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Comment : aligner horizontalement ou verticalement le contenu dans un StackPanel

  • Article

Cet exemple montre comment ajuster le Orientation contenu dans un StackPanel élément, ainsi que comment ajuster le contenu enfant et VerticalAlignment le HorizontalAlignment contenu enfant.

Exemple

L’exemple suivant crée trois ListBox éléments dans XAML (Extensible Application Markup Language). Chacune ListBox représente les valeurs possibles du Orientation, HorizontalAlignmentet VerticalAlignment des propriétés d’un StackPanel. Lorsqu’un utilisateur sélectionne une valeur dans l’un ListBox des éléments, la propriété associée de l’élément StackPanel et ses éléments enfants Button changent.

    <ListBox VerticalAlignment="Top" SelectionChanged="changeOrientation" Grid.Row="2" Grid.Column="1" Width="100" Height="50" Margin="0,0,0,10">
        <ListBoxItem>Horizontal</ListBoxItem>
        <ListBoxItem>Vertical</ListBoxItem>
    </ListBox>

    <ListBox VerticalAlignment="Top" SelectionChanged="changeHorAlign" Grid.Row="2" Grid.Column="3" Width="100" Height="50" Margin="0,0,0,10">
        <ListBoxItem>Left</ListBoxItem>
        <ListBoxItem>Right</ListBoxItem>
        <ListBoxItem>Center</ListBoxItem>
        <ListBoxItem>Stretch</ListBoxItem>
    </ListBox>

    <ListBox VerticalAlignment="Top" SelectionChanged="changeVertAlign" Grid.Row="2" Grid.Column="5" Width="100" Height="50" Margin="0,0,0,10">
        <ListBoxItem>Top</ListBoxItem>
        <ListBoxItem>Bottom</ListBoxItem>
        <ListBoxItem>Center</ListBoxItem>
        <ListBoxItem>Stretch</ListBoxItem>
    </ListBox>

<StackPanel Grid.ColumnSpan="6" Grid.Row="3" Name="sp1" Background="Yellow">
    <Button>Button One</Button>
    <Button>Button Two</Button>
    <Button>Button Three</Button>
    <Button>Button Four</Button>
    <Button>Button Five</Button>
    <Button>Button Six</Button>
</StackPanel>

Le fichier code-behind suivant définit les modifications apportées aux événements associés aux ListBox modifications de sélection. StackPanel est identifié par le Name sp1.

private void changeOrientation(object sender, SelectionChangedEventArgs args)
    {
        ListBoxItem li = ((sender as ListBox).SelectedItem as ListBoxItem);
        if (li.Content.ToString() == "Horizontal")
        {
        sp1.Orientation = System.Windows.Controls.Orientation.Horizontal;
        }
        else if (li.Content.ToString() == "Vertical")
        {
        sp1.Orientation = System.Windows.Controls.Orientation.Vertical;
        }
    }

private void changeHorAlign(object sender, SelectionChangedEventArgs args)
    {
        ListBoxItem li = ((sender as ListBox).SelectedItem as ListBoxItem);
        if (li.Content.ToString() == "Left")
        {
        sp1.HorizontalAlignment = System.Windows.HorizontalAlignment.Left;
        }
        else if (li.Content.ToString() == "Right")
        {
        sp1.HorizontalAlignment = System.Windows.HorizontalAlignment.Right;
        }
        else if (li.Content.ToString() == "Center")
        {
        sp1.HorizontalAlignment = System.Windows.HorizontalAlignment.Center;
        }
        else if (li.Content.ToString() == "Stretch")
        {
        sp1.HorizontalAlignment = System.Windows.HorizontalAlignment.Stretch;
        }
    }

private void changeVertAlign(object sender, SelectionChangedEventArgs args)
    {
        ListBoxItem li = ((sender as ListBox).SelectedItem as ListBoxItem);
        if (li.Content.ToString() == "Top")
        {
        sp1.VerticalAlignment = System.Windows.VerticalAlignment.Top;
        }
        else if (li.Content.ToString() == "Bottom")
        {
        sp1.VerticalAlignment = System.Windows.VerticalAlignment.Bottom;
        }
        else if (li.Content.ToString() == "Center")
        {
        sp1.VerticalAlignment = System.Windows.VerticalAlignment.Center;
        }
        else if (li.Content.ToString() == "Stretch")
        {
        sp1.VerticalAlignment = System.Windows.VerticalAlignment.Stretch;
        }
    }

Private Sub changeOrientation(ByVal sender As Object, ByVal args As SelectionChangedEventArgs)
    Dim li As ListBoxItem = CType(CType(sender, ListBox).SelectedItem, ListBoxItem)
    If (li.Content.ToString() = "Horizontal") Then
        sp1.Orientation = System.Windows.Controls.Orientation.Horizontal
    ElseIf li.Content.ToString() = "Vertical" Then
        sp1.Orientation = System.Windows.Controls.Orientation.Vertical
    End If
End Sub
Private Sub changeHorAlign(ByVal sender As Object, ByVal args As SelectionChangedEventArgs)
    Dim li As ListBoxItem = CType(CType(sender, ListBox).SelectedItem, ListBoxItem)
    If (li.Content.ToString() = "Left") Then
        sp1.HorizontalAlignment = System.Windows.HorizontalAlignment.Left
    ElseIf (li.Content.ToString() = "Right") Then
        sp1.HorizontalAlignment = System.Windows.HorizontalAlignment.Right
    ElseIf (li.Content.ToString() = "Center") Then
        sp1.HorizontalAlignment = System.Windows.HorizontalAlignment.Center
    ElseIf (li.Content.ToString() = "Stretch") Then
        sp1.HorizontalAlignment = System.Windows.HorizontalAlignment.Stretch
    End If
End Sub
Private Sub changeVertAlign(ByVal sender As Object, ByVal args As SelectionChangedEventArgs)
    Dim li As ListBoxItem = CType(CType(sender, ListBox).SelectedItem, ListBoxItem)
    If (li.Content.ToString() = "Top") Then
        sp1.VerticalAlignment = System.Windows.VerticalAlignment.Top
    ElseIf (li.Content.ToString() = "Bottom") Then
        sp1.VerticalAlignment = System.Windows.VerticalAlignment.Bottom
    ElseIf (li.Content.ToString() = "Center") Then
        sp1.VerticalAlignment = System.Windows.VerticalAlignment.Center
    ElseIf (li.Content.ToString() = "Stretch") Then
        sp1.VerticalAlignment = System.Windows.VerticalAlignment.Stretch
    End If
End Sub

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