CODEWITHSUNDEEP
c#wpfsortingcomboboxobservablecollection
Milos
Milos

Reputation: 1838

Sort Combobox items binded with ObservableCollection of enum

I have simple combobox:

<ComboBox Grid.Row="0" Grid.Column="1" x:Name="elementTypesComboBox" SelectedValue="{Binding Path=NVP.ElementType, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" HorizontalAlignment="Stretch" SelectionChanged="ComboBox_SelectionChanged" IsEnabled="{Binding Path=NVP.CEB, Converter={StaticResource CanAddNewElementConverter}, FallbackValue=false}">
        <ComboBox.ItemTemplate>
            <DataTemplate>
                <TextBlock VerticalAlignment="Center" Text="{Binding Path=., Mode=OneWay, Converter={StaticResource ElementTypeToStringConverter}}" />
            </DataTemplate>
        </ComboBox.ItemTemplate>
</ComboBox>

binded with:

     ObservableCollection<ElementTypes> elementTypes = new ObservableCollection<ElementTypes>();

where 'ElementTypes' is enum and collection is filled with all enum values. Example:

public enum ElementTypes
{
    E2, 
    E5,
    E6,
    E1
}

I just wanna sort my combobox items.

I tried:

1) First sollution:

 elementTypesComboBox.Items.SortDescriptions.Add(new SortDescription("Name", ListSortDirection.Ascending)); 

 elementTypesComboBox.Items.SortDescriptions.Add(new SortDescription("Content", ListSortDirection.Ascending));

2) Secund sollution

elementTypes = new ObservableCollection<UndrawnElementTypes>(elementTypes.OrderBy(i => i));
elementTypesComboBox.ItemsSource = elementTypes;

None of this does not work. What I am doing wrong ?

Upvotes: 0

Views: 1321

Answers (1)

Clemens
Clemens

Reputation: 128061

Use ToString() in OrderBy() to sort the ComboBox items alphabetically:

elementTypesComboBox.ItemsSource = Enum.GetValues(typeof(ElementTypes))
    .Cast<ElementTypes>()
    .OrderBy(e => e.ToString())
    .ToList();

You may sort any predefined subset of ElementTypes the same way:

IEnumerable<ElementTypes> elements = ...

elementTypesComboBox.ItemsSource = elements
    .OrderBy(e => e.ToString())
    .ToList();

Upvotes: 3

Related Questions