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POSetting CommandTarget to selected control in a TabControl
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  1. POSetting CommandTarget to selected control in a TabControl
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    copied!<p>I have a WPF window with a few buttons and a tabcontrol having a tab for each 'document' the user is working on. The tabcontrol uses a DataTemplate to render the data in ItemSource of the tabcontrol. </p> <p><strong>The question:</strong> If one of the buttons is clicked, the command should be executed on the control rendering the document in the active tab, but I've no idea what I should set CommandTarget to. I tried {Binding ElementName=nameOfControlInDataTemplate} but that obviously doesn't work.</p> <p>I tried to make my problem a bit more abstract with the following code (no ItemSource and Document objects, but the idea is still the same).</p> <pre><code>&lt;Button Command="ApplicationCommands.Save" CommandTarget="{Binding ElementName=nestedControl}"&gt;Save&lt;/Button&gt; &lt;TabControl x:Name="tabControl"&gt; &lt;TabControl.Items&gt; &lt;TabItem Header="Header1"&gt;Item 1&lt;/TabItem&gt; &lt;TabItem Header="Header2"&gt;Item 2&lt;/TabItem&gt; &lt;TabItem Header="Header3"&gt;Item 3&lt;/TabItem&gt; &lt;/TabControl.Items&gt; &lt;TabControl.ContentTemplate&gt; &lt;DataTemplate&gt; &lt;CommandTest:NestedControl Name="nestedControl"/&gt; &lt;/DataTemplate&gt; &lt;/TabControl.ContentTemplate&gt; &lt;/TabControl&gt; </code></pre> <p>I tested the code by replacing the complete tabcontrol with only one single NestedControl, and then the command button just works.</p> <p>To be complete, here is the code of NestedControl:</p> <pre><code>&lt;UserControl x:Class="CommandTest.NestedControl" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"&gt; &lt;Grid&gt; &lt;Label x:Name="label" Content="Not saved"/&gt; &lt;/Grid&gt; &lt;/UserControl&gt; </code></pre> <p>And code behind:</p> <pre><code>public partial class NestedControl : UserControl { public NestedControl() { CommandBindings.Add(new CommandBinding(ApplicationCommands.Save, CommandBinding_Executed)); InitializeComponent(); } private void CommandBinding_Executed(object sender, ExecutedRoutedEventArgs e) { label.Content = "Saved"; } } </code></pre>
 

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