Question

情况就是这样：

我有一系列藏品！

我有2个列表框！

ListBox A包含我的集合集合，因为它是itemsource并支持多项选择（SelectionMode = Extended）

ListBox B需要从ListBox A中选择的所有集合的合成中获取它的itemsource。

有没有好办法呢？

数据结构如下

TestContainers []。TestEntries []

如果测试容器A＆amp;选择C然后列表框B包含容器A和容器A中的所有TestEntries。 ç

我希望这很清楚？

Answer 1

要链接两个列表框之间的数据，请使用以下XAML将所选项目从一个列表框引用到另一个列表框：

注意：我使用ViewModel绑定到ObservableCollection;我在下面提供了大部分代码，以便在需要时重新构建此代码。

<Window x:Class="TwoListBoxesSameData.Views.MainView"
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  Title="Main Window" Height="400" Width="800">
  <Window.Resources>
    <DataTemplate x:Key="ListBoxTemplate">
        <TextBlock>
           <TextBlock Text="{Binding Path=ContainerName}" />
        </TextBlock>
    </DataTemplate>
    <DataTemplate x:Key="ListBoxTemplate2" >
        <TextBlock>
           <TextBlock Text="{Binding Path=TestEntries[0].EntryName}" />
        </TextBlock>
    </DataTemplate>
  </Window.Resources>
  <DockPanel>
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition/>
            <RowDefinition/>
        </Grid.RowDefinitions>
        <ListBox Grid.Row="0" 
                 x:Name="lb"
                 ItemsSource="{Binding Path=TestContainers}"
                 ItemTemplate="{Binding Source={StaticResource ListBoxTemplate}}"
                 SelectionMode="Extended">
        </ListBox>
        <ListBox Grid.Row="1" 
                 ItemsSource="{Binding ElementName=lb, Path=SelectedItems}"
                 ItemTemplate="{Binding Source={StaticResource ListBoxTemplate2}}" >
        </ListBox>
    </Grid>
  </DockPanel>
</Window>

以下是ViewModel，其中包含初始化集合的代码：

public class MainViewModel : ViewModelBase
{
  public MainViewModel()
  {
     {
        TestContainer tc1 = new TestContainer();
        tc1.ContainerName = "Container 1";

        TestEntry te1 = new TestEntry();
        te1.EntryName = "Search for Names";
        tc1.TestEntries.Add(te1);

        TestEntry te2 = new TestEntry();
        te2.EntryName = "Search for People";

        tc1.TestEntries.Add(te2);
        TestEntry te3 = new TestEntry();
        te3.EntryName = "Search for Things";
        tc1.TestEntries.Add(te3);

        _testContainers.Add(tc1);
     }
     {
        TestContainer tc2 = new TestContainer();
        tc2.ContainerName = "Container 2";

        TestEntry te1 = new TestEntry();
        te1.EntryName = "Look for Names";
        tc2.TestEntries.Add(te1);

        TestEntry te2 = new TestEntry();
        te2.EntryName = "Look for People";
        tc2.TestEntries.Add(te2);

        TestEntry te3 = new TestEntry();
        te3.EntryName = "Look for Things";
        tc2.TestEntries.Add(te3);

        _testContainers.Add(tc2);
     }
     {
        TestContainer tc3 = new TestContainer();
        tc3.ContainerName = "Container 3";

        TestEntry te1 = new TestEntry();
        te1.EntryName = "Find Names";
        tc3.TestEntries.Add(te1);

        TestEntry te2 = new TestEntry();
        te2.EntryName = "Find People";
        tc3.TestEntries.Add(te2);

        TestEntry te3 = new TestEntry();
        te3.EntryName = "Fine Things";
        tc3.TestEntries.Add(te3);

        _testContainers.Add(tc3);
     }
  }

  private ObservableCollection<TestContainer> _testContainers = new ObservableCollection<TestContainer>();
  public ObservableCollection<TestContainer> TestContainers
  {
     get
     {
        return _testContainers;
     }
     set
     {
        _testContainers = value;
     }
  }
}

这是TestContainer：

public class TestContainer
{
  public string ContainerName { get; set; }

  private ObservableCollection<TestEntry> _testEntries = new ObservableCollection<TestEntry>();
  public ObservableCollection<TestEntry> TestEntries
  {
     get
     {
        return _testEntries;
     }
     set
     {
        _testEntries = value;
     }
  }
}

这是TestEntry：

public class TestEntry
{
   public string EntryName { get; set; }
}

这里是我初始化ViewModel的视图：

public partial class MainView : Window
{
  public MainView()
  {
     InitializeComponent();

     this.DataContext = new ViewModels.MainViewModel();
  }
}

Answer 2

CompositeCollection班怎么样？

WPF多选ListBox和复合项源绑定

2 个答案: