c# - 对象的 WPF 绑定(bind)列表到自定义控件

Question

我正在尝试将设备对象列表绑定(bind)到我正在处理的服装控件。我收到这个错误。

A 'Binding' cannot be set on the 'Devices' property of type 'CamaraSelection'. A 'Binding' can only be set on a DependencyProperty of a DependencyObject.

xml代码

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

控制代码

    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(bind)的属性必须是 DependencyProperty .在您的情况下，它是 Devices -属性(property)。 DependencyProperty.Register() 方法中的第一个参数必须是您的属性的名称。代码中的第一个参数是 "DeviceList"但您的属性(property)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); }
}