wpf - wpf 中包含静态和动态数据的组合框

Question

如标题所示，我想向 dataBound ComboBox 添加一个静态项。

我引用了 this发布。

数据绑定(bind)组合框:

<ComboBox Name="comboBox1" Width="Auto" ItemsSource="{Binding}" />

将静态项添加到组合框:

<ComboBox Text="Is not open"> 
  <ComboBoxItem Name="cbi1">Item1</ComboBoxItem>
  <ComboBoxItem Name="cbi2">Item2</ComboBoxItem>     
  <ComboBoxItem Name="cbi3">Item3</ComboBoxItem> 
</ComboBox> 

使用 CompositeCollection 一起做上面的事情:

<ComboBox>
    <ComboBox.Items>
        <CompositeCollection>
            <CollectionContainer Collection="{Binding Source={...whatever...}" />
            <ComboBoxItem Name="cbi1">Item1</ComboBoxItem>
            <ComboBoxItem Name="cbi2">Item2</ComboBoxItem>
            <ComboBoxItem Name="cbi3">Item3</ComboBoxItem>
        </CompositeCollection>
    </ComboBox.Items>
</ComboBox>

但是上面的例子并没有解决我的问题。

我想将静态项目添加到 dataBound ComboBox 我在其中使用 DataTemplate

这是我的 dataBound ComboBox 代码(我不知道如何添加静态项):

<ComboBox x:Name="cbUnder" ItemsSource="{Binding GroupsAndCorrespondingEffects}"
            IsEditable="True" SelectedItem="{Binding SelectedGroup, Mode=TwoWay}"
            TextSearch.TextPath="GroupName" Grid.Column="1" Grid.ColumnSpan="4" Grid.Row="3">
            <ComboBox.ItemTemplate>
                <DataTemplate>
                    <VirtualizingStackPanel Orientation="Horizontal">
                        <TextBlock Text="{Binding GroupName}" Width="250"/>
                        <TextBlock Text="{Binding CorrespondingEffect}" />
                    </VirtualizingStackPanel>
                </DataTemplate>
            </ComboBox.ItemTemplate>
        </ComboBox>

根据 aks81 的要求更新:

这是 GroupsAndCorrespondingEffects 的代码

public GroupsViewModel()
{
    using (DBEntities db = new DBEntities())
    {
        GroupsAndCorrespondingEffects = (from g in db.Groups
                                         select new GroupAndCorrespondingEffect
                                                    {
                                                        GroupName = g.Name,
                                                        CorrespondingEffect = g.Type_Effect.Name
                                                    }
                                        ).ToList().OrderBy(g => g.GroupName);

        Items = (from e in db.Type_Effect
                 select e.Name).ToList();
    }
}

public static GroupsViewModel CurrentInstance { get { return Instance; } }

private IEnumerable<GroupAndCorrespondingEffect> _groupsAndCorrespondingEffects;
public IEnumerable<GroupAndCorrespondingEffect> GroupsAndCorrespondingEffects
{
    get
    {
        return _groupsAndCorrespondingEffects;
    }
    set
    {
        _groupsAndCorrespondingEffects = value;
        OnPropertyChanged("GroupsAndCorrespondingEffects");
    }
}

Answer 1

查看此链接，让我知道它是否有用:)

http://social.msdn.microsoft.com/Forums/vstudio/en-US/86229c53-15bd-4780-bee3-c6c2cdae81e7/select-multiple-checkboxes-placed-inside-a-combobox

祝你有美好的一天!