Question

我不了解有关绑定的内容。我有一个DataTemplate类型的Object正在工作，但在那里我想创建另一个ListBox并将数据设置为Object的一个属性的数据。我一直在使用Snoop查看数据上下文，对象ListBox中的DataTemplate的数据上下文是一个对象，但ItemsSource和ItemsSource={Binding componentList, Mode=TwoWay}出错了我不知道为什么。我正在做ObservableList而一个Object有一个componentList，而componentList是一个<Window.Resources> <DataTemplate DataType="{x:Type properties:Component}"> <StackPanel> <TextBlock Text="TEST COMPONENT" /> <ListBox DataContext="{Binding propertyList}" ItemsSource="{Binding propertyList}" /> </StackPanel> </DataTemplate> <DataTemplate DataType="{x:Type properties:Object}"> <StackPanel> <TextBlock Text="TEST OBJECT" /> <ListBox ItemsSource="{Binding componentList, Mode=TwoWay}" /> </StackPanel> </DataTemplate> </Window.Resources>。我错过了什么？

这是我的XAML代码：

public class Component
{
  public string name;
  public ObservableCollection<IProperty> propertyList;
}

public class Object
{
  public UnsignedProperty objectID;
  public ObservableCollection<Component> componentList;
}

我的C＃代码：

ListBox

我在代码中制作了ItemsSource并将其DataTemplate设置为对象列表，并且看到了我的对象ListBox properties = new ListBox(); ObservableCollection<Properties.Object> t = new ObservableCollection<Properties.Object>(); t.Add(selectedObject); //potentially more objects properties.ItemsSource = t; PropertyPane.Content = properties;，但是＆＃39;停止的地方

{{1}}

任何帮助将不胜感激。谢谢！

Answer 1

除了我上面的评论：

您不必在代码中创建ListBox，在XAML中创建它并将集合绑定到您的ItemsSource（依赖属性）。

像这样：

C＃：

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
        this.DataContext = this;

        Components.Add(new Object());
        Components.Add(new Object());
    }

    private ObservableCollection<Object> components;
    public ObservableCollection<Object> Components
    {
        get
        {
            if (components == null)
                components = new ObservableCollection<Object>();
            return components;
        }
    }
}

XAML：

<Window>   
   <Grid>
      <ListBox  ItemsSource="{Binding Components, Mode=OneWay}" />        
   </Grid>        
</Window>

此外，这是您的代码的延续：

C＃：

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
        this.DataContext = this;

        ListBox properties = new ListBox();
        ObservableCollection<Object> t = new ObservableCollection<Object>();
        t.Add(new Object()); //potentially more objects
        properties.ItemsSource = t;
        PropertyPane.Content = properties;
    }        
}

public interface IProperty
{
}

public class Component
{
    public string name;

    private ObservableCollection<IProperty> propertyList;
    public ObservableCollection<IProperty> PropertyList
    {
        get
        {
            if (propertyList == null)
                propertyList = new ObservableCollection<IProperty>();
            return propertyList;
        }
    }
}

public class Object
{
    private ObservableCollection<Component> componentList;
    public ObservableCollection<Component> ComponentList 
    {
        get
        {
            if (componentList == null)
                componentList = new ObservableCollection<Component>();
            return componentList;
        }
    }
}

XAML：

      <DataTemplate DataType="{x:Type local:Component}">
          <StackPanel>
              <TextBlock Text="TEST COMPONENT" />
              <ListBox ItemsSource="{Binding PropertyList, Mode=OneWay}" />
          </StackPanel>
      </DataTemplate>

      <DataTemplate DataType="{x:Type local:Object}">
          <StackPanel>
              <TextBlock Text="TEST OBJECT" />
              <ListBox ItemsSource="{Binding ComponentList, Mode=OneWay}" />
          </StackPanel>
      </DataTemplate>

ListBox ItemsSource WPF绑定

1 个答案: