How to discrete animate GridLength from “Auto” to “*”?
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19-09-2019 - |
Question
I need to animate this property using a Storyboard
.
Is writing your own animation is a best choice?
Solution
No, it is quite possible using the standard XAML:
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" x:Name="col0"/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<Grid.Resources>
<Storyboard x:Key="sbCol0ToAuto">
<ObjectAnimationUsingKeyFrames
BeginTime="0" Duration="0"
Storyboard.TargetName="col0" Storyboard.TargetProperty="Width">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<GridLength>*</GridLength>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</Grid.Resources>
...
</Grid>
And even easier back to Auto:
<DiscreteObjectKeyFrame KeyTime="0" Value="{x:Static GridLength.Auto}">
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