我正在尝试将设备对象列表绑定到我正在处理的服装控件。我收到此错误。
不能在类型的"设备"属性上设置"绑定" "卡马拉选择"。只能在依赖项属性上设置"绑定" 的依赖对象。
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); }
}
设置绑定的属性必须是DependencyProperty
。在您的情况下,它是Devices
属性。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); }
}
类中的"设备"属性必须是依赖项属性,而不是"设备列表"。要绑定到的属性必须是依赖项属性。