Databases
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    <p>You can use power of Binding without additional C# code</p> <pre><code>&lt;Grid&gt; &lt;local:UserControl1 x:Name="uc1" HorizontalAlignment="Left" VerticalAlignment="Top"/&gt; &lt;StackPanel&gt; &lt;local:UserControl2 x:Name="uc2" Visibility="{Binding ElementName=uc1, Path=SelectedItem, Converter={StaticResource VisibilityConverter}}" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="150,29,0,0" /&gt; &lt;local:UserControl3 x:Name="uc3" Visibility="{Binding ElementName=uc2, Path=SelectedItem, Converter={StaticResource VisibilityConverter}}" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="340,29,0,0"/&gt; &lt;/StackPanel&gt; &lt;/Grid&gt; </code></pre> <p>or with data triggers:</p> <pre><code>&lt;Style TargetType="{x:Type Control}" x:Key="VisibilityStyle1"&gt; &lt;Setter Property="Visibility" Value="Visible" /&gt; &lt;Style.Triggers&gt; &lt;DataTrigger Binding="{Binding SelectedItem, ElementName=uc1}" Value="{x:Null}"&gt; &lt;Setter Property="Visibility" Value="Hidden" /&gt; &lt;/DataTrigger&gt; &lt;/Style.Triggers&gt; &lt;/Style&gt; &lt;Style TargetType="{x:Type Control}" x:Key="VisibilityStyle2"&gt; &lt;Setter Property="Visibility" Value="Visible" /&gt; &lt;Style.Triggers&gt; &lt;DataTrigger Binding="{Binding SelectedItem, ElementName=uc2}" Value="{x:Null}"&gt; &lt;Setter Property="Visibility" Value="Hidden" /&gt; &lt;/DataTrigger&gt; &lt;/Style.Triggers&gt; &lt;/Style&gt; &lt;Grid&gt; &lt;local:UserControl1 x:Name="uc1" HorizontalAlignment="Left" VerticalAlignment="Top"/&gt; &lt;StackPanel&gt; &lt;local:UserControl2 x:Name="uc2" Style="{DynamicResource VisibilityStyle1}" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="150,29,0,0" /&gt; &lt;local:UserControl3 x:Name="uc3" tyle="{DynamicResource VisibilityStyle2}" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="340,29,0,0"/&gt; &lt;/StackPanel&gt; &lt;/Grid&gt; </code></pre>
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    1. POHow to hide and show UserControls based on SelectedItem in ListBox WPF MVVM Model
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    1. COcan you send me your code sources, may be something wrong I understand
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    2. COI have updated my code pls Check
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    3. COI see, and how should it work if you don't use notification class User ? You can add event in all user controls, they will notification when selected items. Then in mainWindows's code behind create instanses all controls and sign up for event: `UserControl1 control1 = new UserControl1(); UserControl2 control2 = new UserControl2(control1 ); UserControl3 control3 = new UserControl3(control2);` and in class UserControl2: `public UserControl2(Control control) { control.SelectedItem+= SelectedItemChanged; }`
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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.

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