wpf - 寻找带有复选框的 WPF ComboBox

Question

我的谷歌技能让我失望。任何人都听说过类似 WPF 的控件。我试图让它看起来像这样(winforms screenshot)。

Answer 1

有我的组合框。我使用 Martin Harris 代码和来自此链接的代码 Can a WPF ComboBox display alternative text when its selection is null?

<ComboBox Name="cbObjects" Grid.Column="1" Grid.Row="1" VerticalAlignment="Center" Margin="2,2,6,0" SelectionChanged="OnCbObjectsSelectionChanged" >
    <ComboBox.ItemTemplate>
        <DataTemplate>
            <StackPanel Orientation="Horizontal">
                <CheckBox IsChecked="{Binding IsSelected}" Width="20" VerticalAlignment="Center" Checked="OnCbObjectCheckBoxChecked" Unchecked="OnCbObjectCheckBoxChecked" />
                <TextBlock Text="{Binding ObjectData}" VerticalAlignment="Center" />
            </StackPanel>
        </DataTemplate>
    </ComboBox.ItemTemplate>
</ComboBox>
<TextBlock IsHitTestVisible="False" Name="tbObjects" Text="Выберите объекты..." Grid.Column="1" Grid.Row="1" VerticalAlignment="Center" Margin="6,2,6,0" />

数据源小类:

public class SelectableObject <T> {
    public bool IsSelected { get; set; }
    public T ObjectData { get; set; }

    public SelectableObject(T objectData) {
        ObjectData = objectData;
    }

    public SelectableObject(T objectData, bool isSelected) {
        IsSelected = isSelected;
        ObjectData = objectData;
    }
}

并且有两个处理程序 - 一个用于处理单击的 CheckBox，一个用于为 ComboBox 形成文本。

private void OnCbObjectCheckBoxChecked(object sender, RoutedEventArgs e) {
    StringBuilder sb = new StringBuilder();
    foreach (SelectableObject<tblObject> cbObject in cbObjects.Items) 
    {
        if (cbObject.IsSelected)
            sb.AppendFormat("{0}, ", cbObject.ObjectData.Description);
    }
    tbObjects.Text = sb.ToString().Trim().TrimEnd(',');
}

private void OnCbObjectsSelectionChanged(object sender, SelectionChangedEventArgs e) {
    ComboBox comboBox = (ComboBox)sender;
    comboBox.SelectedItem = null;
}

对于 ComboBox.ItemsSource 我使用

ObservableCollection<SelectableObject<tblObject>> 

其中 tblObject 是我的对象的类型，我想在 ComboBox 中显示它的列表。

我希望这段代码对某人有用!