private void GenresEditButton_Click(object sender, RoutedEventArgs e)
{
var show = DataContext as Show;
if (show == null) return;
var dlg = new GenrePicker();
dlg.SelectedGenreIds = show.ShowGenres
.Where(o => o.IsMarkedForDeletion == false)
.Select(o => o.GenreId).ToList();
if (dlg.ShowDialog() == true)
{
var selectedGenreIds = dlg.SelectedGenreIds;
foreach (var sgid in selectedGenreIds)
{
var showGenre = show.ShowGenres.Where(o => o.GenreId == sgid).FirstOrDefault();
if (showGenre == null)
{
show.ShowGenres.Add(new ShowGenre { GenreId = sgid });
}
else
{
showGenre.IsMarkedForDeletion = false;
}
}
var showGenresToDelete = show.ShowGenres.Where(o => !selectedGenreIds.Contains(o.GenreId));
foreach (var sg in showGenresToDelete)
{
sg.IsMarkedForDeletion = true;
}
// Force an update to the GenresTextBox binding
// This is necessary because the TextBox does not listen for
// INotifyCollectionChanged events.
BindingOperations.GetBindingExpression(GenresTextBox, TextBox.TextProperty)
.UpdateTarget();
}
}
private void GenresEditButton_Click(object sender, RoutedEventArgs e)
{
var vm = DataContext as ShowsViewModel;
if (vm == null)
{
return;
}
var show = vm.SelectedItem as Show;
var dlg = new GenrePicker();
dlg.SelectedGenreIds = show.ShowGenres
.Where(o => o.IsMarkedForDeletion == false)
.Select(o => o.GenreId).ToList();
if (dlg.ShowDialog() == true)
{
var hasChanges = false;
var selectedGenreIds = dlg.SelectedGenreIds;
foreach (var sgid in selectedGenreIds)
{
var showGenre = show.ShowGenres.Where(o =>
o.GenreId == sgid).FirstOrDefault();
if (showGenre == null)
{
show.ShowGenres.Add(new ShowGenre {
GenreId = sgid
});
hasChanges = true;
}
else
{
showGenre.IsMarkedForDeletion = false;
}
}
var showGenresToDelete = show.ShowGenres.Where(o =>
!selectedGenreIds.Contains(o.GenreId));
foreach (var sg in showGenresToDelete)
{
sg.IsMarkedForDeletion = true;
hasChanges = true;
}
// Force an update to the GenresTextBox binding
// This is necessary because the TextBox does not listen for
// INotifyCollectionChanged events.
BindingOperations.GetBindingExpression(GenresTextBox, TextBox.TextProperty)
.UpdateTarget();
if (hasChanges)
{
((DomainViewModel <Show>)DataContext).SelectedItem.IsDirty = true;
}
}
}