
[ObservableProperty] private string _newMinPercentError = "";
[ObservableProperty] private string _completenessWarning = "";
public ObservableCollection<GradingKeyEntryVm> Entries { get; } = [];
@@ -384,10 +385,15 @@ public partial class GradingKeyTemplateEditItem : ObservableObject
[RelayCommand]
private void AddEntry()
{
if (string.IsNullOrWhiteSpace(NewGrade)) { Validation = "Bezeichnung erforderlich."; return; }
if (NewMinPercent is < 0 or > 100) { Validation = "Prozentgrenze muss zwischen 0 und 100 liegen."; return; }
if (_template.Entries.Any(e => Math.Abs(e.MinPercent - NewMinPercent) < 0.0001))
{ Validation = "Diese Prozentgrenze existiert bereits."; return; }
NewGradeError = ""; NewMinPercentError = "";
var valid = true;
if (string.IsNullOrWhiteSpace(NewGrade)) { NewGradeError = "Bezeichnung erforderlich."; valid = false; }
if (NewMinPercent is < 0 or > 100) { NewMinPercentError = "Muss zwischen 0 und 100 liegen."; valid = false; }
else if (_template.Entries.Any(e => Math.Abs(e.MinPercent - NewMinPercent) < 0.0001))
{ NewMinPercentError = "Diese Prozentgrenze existiert bereits."; valid = false; }
if (!valid) return;
var entry = new GradingKeyEntry { Grade = NewGrade.Trim(), MinPercent = NewMinPercent };
_template.Entries.Add(entry);
@@ -396,7 +402,7 @@ public partial class GradingKeyTemplateEditItem : ObservableObject
Entries.Clear();
foreach (var e in _template.Entries) Entries.Add(new GradingKeyEntryVm(e, DeleteEntry));
NewGrade = ""; NewMinPercent = 0; Validation = "";
NewGrade = ""; NewMinPercent = 0;
RecomputeCompleteness();
}
LehrerApp.Desktop/ViewModels/Students/StudentViewModels.cs
+24 -11
View File
@@ -361,7 +361,9 @@ public partial class AddStudentDialogViewModel : ObservableObject
[ObservableProperty] private string _dateOfBirthText = "";
[ObservableProperty] private string _selectedGender = "";
[ObservableProperty] private string _notes = "";
[ObservableProperty] private string _validationMessage = "";
[ObservableProperty] private string _lastNameError = "";
[ObservableProperty] private string _firstNameError = "";
[ObservableProperty] private string _dateOfBirthError = "";
public List<string> GenderOptions { get; } = ["", "M – männlich", "W – weiblich", "D – divers"];
public List<string> RelationPresets { get; } = ["Schüler/in", "Mutter", "Vater", "Elternteil", "Erziehungsberechtigte/r", "Sonstige"];
@@ -380,8 +382,11 @@ public partial class AddStudentDialogViewModel : ObservableObject
[RelayCommand]
private void Save()
{
if (string.IsNullOrWhiteSpace(LastName)) { ValidationMessage = "Nachname erforderlich."; return; }
if (string.IsNullOrWhiteSpace(FirstName)) { ValidationMessage = "Vorname erforderlich."; return; }
LastNameError = ""; FirstNameError = ""; DateOfBirthError = "";
var valid = true;
if (string.IsNullOrWhiteSpace(LastName)) { LastNameError = "Nachname erforderlich."; valid = false; }
if (string.IsNullOrWhiteSpace(FirstName)) { FirstNameError = "Vorname erforderlich."; valid = false; }
DateOnly? dob = null;
if (!string.IsNullOrWhiteSpace(DateOfBirthText))
@@ -389,11 +394,13 @@ public partial class AddStudentDialogViewModel : ObservableObject
if (!DateOnly.TryParseExact(DateOfBirthText, "dd.MM.yyyy", null,
System.Globalization.DateTimeStyles.None, out var d))
{
ValidationMessage = "Geburtsdatum im Format TT.MM.JJJJ."; return;
DateOfBirthError = "Format TT.MM.JJJJ."; valid = false;
}
dob = d;
else dob = d;
}
