Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>As you guessed correctly, templates and triggers are indeed your friend here.</p> <p>Here is an implementation using the <code>ContentControl</code>:</p> <pre><code>&lt;ContentControl Content="{Binding Path=UserAvatar}"&gt; &lt;ContentControl.ContentTemplate&gt; &lt;DataTemplate&gt; &lt;Image x:Name="image" Source="{Binding}"/&gt; &lt;DataTemplate.Triggers&gt; &lt;DataTrigger Binding="{Binding}" Value="{x:Null}"&gt; &lt;Setter TargetName="image" Property="Source" Value="--your awesome default image here--" /&gt; &lt;/DataTrigger&gt; &lt;/DataTemplate.Triggers&gt; &lt;/DataTemplate&gt; &lt;/ContentControl.ContentTemplate&gt; &lt;/ContentControl&gt; </code></pre> <p>And in the situation when your default thingy is no <code>ImageSource</code>, and you wish to play around a bit with other controls, you can always resort to the <code>Visibilty</code> property:</p> <pre><code>&lt;ContentControl Content="{Binding Path=UserAvatar}"&gt; &lt;ContentControl.ContentTemplate&gt; &lt;DataTemplate&gt; &lt;Grid&gt; &lt;Image x:Name="image" Source="{Binding}" /&gt; &lt;Canvas x:Name="defaultImage" Visibility="Collapsed" /&gt; &lt;/Grid&gt; &lt;DataTemplate.Triggers&gt; &lt;DataTrigger Binding="{Binding}" Value="{x:Null}"&gt; &lt;Setter TargetName="image" Property="Visibility" Value="Collapsed" /&gt; &lt;Setter TargetName="defaultImage" Property="Visibility" Value="Visible" /&gt; &lt;/DataTrigger&gt; &lt;/DataTemplate.Triggers&gt; &lt;/DataTemplate&gt; &lt;/ContentControl.ContentTemplate&gt; &lt;/ContentControl&gt; </code></pre> <p>Hope this helps..</p>
    singulars
    1. This table or related slice is empty.
    1. POConditional FrameworkElements depending on DataContext
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USDave Clemmer
    1. USArcturus
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POConditional FrameworkElements depending on DataContext
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. CO+1 beat me to it :)
      singulars
      1. PO
      1. USCameron MacFarland
    2. COBut how about the default image if there's no UserAvatar? Another ContentControl? Seems that I need a not-null DataTrigger. I just discovered http://stackoverflow.com/questions/356194/wpf-datatrigger-where-value-is-not-null, which proposes a custom ValueConverter.
      singulars
      1. PO
      1. USThomas Freudenberg
    3. COD'uh. Should learn to read. You're solution is exactly what I was looking for, Arcturus. There's only one point left before I accept your answer: the default avatar isn't an ImageSource but a canvas, so the Image element must be replaced somehow (or hidden)
      singulars
      1. PO
      1. USThomas Freudenberg
 

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