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Información general sobre alineación, márgenes y relleno

  • Artículo

La clase FrameworkElement expone varias propiedades que se usan para posicionar con precisión los elementos secundarios. En este tema se describen cuatro de las propiedades más importantes: HorizontalAlignment, Margin, Padding y VerticalAlignment. Es importante comprender los efectos de estas propiedades, ya que proporcionan la base para controlar la posición de los elementos de las aplicaciones de Windows Presentation Foundation (WPF).

Introducción al posicionamiento de elementos

Existen numerosas maneras de posicionar elementos mediante WPF. Sin embargo, lograr el diseño ideal va más allá de simplemente elegir el elemento Panel correcto. El control preciso del posicionamiento requiere una comprensión de las propiedades HorizontalAlignment, Margin, Padding y VerticalAlignment.

La siguiente ilustración muestra un escenario de diseño que usa varias propiedades de posicionamiento.

Ejemplo de propiedades de posicionamiento de WPF

A primera vista, puede parecer que los elementos Button de esta ilustración están colocados de forma aleatoria. Sin embargo, sus posiciones se controlan realmente de forma precisa mediante una combinación de márgenes, alineaciones y relleno.

En el ejemplo siguiente se describe cómo crear el diseño de la ilustración anterior. Un elemento Border encapsula un StackPanel primario, con un valor Padding de 15 píxeles independientes del dispositivo. Esto explica la banda estrecha LightBlue que rodea al StackPanel secundario. Los elementos secundarios de StackPanel se usan para ilustrar cada una de las distintas propiedades de posicionamiento que se detallan en este tema. Se usan tres elementos Button para demostrar las propiedades Margin y HorizontalAlignment.


// Create the application's main Window.
mainWindow = new Window ();
mainWindow.Title = "Margins, Padding and Alignment Sample";

// Add a Border
myBorder = new Border();
myBorder.Background = Brushes.LightBlue;
myBorder.BorderBrush = Brushes.Black;
myBorder.Padding = new Thickness(15);
myBorder.BorderThickness = new Thickness(2);

myStackPanel = new StackPanel();
myStackPanel.Background = Brushes.White;
myStackPanel.HorizontalAlignment = HorizontalAlignment.Center;
myStackPanel.VerticalAlignment = VerticalAlignment.Top;

TextBlock myTextBlock = new TextBlock();
myTextBlock.Margin = new Thickness(5, 0, 5, 0);
myTextBlock.FontSize = 18;
myTextBlock.HorizontalAlignment = HorizontalAlignment.Center;
myTextBlock.Text = "Alignment, Margin and Padding Sample";
Button myButton1 = new Button();
myButton1.HorizontalAlignment = HorizontalAlignment.Left;
myButton1.Margin = new Thickness(20);
myButton1.Content = "Button 1";
Button myButton2 = new Button();
myButton2.HorizontalAlignment = HorizontalAlignment.Right;
myButton2.Margin = new Thickness(10);
myButton2.Content = "Button 2";
Button myButton3 = new Button();
myButton3.HorizontalAlignment = HorizontalAlignment.Stretch;
myButton3.Margin = new Thickness(0);
myButton3.Content = "Button 3";

// Add child elements to the parent StackPanel.
myStackPanel.Children.Add(myTextBlock);
myStackPanel.Children.Add(myButton1);
myStackPanel.Children.Add(myButton2);
myStackPanel.Children.Add(myButton3);

// Add the StackPanel as the lone Child of the Border.
myBorder.Child = myStackPanel;

// Add the Border as the Content of the Parent Window Object.
mainWindow.Content = myBorder;
mainWindow.Show ();


WindowTitle = "Margins, Padding and Alignment Sample"

'Add a Border.
Dim myBorder As New Border()
myBorder.Background = Brushes.LightBlue
myBorder.BorderBrush = Brushes.Black
myBorder.Padding = New Thickness(15)
myBorder.BorderThickness = New Thickness(2)

Dim myStackPanel As New StackPanel()
myStackPanel.Background = Brushes.White
myStackPanel.HorizontalAlignment = Windows.HorizontalAlignment.Center
myStackPanel.VerticalAlignment = Windows.VerticalAlignment.Top

Dim myTextBlock As New TextBlock()
myTextBlock.Margin = New Thickness(5, 0, 5, 0)
myTextBlock.FontSize = 18
myTextBlock.HorizontalAlignment = Windows.HorizontalAlignment.Center
myTextBlock.Text = "Alignment, Margin and Padding Sample"
Dim myButton1 As New Button()
myButton1.HorizontalAlignment = Windows.HorizontalAlignment.Left
myButton1.Margin = New Thickness(20)
myButton1.Content = "Button 1"
Dim myButton2 As New Button()
myButton2.HorizontalAlignment = Windows.HorizontalAlignment.Right
myButton2.Margin = New Thickness(10)
myButton2.Content = "Button 2"
Dim myButton3 As New Button()
myButton3.HorizontalAlignment = Windows.HorizontalAlignment.Stretch
myButton3.Margin = New Thickness(0)
myButton3.Content = "Button 3"

'Add child elements to the parent StackPanel.
myStackPanel.Children.Add(myTextBlock)
myStackPanel.Children.Add(myButton1)
myStackPanel.Children.Add(myButton2)
myStackPanel.Children.Add(myButton3)

'Add the StackPanel as the lone Child of the Border.
myBorder.Child = myStackPanel

' Add the Canvas as the lone Child of the Border
myBorder.Child = myStackPanel
Me.Content = myBorder

En el siguiente diagrama se proporciona una vista de primer plano de las distintas propiedades de posicionamiento que se usan en el ejemplo anterior. En las siguientes secciones de este tema se describe con más detalle cómo usar cada propiedad de posicionamiento.

Propiedades de posicionamiento con llamadas de pantalla

Explicación de las propiedades Alignment

Las propiedades HorizontalAlignment y VerticalAlignment describen cómo se debe colocar un elemento secundario dentro del espacio de diseño asignado a un elemento primario. Al usar estas propiedades juntas, puede posicionar los elementos secundarios con precisión. Por ejemplo, los elementos secundarios de un DockPanel pueden especificar cuatro alineaciones horizontales diferentes: Left, Right, o Center, o Stretch para llenar el espacio disponible. Para el posicionamiento vertical existen valores similares.

Nota

Las propiedades Height y Width establecidas explícitamente en un elemento tienen prioridad sobre el valor de la propiedad Stretch. Al intentar establecer Height, Width y un valor HorizontalAlignment de Stretch se ignora la solicitud Stretch.

Propiedad HorizontalAlignment

La propiedad HorizontalAlignment declara las características de alineación horizontal a aplicar a los elementos secundarios. La siguiente tabla muestra cada uno de los posibles valores de la propiedad HorizontalAlignment.

Miembro Descripción
Left Los elementos secundarios se alinean a la izquierda del espacio de diseño asignado del elemento primario.
Center Los elementos secundarios se alinean en el centro del espacio de diseño asignado del elemento primario.
Right Los elementos secundarios se alinean a la derecha del espacio de diseño asignado del elemento primario.
Stretch (Valor predeterminado) Los elementos secundarios se ajustan para rellenar el espacio de diseño asignado del elemento primario. Los valores explícitos Width y Height tienen prioridad.

El siguiente ejemplo muestra cómo aplicar la propiedad HorizontalAlignment a elementos Button. Se muestran todos los valores de atributo para ilustrar mejor los distintos comportamientos de representación.