if (!valid) return;
Result = new Student
{
FirstName = FirstName.Trim(),
@@ -456,7 +463,8 @@ public partial class ContactEditDialogViewModel : ObservableObject
[ObservableProperty] private string _invalidSinceText = "";
[ObservableProperty] private string _selectedInvalidReason = "";
[ObservableProperty] private string _invalidReasonDetails = "";
[ObservableProperty] private string _validationMessage = "";
[ObservableProperty] private string _nameError = "";
[ObservableProperty] private string _invalidSinceError = "";
public string DialogTitle => _source is null ? "Kontakt anlegen" : "Kontakt bearbeiten";
public List<string> RelationPresets { get; } =
@@ -494,10 +502,13 @@ public partial class ContactEditDialogViewModel : ObservableObject
[RelayCommand]
private void Save()
{
NameError = ""; InvalidSinceError = "";
var valid = true;
if (string.IsNullOrWhiteSpace(Name))
{
ValidationMessage = "Name erforderlich.";
return;
NameError = "Name erforderlich.";
valid = false;
}
DateOnly? invalidSince = null;
@@ -506,12 +517,14 @@ public partial class ContactEditDialogViewModel : ObservableObject
if (!DateOnly.TryParseExact(InvalidSinceText, "dd.MM.yyyy", null,
System.Globalization.DateTimeStyles.None, out var parsedDate))
{
ValidationMessage = "Ungültig seit im Format TT.MM.JJJJ angeben.";
return;
InvalidSinceError = "Format TT.MM.JJJJ.";
valid = false;
}
invalidSince = parsedDate;
else invalidSince = parsedDate;
}
if (!valid) return;
Result = new Contact
{
Id = _source?.Id ?? Guid.NewGuid(),
LehrerApp.Desktop/Views/Groups/AddGroupDialog.axaml
+4 -2
View File
@@ -23,6 +23,8 @@
<StackPanel Spacing="4">
<TextBlock Text="{Binding NameLabel}" FontSize="12" Opacity="0.7"/>
<TextBox Text="{Binding Name}" PlaceholderText="{Binding NameHint}"/>
<TextBlock Text="{Binding NameError}" Foreground="Red" FontSize="11"
IsVisible="{Binding NameError, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
</StackPanel>
<!-- Fach – AutoComplete aus bekannten Fächern; auch bei Klasse, da eine
@@ -41,6 +43,8 @@
<StackPanel Grid.Column="0" Spacing="4">
<TextBlock Text="Klassenstufe *" FontSize="12" Opacity="0.7"/>
<NumericUpDown Value="{Binding GradeLevel}" Minimum="1" Maximum="13" FormatString="0"/>
<TextBlock Text="{Binding GradeLevelError}" Foreground="Red" FontSize="11"
IsVisible="{Binding GradeLevelError, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
</StackPanel>
<StackPanel Grid.Column="2" Spacing="4">
<TextBlock Text="Schuljahr" FontSize="12" Opacity="0.7"/>
@@ -70,8 +74,6 @@
<CheckBox Content="Niveaudifferenzierung (E/G/Förder)" IsChecked="{Binding IsDifferentiated}"
ToolTip.Tip="Blendet im Schüler-Tab eine Niveau-Zuordnung je Schüler ein und erlaubt in Klausuren die Zuordnung zu einem Niveau."/>
<TextBlock Text="{Binding ValidationMessage}" Foreground="Red" FontSize="12"
IsVisible="{Binding ValidationMessage, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
</StackPanel>
<Grid Grid.Row="1" ColumnDefinitions="*,8,*" Margin="0,20,0,0">
LehrerApp.Desktop/Views/Groups/AddSessionDialog.axaml
+2 -3
View File
@@ -14,15 +14,14 @@
<StackPanel Spacing="4">
<TextBlock Text="Datum *" FontSize="12" Opacity="0.7"/>
<TextBox Text="{Binding DateText}" PlaceholderText="TT.MM.JJJJ" x:Name="DateBox"/>
<TextBlock Text="{Binding DateTextError}" Foreground="Red" FontSize="11"
IsVisible="{Binding DateTextError, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
</StackPanel>
