Cannot resolve TargetProperty (UIElement.Projection)(PlaneProjection.RotationY) on specified object.

Question

I want to flip a Grid in my UserControl but the animation doesn't work

First approach:

XAML

<UserControl.Resources>
        <Storyboard x:Name="flipping">
            <DoubleAnimation Duration="0:0:5" From="0" To="180" Storyboard.TargetName="content" Storyboard.TargetProperty="(UIElement.Projection)(PlaneProjection.RotationY)"/>
        </Storyboard>
</UserControl.Resources>

<Grid x:Name="content">
        <Grid.Projection>
            <PlaneProjection/>
        </Grid.Projection>
        ...
</Grid>
    

Code behind:

flipping.Begin();

throws an Exception:

Cannot resolve TargetProperty (UIElement.Projection)(PlaneProjection.RotationY) on specified object.

Second approach:

content.Projection = new PlaneProjection();

var pointedStoryboard = new Storyboard();
var doubleAnnimationX = new DoubleAnimation();
doubleAnnimationX.Duration = TimeSpan.FromMilliseconds(500);
doubleAnnimationX.To = 2;

pointedStoryboard.Children.Add(doubleAnnimationX);
Storyboard.SetTarget(doubleAnnimationX, content);
Storyboard.SetTargetProperty(doubleAnnimationX, "(UIElement.Projection).(PlaneProjection.RotationY)");

pointedStoryboard.Begin();

Same error

Translating and Scaling using this code works without any issues.

Can anyone help me ?

Answer 1

Hi, hppDev

Try to change your XAML like below:

<UserControl.Resources>
        <Storyboard x:Name="flipping">
            <DoubleAnimation Duration="0:0:5" From="0" To="180" Storyboard.TargetName="content" Storyboard.TargetProperty="RotationY"/>
        </Storyboard>
</UserControl.Resources>

<Grid>
        <Grid.Projection>
            <PlaneProjection RotationY="0" x:Name="content"/>
        </Grid.Projection>
        ...
    </Grid>

Best Wishes!

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Answer 2

Thanks for the help, it worked.