c# - `...is not a DependencyProperty` 使用依赖属性和样式触发器时

Question

在我的用户控件中:

public ODIF.DeviceChannel Channel
{
    get { return (ODIF.DeviceChannel)GetValue(ChannelDP); }
    set { SetValue(ChannelDP, value); }
} 

public static readonly DependencyProperty ChannelDP = DependencyProperty.Register(
    "ChannelProperty", 
    typeof(ODIF.DeviceChannel),
    typeof(ChannelBox), 
    new PropertyMetadata(new ODIF.DeviceChannel()));

然后尝试在 XAML 中使用我的控件并绑定(bind)到 Channel使用数据触发器:

<local:ChannelBox VerticalAlignment="Top" HorizontalAlignment="Left" Width="200">
    <local:ChannelBox.Resources>
        <local:TypeOfConverter x:Key="TypeOfConverter"/>
    </local:ChannelBox.Resources>
    <local:ChannelBox.Style>
        <Style TargetType="{x:Type local:ChannelBox}">
            <Style.Triggers>
                <DataTrigger Binding="{Binding mappingConnector, Converter={StaticResource TypeOfConverter}}" Value="{x:Type ODIF:MappingConnector}">
                    <Setter Property="Channel" Value="{Binding mappingConnector.plugin}" />
                </DataTrigger>
                <DataTrigger Binding="{Binding mappingConnector, Converter={StaticResource TypeOfConverter}}" Value="{x:Type ODIF:InitialMappingConnector}">
                    <Setter Property="Channel" Value="{Binding mappingConnector.SourceChannel}" />
                </DataTrigger>
            </Style.Triggers>
        </Style>
    </local:ChannelBox.Style>
</local:ChannelBox>

在 XAML 中引发以下错误:

The property "Channel" is not a DependencyProperty. To be used inmarkup, non-attached properties must be exposed on the target typewith an accessible instance property "Channel". For attachedproperties, the declaring type must provide static "GetChannel" and"SetChannel"methods.

但与错误让我相信的相反(我以某种方式错误地设置了 DP)，以下似乎工作正常:

<local:ChannelBox VerticalAlignment="Top" HorizontalAlignment="Left" Width="200" Channel="{Binding mappingConnector.plugin}">

这意味着它似乎只有在 DataTrigger 中用作 Setter 属性时才会出现 DP 问题......

Answer 1

尝试命名您的静态属性 ChannelProperty而不是 ChannelDP .