ItemsControl ItemTemplate绑定

Question

在WPF4.0中,我有一个类包含其他类类型作为属性(组合多个数据类型用于显示).就像是:

public partial class Owner
{
     public string OwnerName { get; set; }
     public int    OwnerId   { get; set; }
}

partial class ForDisplay
{
    public Owner OwnerData { get; set; }
    public int Credit { get; set; }
}

在我的窗口中,我有一个带有以下内容的ItemsControl(为了清晰起见而剪裁):

<ItemsControl ItemsSource={Binding}>
    <ItemsControl.ItemTemplate>
        <DataTemplate>
          <local:MyDisplayControl 
                OwnerName={Binding OwnerData.OwnerName}
                Credit={Binding Credit} />
        </DataTemplate>
    </ItemsControl.ItemTemplate>
</ItemsControl>

然后我得到的数据层显示信息的集合,并设置DataContext的ItemsControl这个集合."Credit"属性正确显示,但OwnerName属性不正确.相反,我得到一个绑定错误:

错误40:BindingExpression路径错误:'对象'上找不到'OwnerName'属性''ForDisplay'(HashCode = 449124874)'.BindingExpression:路径= OWNERNAME; DataItem ='ForDisplay'(HashCode = 449124874); target元素是'TextBlock'(Name = txtOwnerName'); target属性是'Text'(类型'String')

我不明白为什么这会尝试在ForDisplay类中查找OwnerName属性,而不是在ForDisplay OwnerData属性的Owner类中查找.

编辑 它似乎与使用自定义控件有关.如果我将相同的属性绑定到a TextBlock,它们可以正常工作.

<ItemsControl ItemsSource={Binding}>
    <ItemsControl.ItemTemplate>
        <DataTemplate>
          <StackPanel>
              <local:MyDisplayControl 
                        OwnerName={Binding OwnerData.OwnerName}
                        Credit={Binding Credit} />
              <TextBlock Text="{Binding OwnerData.OwnerName}" />
              <TextBlock Text="{Binding Credit}" />
          </StackPanel>
        </DataTemplate>
    </ItemsControl.ItemTemplate>
</ItemsControl>

Answer 1

您确定您在此处发布的代码是您在解决方案中使用的代码吗？因为,这段代码对我有用:

XAML

<ItemsControl ItemsSource="{Binding}">
    <ItemsControl.ItemTemplate>
        <DataTemplate>
            <StackPanel>
                <TextBlock Text="{Binding OwnerData.OwnerName}"></TextBlock>
                <TextBlock Text="{Binding Credit}" />
            </StackPanel>
        </DataTemplate>
    </ItemsControl.ItemTemplate>
</ItemsControl>

Window的加载事件

ObservableCollection<ForDisplay> items = new ObservableCollection<ForDisplay>();

for (int i = 0; i < 10; i++)
{
    items.Add(new ForDisplay() { OwnerData = new Owner() { OwnerId = i + 1, OwnerName = String.Format("Owner #{0}", i + 1) }, Credit = i + 1 });
}

DataContext = items;