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Asked: 2026-05-11T00:39:46+00:00

PHEW. I’m serious. I’ll spell it out as follows… The Storyboard has a Key

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PHEW.

I’m serious. I’ll spell it out as follows…

The Storyboard has a Key ‘myStoryboard’. It’s held in a DataTemplate with a key ‘myDataTemplate’.

This data template is used in a ContentControl with the name ‘myContentControl’ by this tag:

<ContentControl Name='myContentControl'      ContentTemplate='{DynamicResource myDataTemplate}'/>

The content control is used in my UserControl. In the UserControl codebehind I’ve made a keyboard gesture that supposed to start ‘myStoryBoard’ but i’m having no such luck getting to it. 

private void StartSB(object sender, ExecutedRoutedEventArgs e)  {    Storyboard sb = (Storyboard) this.TryFindResource('myStoryboard');    sb.Begin(this);   }

sb is always null here. How can i get the Storyboard?

UPDATE:

so playing with TryFindResource() I’ve managed to get to myDataTemplate

private void StartSB(object sender, ExecutedRoutedEventArgs e)  {    object sb = this.myContentControl.TryFindResource('myDataTemplate');   }

in the Locals viewer I can see sb is myDataTemplate. I can see in the tree sb.base.Resources.Keys which is an array of resources in which ‘myStoryboard’ is inside. Oh so close!

UPDATE2:

More code complete here. I realize now this may be too spaghettified to explain with words. 

<UserControl >    <UserControl.Resources>    <ResourceDictionary>         <ResourceDictionary.MergedDictionaries>             <ResourceDictionary Source='Resources\myUCResources.xaml' />         </ResourceDictionary.MergedDictionaries>     </ResourceDictionary>   </UserControl.Resources>   <ContentControl Name='myContentControl'              ContentTemplate='{DynamicResource myDataTemplate}'                 Content='{Binding}' />    ...  </UserControl>

now the codebehind for this User control

namespace myclass  {    public partial class myUserControl: UserControl,  System.ComponentModel.INotifyPropertyChanged     {       ...        public myUserControl()        {           InitializeComponent();            <!--setup keybinding-->        }         public void KeyBindExecuted(object sender, ExecutedRoutedEventArgs e)        {           Object sb = this.myContentControl.TryFindResource('myDataTemplate');            //sb returns the DataTemplate        }      }  }

And finally the resource dictionary containing the UI stuff and the animation I ultimately want to trigger. (myUCResources.xaml)

<ResourceDictionary>      <DataTemplate x:Key='myDataTemplate' >          <Grid>             <!-- elements like buttons -->          </Grid>          <DataTemplate.Resources>              <Storyboard x:Key='myStoryBoard'>                  <DoubleAnimation>                      <!-- animation stuff-->                  </DoubleAnimation>               </Storyboard>          </DataTemplate.Resources>          <DataTemplate.Triggers>              <EventTrigger SourceName='aButton' RoutedEvent='Button.Click'>                   <BeginStoryboard Storyboard='{StaticResource myStoryBoard}' />                 </EventTrigger>         </DataTemplate.Triggers>      </DataTemplate>  </ResourceDictionary>

Update 3:

ok different approach. Can I use the EventTrigger in the DataTemplate from the codebehind to start the animation?

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1 Answer

  1. AH HAH!

    So I found a roundabout way to solving this. My third update where I entertained the thought of just firing an event seemed more fruitful. All can be found here.

    http://www.codeproject.com/script/Forums/View.aspx?fid=1004114&msg=2827455

    In a nutshell I used FindResource to get the DataTemplate, then FindName of the button in the DataTemplate used to normally trigger the animation. Then I raised a button click on that button.

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