Databases
StackOverflow2013
Postsdbo
POWPF - TreeView - How to programmatically extract the style of a TreeViewItem (selected style)
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POWPF - TreeView - How to programmatically extract the style of a TreeViewItem (selected style)
    primarykey
    data
    text
    <p>I want to assign a new DataTrigger programmatically (in code/not xaml) to every "TreeViewItem" style like I do in the following xaml. </p> <p>I did some code (under xaml) where I defined my trigger but "ItemContainerStyle" is null. The function is called on Window Initialize event.</p> <p>Anybody has an idea what I'm doing wrong ?</p> <p><strong>EDIT</strong></p> <p>I found some part of my problem: I moved my style from the "Resource" section to the "ItemContainerStyle" section as defined below in code sample. This way the style is still applied and I can access the style from the TReeView.ItemContainerStyle property in code. But I still don't know how to get the TreeViewItem selected style like the color of the background by code ??</p> <p>I have xaml:</p> <pre><code> &lt;TreeView Name="TreeViewSelectScopeStudy" MinHeight="24" Margin="7" ItemsSource="{Binding Path=TvItemRootPssTreeViewRoot.ChildsView}" Height="Auto" VerticalAlignment="Stretch" VirtualizingStackPanel.IsVirtualizing="True" VirtualizingStackPanel.VirtualizationMode="Recycling"&gt; &lt;TreeView.Resources&gt; &lt;Style TargetType="TreeViewItem"&gt; &lt;Setter Property="IsExpanded" Value="{Binding Path=IsExpanded}"/&gt; &lt;Style.Triggers&gt; &lt;DataTrigger Binding="{Binding Path=IsHilighted}" Value="true"&gt; &lt;!--&lt;Setter Property="Background" Value="SlateBlue"&gt;&lt;/Setter&gt;--&gt; &lt;Setter Property="Background" Value="{StaticResource {x:Static SystemColors.HighlightBrushKey}}"&gt;&lt;/Setter&gt; &lt;/DataTrigger&gt; &lt;/Style.Triggers&gt; &lt;/Style&gt; </code></pre> <p>I have that code:</p> <pre><code> public static void EnableMultipleSelection(TreeView treeView) { if (!_isMultiSelectTreeViewLeftButtonHandlerRegistered) { EventManager.RegisterClassHandler(typeof(TreeViewItem), UIElement.MouseDownEvent, new MouseButtonEventHandler(TreeViewMouseDownGlobal)); _isMultiSelectTreeViewLeftButtonHandlerRegistered = true; } DataTrigger dataTrigger = new DataTrigger(); dataTrigger.Binding = new Binding("IsHilighted"); dataTrigger.Value = true; dataTrigger.Setters.Add(new Setter(TreeViewItem.BackgroundProperty, new SolidColorBrush(Colors.Brown))); treeView.ItemContainerStyle.Triggers.Add(dataTrigger); </code></pre> <p><strong>Edited code:</strong></p> <pre><code> &lt;TreeView Name="TreeViewSelectScopeStudy" MinHeight="24" Margin="7" ItemsSource="{Binding Path=TvItemRootPssTreeViewRoot.ChildsView}" Height="Auto" VerticalAlignment="Stretch" VirtualizingStackPanel.IsVirtualizing="True" VirtualizingStackPanel.VirtualizationMode="Recycling"&gt; &lt;TreeView.ItemContainerStyle&gt; &lt;Style TargetType="TreeViewItem"&gt; &lt;Setter Property="IsExpanded" Value="{Binding Path=IsExpanded}"/&gt; &lt;Style.Triggers&gt; &lt;DataTrigger Binding="{Binding Path=IsHilighted}" Value="true"&gt; &lt;Setter Property="Background" Value="{StaticResource {x:Static SystemColors.HighlightBrushKey}}"&gt;&lt;/Setter&gt; &lt;/DataTrigger&gt; &lt;/Style.Triggers&gt; &lt;/Style&gt; &lt;/TreeView.ItemContainerStyle&gt; &lt;TreeView.Resources&gt; &lt;!--&lt;Style TargetType="TreeViewItem"&gt; &lt;Setter Property="IsExpanded" Value="{Binding Path=IsExpanded}"/&gt; &lt;Style.Triggers&gt; &lt;DataTrigger Binding="{Binding Path=IsHilighted}" Value="true"&gt; &lt;Setter Property="Background" Value="{StaticResource {x:Static SystemColors.HighlightBrushKey}}"&gt;&lt;/Setter&gt; &lt;/DataTrigger&gt; &lt;/Style.Triggers&gt; &lt;/Style&gt;--&gt; </code></pre>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USEric Ouellet
    1. USEric Ouellet
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. This table or related slice is empty.
 

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