c# – 在StoryBoard上设置自定义附加属性

我有一个故事板,并希望设置附加属性VisualStateUtility.InitialState.我尝试了各种组合,但财产永远不会得到解决.

我收到以下错误：无法解析TargetProperty(VisualStateUtility.InitialState)

如何在Storyboard上设置自定义附加属性的值？

<ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetProperty="(Fully.Qualified.Namespace.VisualStateUtility.InitialState)"  Storyboard.TargetName="ExpanderButton">

public static string GetinitialState(DependencyObject obj)
    {
        return (string)obj.GetValue(InitialStateProperty);
    }

    public static void SetinitialState(DependencyObject obj,string value)
    {
        obj.SetValue(InitialStateProperty,value);
    }

    // Using a DependencyProperty as the backing store for InitialState.  This enables animation,styling,binding,etc...
    public static readonly DependencyProperty InitialStateProperty =
        DependencyProperty.Registerattached("InitialState",typeof(string),typeof(VisualStateUtility),new PropertyMetadata(null,OnInitialStatePropertyChanged));

解决方法

这应该可以解决问题

<ObjectAnimationUsingKeyFrames x:Name="animation" Duration="0" Storyboard.TargetProperty="xmlnsAlias:VisualStateUtility.InitialState"  Storyboard.TargetName="ExpanderButton">

注意如何将名称添加到动画中,从目标属性名称中删除括号,然后使用xaml标头中的xmlns别名作为前缀.

在你的代码背后,你必须添加这个：

InitializeComponent();
Storyboard.SetTargetProperty(animation,new PropertyPath(Fully.Qualified.Namespace.VisualStateUtility.InitialState));

显然,最后一步是动画自定义附加属性所必需的.如果你问我,真的很痛苦.