<StackPanel Spacing="4">
<TextBlock Text="Kommentar (optional)" FontSize="12" Opacity="0.7"/>
<TextBox Text="{Binding Comment}" PlaceholderText="z. B. Stunde 12 – Säure-Base-Reaktion"/>
</StackPanel>
<TextBlock Text="{Binding ValidationMessage}" Foreground="Red" FontSize="12"
IsVisible="{Binding ValidationMessage, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
</StackPanel>
<Grid Grid.Row="1" ColumnDefinitions="*,8,*" Margin="0,20,0,0">
LehrerApp.Desktop/Views/Groups/CollectiveGradeDialog.axaml
+5 -3
View File
@@ -15,14 +15,16 @@
<Grid ColumnDefinitions="120,*,90" ColumnSpacing="6">
<ComboBox Grid.Column="0" ItemsSource="{x:Static vm:GradeCategoryDisplay.Options}"
SelectedItem="{Binding CategoryName}"/>
<TextBox Grid.Column="1" Text="{Binding DateText}" PlaceholderText="TT.MM.JJJJ"/>
<StackPanel Grid.Column="1" Spacing="2">
<TextBox Text="{Binding DateText}" PlaceholderText="TT.MM.JJJJ"/>
<TextBlock Text="{Binding DateTextError}" Foreground="Red" FontSize="11"
IsVisible="{Binding DateTextError, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
</StackPanel>
<NumericUpDown Grid.Column="2" Value="{Binding Weight}" Minimum="0" Maximum="10"
Increment="0.1" FormatString="0.#" ShowButtonSpinner="False"
ToolTip.Tip="Gewichtung"/>
</Grid>
<TextBox Text="{Binding Note}" PlaceholderText="Notiz (z.B. Hausaufgabenkontrolle)"/>
<TextBlock Text="{Binding ValidationMessage}" Foreground="Red" FontSize="12"
IsVisible="{Binding ValidationMessage, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
<TextBlock Text="Werte pro Schüler unten eintragen. Leere Felder werden nicht gespeichert."
FontSize="11" Opacity="0.5" TextWrapping="Wrap"/>
</StackPanel>
LehrerApp.Desktop/Views/Groups/ExamDialog.axaml
+6 -3
View File
@@ -19,6 +19,8 @@
<StackPanel Spacing="4">
<TextBlock Text="Titel *" FontSize="12" Opacity="0.7"/>
<TextBox Text="{Binding Title}" PlaceholderText="z.B. 1. Klausur Kinetik"/>
<TextBlock Text="{Binding TitleError}" Foreground="Red" FontSize="11"
IsVisible="{Binding TitleError, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
</StackPanel>
<StackPanel Spacing="4" IsVisible="{Binding IsDifferentiated}">
@@ -32,6 +34,8 @@
<StackPanel Grid.Column="0" Spacing="4">
<TextBlock Text="Datum *" FontSize="12" Opacity="0.7"/>
<TextBox Text="{Binding DateText}" PlaceholderText="TT.MM.JJJJ"/>
<TextBlock Text="{Binding DateTextError}" Foreground="Red" FontSize="11"
IsVisible="{Binding DateTextError, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
</StackPanel>
<StackPanel Grid.Column="2" Spacing="4">
<TextBlock Text="Klausurnummer" FontSize="12" Opacity="0.7"/>
@@ -41,6 +45,8 @@
<StackPanel Grid.Column="4" Spacing="4">
<TextBlock Text="Rückgabedatum" FontSize="12" Opacity="0.7"/>
<TextBox Text="{Binding ReturnedAtText}" PlaceholderText="TT.MM.JJJJ"/>
<TextBlock Text="{Binding ReturnedAtTextError}" Foreground="Red" FontSize="11"
IsVisible="{Binding ReturnedAtTextError, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
</StackPanel>
</Grid>
@@ -118,9 +124,6 @@
</ItemsControl.ItemTemplate>
</ItemsControl>
<TextBlock Text="{Binding ValidationMessage}" Foreground="Red" FontSize="12"
IsVisible="{Binding ValidationMessage, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
<Separator Margin="0,4"/>
<Grid ColumnDefinitions="*,Auto">
LehrerApp.Desktop/Views/Groups/ParticipationWizardDialog.axaml
+10 -4
View File
@@ -128,11 +128,17 @@
<StackPanel Spacing="6">
<TextBlock Text="Abschnitt abschließen" FontSize="12" FontWeight="SemiBold"/>
<Grid ColumnDefinitions="*,100" ColumnSpacing="6">
<TextBox Grid.Column="0" Text="{Binding NewSectionLabel}" PlaceholderText="Bezeichnung"/>
<TextBox Grid.Column="1" Text="{Binding NewSectionEndDateText}" PlaceholderText="TT.MM.JJJJ"/>
<StackPanel Grid.Column="0" Spacing="2">
<TextBox Text="{Binding NewSectionLabel}" PlaceholderText="Bezeichnung"/>
<TextBlock Text="{Binding NewSectionLabelError}" Foreground="Red" FontSize="11"
IsVisible="{Binding NewSectionLabelError, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
</StackPanel>
<StackPanel Grid.Column="1" Spacing="2">
<TextBox Text="{Binding NewSectionEndDateText}" PlaceholderText="TT.MM.JJJJ"/>
<TextBlock Text="{Binding NewSectionEndDateTextError}" Foreground="Red" FontSize="11"
IsVisible="{Binding NewSectionEndDateTextError, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
</StackPanel>
</Grid>
<TextBlock Text="{Binding SectionValidationMessage}" Foreground="Red" FontSize="11"
IsVisible="{Binding SectionValidationMessage, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
<Button Content="Abschnitt für alle Schüler abschließen" Command="{Binding CloseSectionCommand}"
HorizontalAlignment="Stretch"/>
</StackPanel>
LehrerApp.Desktop/Views/Groups/StudentGradesDialog.axaml
+10 -4
View File
@@ -24,15 +24,21 @@
<Grid ColumnDefinitions="120,*,90,90" ColumnSpacing="6">
<ComboBox Grid.Column="0" ItemsSource="{x:Static vm:GradeCategoryDisplay.Options}"
SelectedItem="{Binding CategoryName}"/>
<TextBox Grid.Column="1" Text="{Binding Value}" PlaceholderText="Wert (z.B. 2 oder 11)"/>
<TextBox Grid.Column="2" Text="{Binding DateText}" PlaceholderText="TT.MM.JJJJ"/>
<StackPanel Grid.Column="1" Spacing="2">
<TextBox Text="{Binding Value}" PlaceholderText="Wert (z.B. 2 oder 11)"/>
<TextBlock Text="{Binding ValueError}" Foreground="Red" FontSize="11"
IsVisible="{Binding ValueError, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
</StackPanel>
<StackPanel Grid.Column="2" Spacing="2">
<TextBox Text="{Binding DateText}" PlaceholderText="TT.MM.JJJJ"/>
<TextBlock Text="{Binding DateTextError}" Foreground="Red" FontSize="11"
IsVisible="{Binding DateTextError, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
</StackPanel>
<NumericUpDown Grid.Column="3" Value="{Binding Weight}" Minimum="0" Maximum="10"
Increment="0.1" FormatString="0.#" ShowButtonSpinner="False"
ToolTip.Tip="Gewichtung"/>
</Grid>
<TextBox Text="{Binding Note}" PlaceholderText="Notiz (optional)" FontSize="12"/>
<TextBlock Text="{Binding ValidationMessage}" Foreground="Red" FontSize="11"
IsVisible="{Binding ValidationMessage, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
<Grid ColumnDefinitions="*,Auto,Auto">
<TextBlock Grid.Column="0" Text="{Binding CreatedAtDisplay}" FontSize="11" Opacity="0.5"
VerticalAlignment="Center"/>
LehrerApp.Desktop/Views/MainWindow.axaml
+30
View File
@@ -9,12 +9,14 @@
xmlns:vs="clr-namespace:LehrerApp.Desktop.Views.Students"
xmlns:vset="clr-namespace:LehrerApp.Desktop.Views.Settings"
xmlns:vmset="clr-namespace:LehrerApp.Desktop.ViewModels.Settings"
xmlns:svc="clr-namespace:LehrerApp.Desktop.Services"
x:Class="LehrerApp.Desktop.Views.MainWindow"
x:DataType="vm:MainWindowViewModel"
Title="LehrerApp"
Width="1280" Height="800"
MinWidth="900" MinHeight="600">
<Panel>
<!--
Avalonia 12: DrawerPage ersetzt die selbstgebaute Sidebar.
DrawerBreakpointWidth="900" → Sidebar ab 900px dauerhaft sichtbar,
@@ -189,4 +191,32 @@
</DrawerPage.Drawer>
</DrawerPage>
<!-- Toast-Benachrichtigungen (13.2.3): schweben über der aktuellen Seite, unten rechts. -->
<ItemsControl ItemsSource="{Binding Toasts}"
HorizontalAlignment="Right" VerticalAlignment="Bottom"
Margin="0,0,20,20" IsHitTestVisible="False">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Spacing="8"/>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.Styles>
<Style Selector="Border.toast">
<Setter Property="Background" Value="#323232"/>
</Style>
<Style Selector="Border.toast.error">
<Setter Property="Background" Value="#B3261E"/>
</Style>
</ItemsControl.Styles>
<ItemsControl.ItemTemplate>
<DataTemplate x:DataType="svc:ToastItem">
<Border Classes="toast" Classes.error="{Binding IsError}"
CornerRadius="8" Padding="14,10" MaxWidth="360">
<TextBlock Text="{Binding Message}" Foreground="White" FontSize="13" TextWrapping="Wrap"/>
</Border>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</Panel>
</Window>
LehrerApp.Desktop/Views/Settings/GradingKeyTemplateDialog.axaml
+13 -8
View File
@@ -28,15 +28,20 @@
</ItemsControl.ItemTemplate>
</ItemsControl>
<TextBlock Text="{Binding Validation}" Foreground="Red" FontSize="11"
IsVisible="{Binding Validation, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
<Grid ColumnDefinitions="*,8,90,8,Auto">
<TextBox Grid.Column="0" Text="{Binding NewGrade}"
PlaceholderText="Note (z.B. 2 oder 11)" FontSize="12"/>
<NumericUpDown Grid.Column="2" Value="{Binding NewMinPercent}" Minimum="0" Maximum="100"
FormatString="0.##" ShowButtonSpinner="False" FontSize="12"
ToolTip.Tip="Mindest-Prozentgrenze"/>
<StackPanel Grid.Column="0" Spacing="2">
<TextBox Text="{Binding NewGrade}"
PlaceholderText="Note (z.B. 2 oder 11)" FontSize="12"/>
<TextBlock Text="{Binding NewGradeError}" Foreground="Red" FontSize="11"
IsVisible="{Binding NewGradeError, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
</StackPanel>
<StackPanel Grid.Column="2" Spacing="2">
<NumericUpDown Value="{Binding NewMinPercent}" Minimum="0" Maximum="100"
FormatString="0.##" ShowButtonSpinner="False" FontSize="12"
ToolTip.Tip="Mindest-Prozentgrenze"/>
<TextBlock Text="{Binding NewMinPercentError}" Foreground="Red" FontSize="11"
IsVisible="{Binding NewMinPercentError, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
</StackPanel>
<Button Grid.Column="4" Content="＋" Command="{Binding AddEntryCommand}"/>
</Grid>
</StackPanel>
LehrerApp.Desktop/Views/Settings/SettingsView.axaml
+4 -4
View File
@@ -47,8 +47,8 @@
<Button Grid.Column="4" Content="Hinzufügen"
Command="{Binding AddSubjectCommand}"/>
</Grid>
<TextBlock Text="{Binding ValidationMessage}" Foreground="Red" FontSize="12"
IsVisible="{Binding ValidationMessage, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
<TextBlock Text="{Binding NewNameError}" Foreground="Red" FontSize="12"
IsVisible="{Binding NewNameError, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
</StackPanel>
</Border>
@@ -213,8 +213,8 @@
<Button Grid.Column="4" Content="Anlegen"
Command="{Binding AddGradingKeyTemplateCommand}"/>
</Grid>
