Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>A <code>HierarchicalDataTemplate</code> is a way of saying 'this is how you render this type of object and here is a property that can be probed to find the child nodes under this object'</p> <p>Therefore you need a single property that returns the 'children' of this node. e.g. (If you can't make both Group and Entry derive from a common Node type)</p> <pre><code>public class Group{ .... public IList&lt;object&gt; Items { get { IList&lt;object&gt; childNodes = new List&lt;object&gt;(); foreach (var group in this.SubGroups) childNodes.Add(group); foreach (var entry in this.Entries) childNodes.Add(entry); return childNodes; } } </code></pre> <p>Next you don't need a <code>HierDataTemplate</code> for entry since an entry doesn't have children. So the XAML needs to be changed to use the new Items property and a <code>DataTemplate</code> for Entry:</p> <pre><code>&lt;TreeView Name="GroupView" Grid.Row="0" Grid.Column="0" ItemsSource="{Binding}"&gt; &lt;TreeView.Resources&gt; &lt;HierarchicalDataTemplate DataType="{x:Type local:Group}" ItemsSource="{Binding Items}"&gt; &lt;TextBlock Text="{Binding Path=Name}" /&gt; &lt;/HierarchicalDataTemplate&gt; &lt;DataTemplate DataType="{x:Type local:Entry}" &gt; &lt;TextBlock Text="{Binding Path=Name}" /&gt; &lt;/DataTemplate&gt; &lt;/TreeView.Resources&gt; &lt;/TreeView&gt; </code></pre> <p>And here's what that looks like. <img src="https://lh4.ggpht.com/_nxgDpneh8yk/Syh6K2zgFxI/AAAAAAAAAzQ/QIRgTsKqhlk/s288/HierarchicalDataTemplate_longDay.jpg" alt="Screenshot of Output"></p>
    singulars
    1. This table or related slice is empty.
    1. POWPF TreeView HierarchicalDataTemplate - binding to object with multiple child collections
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USCommunity
    1. USGishu
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POWPF TreeView HierarchicalDataTemplate - binding to object with multiple child collections
      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 from me - because you validated my own answer on both points ;)
      singulars
      1. PO
      1. USkiwipom
    2. COAnd +1 from me because, well, it's the right answer :)
      singulars
      1. PO
      1. USAnvaka
    3. CO@Gishu: What do you think of my alternative implementation (see my answer)? I prefer to use a return type of `IEnumerable` except when I really use an `IList`. Additionally, this method allows us to utilize the `yield` keyword to simplify the code.
      singulars
      1. PO
      1. USMatthew
 

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