排序与enum的ObservableCollection绑定的组合框项

本文关键字:组合 绑定 ObservableCollection enum 排序 | 更新日期: 2023-09-27 18:07:13

我有一个简单的组合框:

<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>

绑定:

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

其中'ElementTypes'是枚举,集合中填充了所有枚举值。例子:

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

我只是想排序我的组合框项。

我试着:

1)第一个解:
 elementTypesComboBox.Items.SortDescriptions.Add(new SortDescription("Name", ListSortDirection.Ascending)); 
 elementTypesComboBox.Items.SortDescriptions.Add(new SortDescription("Content", ListSortDirection.Ascending));

2)二次解

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

这些都不起作用。我做错了什么?

排序与enum的ObservableCollection绑定的组合框项

使用OrderBy()中的ToString()按字母顺序对ComboBox项进行排序:

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

您可以对任何预定义的ElementTypes子集进行相同的排序:

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