ListBox ItemsSource WPF Binding

本文关键字：Binding WPF ItemsSource ListBox | 更新日期: 2023-09-27 17:50:28

我不太理解绑定。我有一个DataTemplate类型的对象是工作的，但在那里我想做另一个ListBox，并设置一个对象的属性之一的数据。我一直在使用Snoop来查看对象DataTemplate中ListBox的数据上下文和数据上下文，但是ItemsSource有一个错误，我不知道为什么。我正在做ItemsSource={Binding componentList, Mode=TwoWay}和对象有一个componentList和componentList是一个ObservableList。我错过了什么?

下面是我的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>

和我的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ItemsSource设置为对象列表这是我的对象DataTemplate，但这是它停止的地方

ListBox properties = new ListBox();
ObservableCollection<Properties.Object> t = new ObservableCollection<Properties.Object>();
t.Add(selectedObject); //potentially more objects
properties.ItemsSource = t;
PropertyPane.Content = properties;
如有任何帮助，我将不胜感激。谢谢!

ListBox ItemsSource WPF Binding

除了我上面的评论:

你不必在代码中创建一个ListBox，在XAML中创建它，并将一个集合绑定到你的ItemsSource(依赖属性)。

一样:

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>

另外这里是你的代码的延续:

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>
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