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CalendarDatePicker: DateTimeOffset<->DateTime-Konvertierung per Converter
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CalendarDatePicker.SelectedDate ist (WPF-Toolkit-Ursprung) DateTime?,
nicht DateTimeOffset? wie beim eingebauten DatePicker - Avalonia bietet
dafuer keine automatische Konvertierung. Ohne Converter blieb das Feld
leer und ein Klick auf einen Kalendertag warf eine InvalidCastException.
Betraf auch die schon bestehenden Bindings in WithdrawStudentDialog und
CreateLetterDialog, nur bislang unbemerkt.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
This commit is contained in:
admin
2026-09-01 20:09:08 +02:00
co-authored by Claude Sonnet 5
parent 09e97efb61
commit fb7a015b42
9 changed files with 58 additions and 21 deletions
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LehrerApp.Desktop/Views/ClassTeacher/ClassTeacherAbsencesView.axaml
+3 -2
View File
@@ -1,6 +1,7 @@
<UserControl xmlns="https://github.com/avaloniaui"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:vm="clr-namespace:LehrerApp.Desktop.ViewModels.ClassTeacher"
xmlns:conv="clr-namespace:LehrerApp.Desktop.Converters"
x:Class="LehrerApp.Desktop.Views.ClassTeacher.ClassTeacherAbsencesView"
x:DataType="vm:ClassTeacherDetailsViewModel">
@@ -45,9 +46,9 @@
<ComboBoxItem Content="Heute"/><ComboBoxItem Content="Letzte 7 Tage"/><ComboBoxItem Content="Letzte 30 Tage"/>
</ComboBox>
<TextBlock Grid.Column="1" Text="von" VerticalAlignment="Center" Opacity="0.6"/>
<CalendarDatePicker Grid.Column="2" SelectedDate="{Binding StartDate}" HorizontalAlignment="Stretch"/>
<CalendarDatePicker Grid.Column="2" SelectedDate="{Binding StartDate, Converter={x:Static conv:DateTimeOffsetToDateTimeConverter.Instance}}" HorizontalAlignment="Stretch"/>
<TextBlock Grid.Column="3" Text="bis" VerticalAlignment="Center" Opacity="0.6"/>
<CalendarDatePicker Grid.Column="4" SelectedDate="{Binding EndDate}" HorizontalAlignment="Stretch"/>
<CalendarDatePicker Grid.Column="4" SelectedDate="{Binding EndDate, Converter={x:Static conv:DateTimeOffsetToDateTimeConverter.Instance}}" HorizontalAlignment="Stretch"/>
</Grid>
<Grid Grid.Row="1" ColumnDefinitions="*,Auto,Auto" ColumnSpacing="8">
<TextBox Grid.Column="0" Text="{Binding StudentFilter, Mode=TwoWay}" PlaceholderText="Schüler*in filtern…"/>