Databases
StackOverflow2013
Postsdbo
POStyle within DataTemplate is only being applied to the last item in ItemsControl?
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POStyle within DataTemplate is only being applied to the last item in ItemsControl?
    primarykey
    data
    text
    <p>In the XAML below, I have an ItemsControl that has three DataObjects.<br> I use a DataTemplate to display DataObjects as Buttons with an "X" on them.<br> The Button uses a Style to set its Content. </p> <p>If the Setter.Value is "X", everything works great!<br> However, if I change the Setter.Value to a TextBlock whose TextProperty is "X", <strong>the X only appears on the last Button</strong> (the third DataObject) and the first two Buttons are empty. </p> <p><strong>Is this a bug, or can anybody explain why this happens?</strong></p> <p>Note 1) This is a contrived example to isolate the problem being encountered.<br> Note 2) I've put both Setter.Value options in the code so you can reproduce both the successful and unsuccessful cases just by having one of them commented out.<br> Note 3) It appears, this problem is specific to Setters for the 'Content' property. If I use a Setter for the Background property, it correctly applies to all of the DataObjects.</p> <pre><code>&lt;Grid&gt; &lt;Grid.Resources&gt; &lt;Style x:Key="myButtonStyle" TargetType="{x:Type Button}"&gt; &lt;Setter Property="Content"&gt; &lt;!--&lt;Setter.Value&gt;X&lt;/Setter.Value&gt;--&gt; &lt;Setter.Value&gt;&lt;TextBlock Text="X" /&gt;&lt;/Setter.Value&gt; &lt;/Setter&gt; &lt;Setter Property="Background"&gt; &lt;Setter.Value&gt; &lt;SolidColorBrush Color="Red" /&gt; &lt;/Setter.Value&gt; &lt;/Setter&gt; &lt;/Style&gt; &lt;/Grid.Resources&gt; &lt;ItemsControl&gt; &lt;ItemsControl.ItemTemplate&gt; &lt;DataTemplate DataType="{x:Type DataObject}"&gt; &lt;Button Height="24" Width="24" Style="{StaticResource myButtonStyle}" /&gt; &lt;/DataTemplate&gt; &lt;/ItemsControl.ItemTemplate&gt; &lt;ItemsControl.Items&gt; &lt;DataObject /&gt; &lt;DataObject /&gt; &lt;DataObject /&gt; &lt;/ItemsControl.Items&gt; &lt;/ItemsControl&gt; &lt;/Grid&gt; </code></pre> <p><H3>Solution:</H3> Unfortunately, I still cannot explain why the 'Content' Setter fails to work on all but the last DataObject when the Content is set to be a control such as a TextBlock rather than straight text.</p> <p>However, Dmitry's suggestion of using setting the 'ContentTemplate' instead of 'Content' is a very acceptable workaround that still allows for a re-usable Style.</p> <pre><code>&lt;Grid&gt; &lt;Grid.Resources&gt; &lt;DataTemplate x:Key="textBlockWithX"&gt; &lt;TextBlock Text="X" /&gt; &lt;/DataTemplate&gt; &lt;Style x:Key="myButtonStyle" TargetType="{x:Type Button}"&gt; &lt;Setter Property="ContentTemplate" Value="{StaticResource textBlockWithX}" /&gt; &lt;/Style&gt; &lt;/Grid.Resources&gt; &lt;ItemsControl&gt; &lt;ItemsControl.ItemTemplate&gt; &lt;DataTemplate DataType="{x:Type DataObject}"&gt; &lt;Button Height="24" Width="24" Style="{StaticResource myButtonStyle}" /&gt; &lt;/DataTemplate&gt; &lt;/ItemsControl.ItemTemplate&gt; &lt;ItemsControl.Items&gt; &lt;DataObject /&gt; &lt;DataObject /&gt; &lt;DataObject /&gt; &lt;/ItemsControl.Items&gt; &lt;/ItemsControl&gt; &lt;/Grid&gt; </code></pre>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USH.B.
    1. USScott
    plurals
    1. This table or related slice is empty.
    1. PL
      singulars
      1. LTLinked
    2. PL
      singulars
      1. LTLinked
    3. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POStyle within DataTemplate is only being applied to the last item in ItemsControl?
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POStyle within DataTemplate is only being applied to the last item in ItemsControl?
      1. USdecyclone
      1. VTFavorite
    3. VO
      singulars
      1. POStyle within DataTemplate is only being applied to the last item in ItemsControl?
      1. This table or related slice is empty.
      1. VTUpMod
    1. COHi, you obviously know that the culprit is Style within a DataTemplate, once you use Content as a plain property it all starts working.
      singulars
      1. POStyle within DataTemplate is only being applied to the last item in ItemsControl?
      1. This table or related slice is empty.
    2. COThere is definately a workaround in this contrived/simplified example. But I'm not sure I understand why this is 'By Design'. Setting the Content Setter's Value to "X" works... but setting it to a TextBlock only works for the last item... seems strange to me.
      singulars
      1. POStyle within DataTemplate is only being applied to the last item in ItemsControl?
      1. USScott
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload