Question

在我的UserControl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中使用我的控件并使用datatriggers绑定到Channel时：

<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：

该物业＆＃34;频道＆＃34;不是DependencyProperty。用于必须在目标类型上公开标记，非附加属性具有可访问的实例属性＆＃34;频道＆＃34;。对于附件属性，声明类型必须提供静态＆＃34; GetChannel＆＃34;和＆＃34; SetChannel＆＃34; 方法

但与错误会让我相信（我以某种方式设置DP错误）相反，以下似乎工作正常：

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

这意味着当DP在DataTrigger中用作Setter属性时，DP似乎只有问题...

Answer 1

尝试命名静态属性ChannelProperty而不是ChannelDP。

使用依赖项属性和样式触发器时，`...不是DependencyProperty`

1 个答案: