Como: Alinhar o Conteúdo Horizontalmente e Verticalmente em um PainelPilha

Este exemplo mostra como ajustar o Orientation de um conteúdo dentro de um elemento StackPanel , e também como ajustar o HorizontalAlignment e VerticalAlignment de um elemento filho.

Exemplo

O exemplo a seguir cria três ListBox elementos Extensible Application Markup Language (XAML). Cada ListBox representa os possíveis valores das Orientation, HorizontalAlignment, e VerticalAlignment Propriedades de um StackPanel. Quando um usuário seleciona um valor em qualquer um dos elementos da ListBox , a propriedade associada do StackPanel e seus elementos Button filhos são modificados.

                <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>

O seguinte arquivo de code-behind define as alterações para os eventos associados com o ListBox alterações na seleção. StackPanel is identified by the Name sp1.

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

 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;
            }
        }

For the complete sample, see Exemplo de posicionamento StackPanel.

Consulte também

Conceitos

Panels Overview

Referência

StackPanel

ListBox

HorizontalAlignment

VerticalAlignment