Fehlerbehandlung, Logging und feldbezogene Validierung (Kapitel 13.2)

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>
2026-08-13 12:38:30 +02:00
parent 273f459119
commit db1afff7e4
27 changed files with 578 additions and 102 deletions
@@ -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">
@@ -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">
@@ -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>
@@ -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">
@@ -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>
@@ -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"/>