<TextBlock Text="{Binding TemplateValidationMessage}" Foreground="Red" FontSize="12"
IsVisible="{Binding TemplateValidationMessage, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
<TextBlock Text="{Binding NewTemplateNameError}" Foreground="Red" FontSize="12"
IsVisible="{Binding NewTemplateNameError, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
</StackPanel>
</Border>
LehrerApp.Desktop/Views/Students/AddStudentDialog.axaml
+6 -3
View File
@@ -19,10 +19,14 @@
<StackPanel Grid.Column="0" Spacing="4">
<TextBlock Text="Nachname *" FontSize="12" Opacity="0.7"/>
<TextBox Text="{Binding LastName}" PlaceholderText="Mustermann" x:Name="LastNameBox"/>
<TextBlock Text="{Binding LastNameError}" Foreground="Red" FontSize="11"
IsVisible="{Binding LastNameError, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
</StackPanel>
<StackPanel Grid.Column="2" Spacing="4">
<TextBlock Text="Vorname *" FontSize="12" Opacity="0.7"/>
<TextBox Text="{Binding FirstName}" PlaceholderText="Max"/>
<TextBlock Text="{Binding FirstNameError}" Foreground="Red" FontSize="11"
IsVisible="{Binding FirstNameError, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
</StackPanel>
</Grid>
@@ -31,6 +35,8 @@
<StackPanel Grid.Column="0" Spacing="4">
<TextBlock Text="Geburtsdatum" FontSize="12" Opacity="0.7"/>
<TextBox Text="{Binding DateOfBirthText}" PlaceholderText="TT.MM.JJJJ"/>
<TextBlock Text="{Binding DateOfBirthError}" Foreground="Red" FontSize="11"
IsVisible="{Binding DateOfBirthError, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
</StackPanel>
<StackPanel Grid.Column="2" Spacing="4">
<TextBlock Text="Geschlecht" FontSize="12" Opacity="0.7"/>
@@ -99,9 +105,6 @@
AcceptsReturn="True" Height="70" TextWrapping="Wrap"/>
</StackPanel>
<!-- Validierungsfehler -->
<TextBlock Text="{Binding ValidationMessage}" Foreground="Red" FontSize="12"
IsVisible="{Binding ValidationMessage, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
</StackPanel>
</ScrollViewer>
LehrerApp.Desktop/Views/Students/ContactEditDialog.axaml
+4 -2
View File
@@ -17,6 +17,8 @@
<StackPanel Grid.Column="0" Spacing="4">
<TextBlock Text="Name *" FontSize="12" Opacity="0.7"/>
<TextBox x:Name="NameBox" Text="{Binding Name}" PlaceholderText="Name"/>
<TextBlock Text="{Binding NameError}" Foreground="Red" FontSize="11"
IsVisible="{Binding NameError, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
</StackPanel>
<StackPanel Grid.Column="2" Spacing="4">
<TextBlock Text="Beziehung" FontSize="12" Opacity="0.7"/>
@@ -56,6 +58,8 @@
<StackPanel Grid.Column="0" Spacing="4">
<TextBlock Text="Ungültig seit *" FontSize="12" Opacity="0.7"/>
<TextBox Text="{Binding InvalidSinceText}" PlaceholderText="TT.MM.JJJJ"/>
<TextBlock Text="{Binding InvalidSinceError}" Foreground="Red" FontSize="11"
IsVisible="{Binding InvalidSinceError, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
</StackPanel>
<StackPanel Grid.Column="2" Spacing="4">
<TextBlock Text="Grund" FontSize="12" Opacity="0.7"/>
@@ -72,8 +76,6 @@
</StackPanel>
</StackPanel>
<TextBlock Text="{Binding ValidationMessage}" Foreground="Red" FontSize="12"
IsVisible="{Binding ValidationMessage, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
</StackPanel>
</ScrollViewer>