UWP InvokeCommandAction on TextBox inside ListView MVVM
<p>i have a problem to bind a command in a usercontrol included in a view.</p>

<p>UserControl.xaml</p>

<pre><code>&lt;DataTemplate x:Key="SoldItemDataTemplate" x:DataType="data:SoldItem"&gt;
    &lt;Grid HorizontalAlignment="Stretch"&gt;
        &lt;Grid.ColumnDefinitions&gt;
         ...
        &lt;/Grid.ColumnDefinitions&gt;
         ...
            &lt;TextBox Grid.Column="2" Text="{x:Bind q}"&gt;
                &lt;Interactivity:Interaction.Behaviors&gt;
                    &lt;Core:EventTriggerBehavior EventName="TextChanged"&gt;
                        &lt;Core:InvokeCommandAction Command="{Binding Path=DataContext.QChanged, ElementName=SoldRows}" CommandParameter="{Binding Mode=TwoWay}"/&gt;
                    &lt;/Core:EventTriggerBehavior&gt;
                &lt;/Interactivity:Interaction.Behaviors&gt;
            &lt;/TextBox&gt;
        &lt;/Grid&gt;
&lt;/DataTemplate&gt;
...
&lt;ListView x:Name="SoldRows"
    ItemsSource="{Binding SoldItemsList , Mode=TwoWay}" 
    IsItemClickEnabled="True" 
    ItemTemplate="{StaticResource SoldItemDataTemplate}"&gt;
...
</code></pre>

<p>MainPage.xaml</p>

<pre><code>&lt;Page.DataContext&gt;
    &lt;vm:MainPageViewModel x:Name="ViewModel"&gt;&lt;/vm:MainPageViewModel&gt;
&lt;/Page.DataContext&gt;
...
&lt;controls:UserControl Grid.Row="1"&gt;&lt;/controls:UserControl&gt;
...
</code></pre>

<p>MainPageViewModel.cs</p>

<pre><code>...
private DelegateCommand&lt;object&gt; _QSoldChanged;
...
public DelegateCommand&lt;object&gt; QSoldChanged
    {
        get
        {
            if (_QSoldChanged == null)
            {
                _QSoldChanged = new DelegateCommand&lt;object&gt;((object par) =&gt;
                {
                    ...
                });
            }

            return _QSoldChanged;
        }
    }
</code></pre>

<p>So, i'd like to call QSoldChanged, on TextChanged event, but nothing happens. What am i missing? Is that the right way to set command in this case?
If you need more just ask!
Thanks in advance</p>