Silverlight: Cannot resolve TargetProperty or OMG how hard can it be to debug this cr...p
Sorry for the title of this post, but a little bit frustrated after using a looong time to find out why my animations didn't work.
I tried rotating two usercontrols on a page, and I constantly got this runtime-error:
Cannot resolve TargetProperty (UIElement.Projection).(PlaneProjection.RotationY) on specified object.
My setup was a kind of Master-Detail story, where I wanted the details usercontrol to rotate in when selecting an item in my master-control.
So I already had my ViewModel, my States and Messages setup and working.
Now I just wanted to try to get that sweet rotation thingie going, and that's the part that was giving me some headache:
My VisualState was something like this:
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="Visning">
<VisualState x:Name="Liste">
<Storyboard>
<DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="List"
Storyboard.TargetProperty="(UIElement.Projection).(PlaneProjection.RotationY)">
<DiscreteDoubleKeyFrame KeyTime="00:00:00" Value="0" />
<EasingDoubleKeyFrame KeyTime="00:00:00.2500000" Value="90">
<EasingDoubleKeyFrame.EasingFunction>
<PowerEase EasingMode="EaseIn"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
<DiscreteDoubleKeyFrame KeyTime="00:00:00.25" Value="-90" />
<EasingDoubleKeyFrame KeyTime="00:00:00.5000000" Value="0">
<EasingDoubleKeyFrame.EasingFunction>
<PowerEase EasingMode="EaseOut"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
</DoubleAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Details"
Storyboard.TargetProperty="(UIElement.Visibility)">
<DiscreteObjectKeyFrame KeyTime="00:00:00.25" Value="Collapsed" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="List"
Storyboard.TargetProperty="(UIElement.Visibility)">
<DiscreteObjectKeyFrame KeyTime="00:00:00.25" Value="Visible" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Detaljer">
…. the opposite….
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
And my two Usercontrols:
<views:TilbudsListe x:Name="List">
</views:TilbudsListe>
<views:TilbudDetaljer x:Name="Details" Visibility="Collapsed">
</views:TilbudDetaljer>
When using these Storyboards, I get the aforementioned runtime-exception:
Cannot resolve TargetProperty (UIElement.Projection).(PlaneProjection.RotationY) on specified object.
I tried googling this, I checked my code, my xaml, my naming, my eyes, my keyboard…. etc but just couldn't get this to work.
Finally I saw someones examplecode, looking kind-of half finished I thought:
<Rectangle x:Name="rectangle" Stroke="Black" Height="113" Width="170" Canvas.Left="102" Canvas.Top="83" Fill="#FFF64040">
<Rectangle.Projection>
<PlaneProjection/>
</Rectangle.Projection>
</Rectangle>
At first I had just thought that the empty Rectangle.Projection properties was because of some code he had tried and then forgotten to remove.
But then it struck me; could this be the "magic" needed for xaml/silverlight to put the missing properties on my usercontrols?
And it was. Here is the revised usercontrols:
<views:TilbudsListe x:Name="List">
<views:TilbudsListe.Projection>
<PlaneProjection/>
</views:TilbudsListe.Projection>
</views:TilbudsListe>
<views:TilbudDetaljer x:Name="Details" Visibility="Collapsed">
<views:TilbudDetaljer.Projection>
<PlaneProjection/>
</views:TilbudDetaljer.Projection>
</views:TilbudDetaljer>
This obviously (?) works, and my two views now rotate in and out.
Arrrgggggh!
I want the last two hours back! Now!!
Better luck for anyone reading this…
rgds
Henri Merkesdal
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