WFP绑定列表oc对象到Custume控件

Question

我试图将设备对象列表绑定到我正在处理的服装控件上。我知道这个错误。

“绑定”不能设置在“CamaraSelection”类型的“设备”属性上。“绑定”只能设置在DependencyProperty的DependencyObject上。

xml代码

<trainControl:CamaraSelection  Devices="{Binding DeviceList}" HorizontalAlignment="Stretch" VerticalAlignment="Stretch"/>

控制码

    private List<Device> devices = new List<Device>();
    public static readonly DependencyProperty DeviceListProperty =
    DependencyProperty.Register("DeviceList", typeof(List<Device>), typeof(CamaraSelection),
                            new PropertyMetadata(default(ItemCollection), OnDeviceListChanged));


    private static void OnDeviceListChanged(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs dependencyPropertyChangedEventArgs)
    {
        var camaraSelection = dependencyObject as CamaraSelection;

        if (camaraSelection != null)
        {
            camaraSelection.OnDeviceListChanged(dependencyPropertyChangedEventArgs);
        }
    }
    private void OnDeviceListChanged(DependencyPropertyChangedEventArgs e)
    {

    }

    public List<Device> Devices
    {
        get { return (List<Device>)GetValue(DeviceListProperty); }
        set { SetValue(DeviceListProperty, value); }
    }

Answer 1

设置绑定的属性必须是DependencyProperty。在你的例子中，它是Devices-property。DependencyProperty.Register()方法中的第一个参数必须是属性的名称。代码中的第一个参数是"DeviceList"，但属性的名称是Devices。

public static readonly DependencyProperty DevicesProperty =
DependencyProperty.Register("Devices", typeof(List<Device>), typeof(CamaraSelection),
                        new PropertyMetadata(default(ItemCollection), OnDeviceListChanged));


public List<Device> Devices
{
    get { return (List<Device>)GetValue(DevicesProperty ); }
    set { SetValue(DevicesProperty, value); }
}

Answer 2

类中的“设备”属性必须是依赖项属性，而不是"DeviceList“。绑定到的属性必须是依赖项属性。