我不了解有关绑定(bind)的内容。我有一个用于类型对象的 DataTemplate 正在工作,但在那里我想制作另一个 ListBox 并将数据设置为对象的一个​​属性的数据。我一直在用Snoop查看数据上下文,对象ListBox中的DataTemplate的数据上下文是一个Object,但是ItemsSource有错误,不知道为什么。我在做 ItemsSource={Binding componentList, Mode=TwoWay} 并且一个 Object 有一个 componentList 而 componentList 是一个 ObservableList 。我错过了什么?

这是我的 XAML 代码:

<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>

还有我的 C# 代码:
public class Component
{
  public string name;
  public ObservableCollection<IProperty> propertyList;
}

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

我在代码中创建了一个 ListBox 并将它的 ItemsSource 设置为一个对象列表,这就是我的对象 DataTemplate ,但这就是它停止的地方
ListBox properties = new ListBox();
ObservableCollection<Properties.Object> t = new ObservableCollection<Properties.Object>();
t.Add(selectedObject); //potentially more objects
properties.ItemsSource = t;
PropertyPane.Content = properties;

任何帮助将非常感激。谢谢!

最佳答案

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(bind)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,这里是您的代码的延续:

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>

关于c# - ListBox ItemsSource WPF 绑定(bind),我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/22443918/

10-11 21:38