Button myButton1 = new Button();
myButton1.HorizontalAlignment = HorizontalAlignment.Left;
myButton1.Content = "Button 1 (Left)";
Button myButton2 = new Button();
myButton2.HorizontalAlignment = HorizontalAlignment.Right;
myButton2.Content = "Button 2 (Right)";
Button myButton3 = new Button();
myButton3.HorizontalAlignment = HorizontalAlignment.Center;
myButton3.Content = "Button 3 (Center)";
Button myButton4 = new Button();
myButton4.HorizontalAlignment = HorizontalAlignment.Stretch;
myButton4.Content = "Button 4 (Stretch)";

Dim myButton1 As New Button()
myButton1.HorizontalAlignment = Windows.HorizontalAlignment.Left
myButton1.Margin = New Thickness(20)
myButton1.Content = "Button 1"
Dim myButton2 As New Button()
myButton2.HorizontalAlignment = Windows.HorizontalAlignment.Right
myButton2.Margin = New Thickness(10)
myButton2.Content = "Button 2"
Dim myButton3 As New Button()
myButton3.HorizontalAlignment = Windows.HorizontalAlignment.Center
myButton3.Margin = New Thickness(0)
myButton3.Content = "Button 3"
Dim myButton4 As New Button()
myButton4.HorizontalAlignment = Windows.HorizontalAlignment.Stretch
myButton4.Content = "Button 4 (Stretch)"

El código anterior produce un diseño similar al de la siguiente imagen. Los efectos de posicionamiento de cada valor HorizontalAlignment se pueden ver en la ilustración.

Ejemplo HorizontalAlignment

Propiedad VerticalAlignment

La propiedad VerticalAlignment describe las características de alineación vertical a aplicar a los elementos secundarios. La siguiente tabla muestra cada uno de los posibles valores de la propiedad VerticalAlignment.

Miembro Descripción
Top Los elementos secundarios se alinean en la parte superior del espacio de diseño asignado del elemento primario.
Center Los elementos secundarios se alinean en el centro del espacio de diseño asignado del elemento primario.
Bottom Los elementos secundarios se alinean en la parte inferior del espacio de diseño asignado del elemento primario.
Stretch (Valor predeterminado) Los elementos secundarios se ajustan para rellenar el espacio de diseño asignado del elemento primario. Los valores explícitos Width y Height tienen prioridad.

El siguiente ejemplo muestra cómo aplicar la propiedad VerticalAlignment a elementos Button. Se muestran todos los valores de atributo para ilustrar mejor los distintos comportamientos de representación. Para los fines de este ejemplo, un elemento Grid con las líneas de cuadrícula visibles se usa como elemento primario para ilustrar mejor el comportamiento de diseño de cada valor de propiedad.

TextBlock myTextBlock = new TextBlock();
myTextBlock.FontSize = 18;
myTextBlock.HorizontalAlignment = HorizontalAlignment.Center;
myTextBlock.Text = "VerticalAlignment Sample";
Grid.SetRow(myTextBlock, 0);
Button myButton1 = new Button();
myButton1.VerticalAlignment = VerticalAlignment.Top;
myButton1.Content = "Button 1 (Top)";
Grid.SetRow(myButton1, 1);
Button myButton2 = new Button();
myButton2.VerticalAlignment = VerticalAlignment.Bottom;
myButton2.Content = "Button 2 (Bottom)";
Grid.SetRow(myButton2, 2);
Button myButton3 = new Button();
myButton3.VerticalAlignment = VerticalAlignment.Center;
myButton3.Content = "Button 3 (Center)";
Grid.SetRow(myButton3, 3);
Button myButton4 = new Button();
myButton4.VerticalAlignment = VerticalAlignment.Stretch;
myButton4.Content = "Button 4 (Stretch)";
Grid.SetRow(myButton4, 4);

Dim myTextBlock As New TextBlock()
myTextBlock.FontSize = 18
myTextBlock.HorizontalAlignment = Windows.HorizontalAlignment.Center
myTextBlock.Text = "VerticalAlignment Sample"
Grid.SetRow(myTextBlock, 0)
Dim myButton1 As New Button()
myButton1.VerticalAlignment = Windows.VerticalAlignment.Top
myButton1.Content = "Button 1 (Top)"
Grid.SetRow(myButton1, 1)
Dim myButton2 As New Button()
myButton2.VerticalAlignment = Windows.VerticalAlignment.Bottom
myButton2.Content = "Button 2 (Bottom)"
Grid.SetRow(myButton2, 2)
Dim myButton3 As New Button()
myButton3.VerticalAlignment = Windows.VerticalAlignment.Center
myButton3.Content = "Button 3 (Center)"
Grid.SetRow(myButton3, 3)
Dim myButton4 As New Button()
myButton4.VerticalAlignment = Windows.VerticalAlignment.Stretch
myButton4.Content = "Button 4 (Stretch)"
Grid.SetRow(myButton4, 4)

<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
      WindowTitle="VerticalAlignment Sample">
  <Border Background="LightBlue" BorderBrush="Black" BorderThickness="2" Padding="15">
    <Grid Background="White" ShowGridLines="True">
      <Grid.RowDefinitions>
        <RowDefinition Height="25"/>
        <RowDefinition Height="50"/>
        <RowDefinition Height="50"/>
        <RowDefinition Height="50"/>
        <RowDefinition Height="50"/>
      </Grid.RowDefinitions>
            <TextBlock Grid.Row="0" Grid.Column="0" FontSize="18" HorizontalAlignment="Center">VerticalAlignment Sample</TextBlock>
            <Button Grid.Row="1" Grid.Column="0" VerticalAlignment="Top">Button 1 (Top)</Button>
            <Button Grid.Row="2" Grid.Column="0" VerticalAlignment="Bottom">Button 2 (Bottom)</Button>    
            <Button Grid.Row="3" Grid.Column="0" VerticalAlignment="Center">Button 3 (Center)</Button>
            <Button Grid.Row="4" Grid.Column="0" VerticalAlignment="Stretch">Button 4 (Stretch)</Button>          
    </Grid>
  </Border>    
</Page>

El código anterior produce un diseño similar al de la siguiente imagen. Los efectos de posicionamiento de cada valor VerticalAlignment se pueden ver en la ilustración.

Ejemplo de propiedad VerticalAlignment

Explicación de las propiedades Margin

La propiedad Margin describe la distancia entre un elemento y su elemento secundario o elemento del mismo nivel. Los valores Margin pueden ser uniformes, usando una sintaxis como Margin="20". Con esta sintaxis, se aplicaría una propiedad Margin uniforme de 20 píxeles independientes del dispositivo al elemento. Los valores Margin también pueden adoptar la forma de cuatro valores diferenciados que, individualmente, describen el margen diferenciado que hay que aplicar a la izquierda, a la parte superior, a la derecha y a la parte inferior (en ese orden), como Margin="0,10,5,25". El uso adecuado de la propiedad Margin permite controlar de manera muy precisa la posición de representación de un elemento y la posición de representación de sus elementos vecinos y secundarios.

Nota

Un margen distinto de cero aplica el espacio fuera de los ActualWidth y ActualHeight del elemento.

En el ejemplo siguiente se muestra cómo aplicar márgenes uniformes alrededor de un grupo de elementos Button. Los elementos Button se espacian uniformemente con un búfer de margen de diez píxeles en cada dirección.

Button^ myButton7 = gcnew Button();
myButton7->Margin = Thickness(10);
myButton7->Content = "Button 7";
Button^ myButton8 = gcnew Button();
myButton8->Margin = Thickness(10);
myButton8->Content = "Button 8";
Button^ myButton9 = gcnew Button();
myButton9->Margin = Thickness(10);
myButton9->Content = "Button 9";

Button myButton7 = new Button();
myButton7.Margin = new Thickness(10);
myButton7.Content = "Button 7";
Button myButton8 = new Button();
myButton8.Margin = new Thickness(10);
myButton8.Content = "Button 8";
Button myButton9 = new Button();
myButton9.Margin = new Thickness(10);
myButton9.Content = "Button 9";

Dim myButton7 As New Button
myButton7.Margin = New Thickness(10)
myButton7.Content = "Button 7"
Dim myButton8 As New Button
myButton8.Margin = New Thickness(10)
myButton8.Content = "Button 8"
Dim myButton9 As New Button
myButton9.Margin = New Thickness(10)
myButton9.Content = "Button 9"

<Button Margin="10">Button 7</Button>
<Button Margin="10">Button 8</Button>
<Button Margin="10">Button 9</Button>

En muchos casos, un margen uniforme no resulta apropiado. En estos casos, se puede aplicar un espaciado no uniforme. En el ejemplo siguiente se muestra cómo aplicar un espaciado de margen no uniforme a los elementos secundarios. Los márgenes se describen en este orden: izquierdo, superior, derecho e inferior.

Button^ myButton1 = gcnew Button();
myButton1->Margin = Thickness(0, 10, 0, 10);
myButton1->Content = "Button 1";
Button^ myButton2 = gcnew Button();
myButton2->Margin = Thickness(0, 10, 0, 10);
myButton2->Content = "Button 2";
Button^ myButton3 = gcnew Button();
myButton3->Margin = Thickness(0, 10, 0, 10);

Button myButton1 = new Button();
myButton1.Margin = new Thickness(0, 10, 0, 10);
myButton1.Content = "Button 1";
Button myButton2 = new Button();
myButton2.Margin = new Thickness(0, 10, 0, 10);
myButton2.Content = "Button 2";
Button myButton3 = new Button();
myButton3.Margin = new Thickness(0, 10, 0, 10);

Dim myButton1 As New Button
myButton1.Margin = New Thickness(0, 10, 0, 10)
myButton1.Content = "Button 1"
Dim myButton2 As New Button
myButton2.Margin = New Thickness(0, 10, 0, 10)
myButton2.Content = "Button 2"
Dim myButton3 As New Button
myButton3.Margin = New Thickness(0, 10, 0, 10)

<Button Margin="0,10,0,10">Button 1</Button>
<Button Margin="0,10,0,10">Button 2</Button>
<Button Margin="0,10,0,10">Button 3</Button>

Descripción de la propiedad Padding

El relleno es similar a Margin en la mayoría de los aspectos. La propiedad Padding se expone solo en algunas clases, principalmente por conveniencia: Block, Border, Control y TextBlock son ejemplos de clases que exponen la propiedad Padding. La propiedad Padding amplía el tamaño efectivo de un elemento secundario en el valor Thickness especificado.

El siguiente ejemplo muestra cómo aplicar Padding a un elemento primario Border.

myBorder = gcnew Border();
myBorder->Background = Brushes::LightBlue;
myBorder->BorderBrush = Brushes::Black;
myBorder->BorderThickness = Thickness(2);
myBorder->CornerRadius = CornerRadius(45);
myBorder->Padding = Thickness(25);

myBorder = new Border();
myBorder.Background = Brushes.LightBlue;
myBorder.BorderBrush = Brushes.Black;
myBorder.BorderThickness = new Thickness(2);
myBorder.CornerRadius = new CornerRadius(45);
myBorder.Padding = new Thickness(25);

Dim myBorder As New Border
myBorder.Background = Brushes.LightBlue
myBorder.BorderBrush = Brushes.Black
myBorder.BorderThickness = New Thickness(2)
myBorder.CornerRadius = New CornerRadius(45)
myBorder.Padding = New Thickness(25)

<Border Background="LightBlue" 
        BorderBrush="Black" 
        BorderThickness="2" 
        CornerRadius="45" 
        Padding="25">

Uso de las propiedades Alignment, Margin y Padding en una aplicación

HorizontalAlignment, Margin, Padding y VerticalAlignment proporcionan el control de posicionamiento necesario para crear una interfaz de usuario compleja (UI). Puede usar los efectos de cada propiedad para cambiar el posicionamiento de los elementos secundarios, lo que ofrece flexibilidad en la creación de aplicaciones dinámicas y experiencias de usuario.

En el ejemplo siguiente se muestra cada uno de los conceptos que se detallan en este tema. De acuerdo con la infraestructura del primer ejemplo de este tema, se agrega un elemento Grid como un elemento secundario de Border en el primer ejemplo. Padding se aplica al elemento primario Border. El Grid se utiliza para repartir el espacio entre tres elementos secundarios StackPanel. Los elementos Button se utilizan de nuevo para mostrar los distintos efectos de Margin y HorizontalAlignment. Se añaden elementos TextBlock a cada ColumnDefinition para definir mejor las distintas propiedades aplicadas a los elementos Button de cada columna.

mainWindow = gcnew Window();

myBorder = gcnew Border();
myBorder->Background = Brushes::LightBlue;
myBorder->BorderBrush = Brushes::Black;
myBorder->BorderThickness = Thickness(2);
myBorder->CornerRadius = CornerRadius(45);
myBorder->Padding = Thickness(25);

// Define the Grid.
myGrid = gcnew Grid();
myGrid->Background = Brushes::White;
myGrid->ShowGridLines = true;

// Define the Columns.
ColumnDefinition^ myColDef1 = gcnew ColumnDefinition();
myColDef1->Width = GridLength(1, GridUnitType::Auto);
ColumnDefinition^ myColDef2 = gcnew ColumnDefinition();
myColDef2->Width = GridLength(1, GridUnitType::Star);
ColumnDefinition^ myColDef3 = gcnew ColumnDefinition();
myColDef3->Width = GridLength(1, GridUnitType::Auto);

// Add the ColumnDefinitions to the Grid.
myGrid->ColumnDefinitions->Add(myColDef1);
myGrid->ColumnDefinitions->Add(myColDef2);
myGrid->ColumnDefinitions->Add(myColDef3);

// Add the first child StackPanel.
StackPanel^ myStackPanel = gcnew StackPanel();
myStackPanel->HorizontalAlignment = HorizontalAlignment::Left;
myStackPanel->VerticalAlignment = VerticalAlignment::Top;
Grid::SetColumn(myStackPanel, 0);
Grid::SetRow(myStackPanel, 0);
TextBlock^ myTextBlock1 = gcnew TextBlock();
myTextBlock1->FontSize = 18;
myTextBlock1->HorizontalAlignment = HorizontalAlignment::Center;
myTextBlock1->Margin = Thickness(0, 0, 0, 15);
myTextBlock1->Text = "StackPanel 1";
Button^ myButton1 = gcnew Button();
myButton1->Margin = Thickness(0, 10, 0, 10);
myButton1->Content = "Button 1";
Button^ myButton2 = gcnew Button();
myButton2->Margin = Thickness(0, 10, 0, 10);
myButton2->Content = "Button 2";
Button^ myButton3 = gcnew Button();
myButton3->Margin = Thickness(0, 10, 0, 10);
TextBlock^ myTextBlock2 = gcnew TextBlock();
myTextBlock2->Text = "ColumnDefinition.Width = \"Auto\"";
TextBlock^ myTextBlock3 = gcnew TextBlock();
myTextBlock3->Text = "StackPanel.HorizontalAlignment = \"Left\"";
TextBlock^ myTextBlock4 = gcnew TextBlock();
myTextBlock4->Text = "StackPanel.VerticalAlignment = \"Top\"";
TextBlock^ myTextBlock5 = gcnew TextBlock();
myTextBlock5->Text = "StackPanel.Orientation = \"Vertical\"";
TextBlock^ myTextBlock6 = gcnew TextBlock();
myTextBlock6->Text = "Button.Margin = \"1,10,0,10\"";
myStackPanel->Children->Add(myTextBlock1);
myStackPanel->Children->Add(myButton1);
myStackPanel->Children->Add(myButton2);
myStackPanel->Children->Add(myButton3);
myStackPanel->Children->Add(myTextBlock2);
myStackPanel->Children->Add(myTextBlock3);
myStackPanel->Children->Add(myTextBlock4);
myStackPanel->Children->Add(myTextBlock5);
myStackPanel->Children->Add(myTextBlock6);

// Add the second child StackPanel.
StackPanel^ myStackPanel2 = gcnew StackPanel();
myStackPanel2->HorizontalAlignment = HorizontalAlignment::Stretch;
myStackPanel2->VerticalAlignment = VerticalAlignment::Top;
myStackPanel2->Orientation = Orientation::Vertical;
Grid::SetColumn(myStackPanel2, 1);
Grid::SetRow(myStackPanel2, 0);
TextBlock^ myTextBlock7 = gcnew TextBlock();
myTextBlock7->FontSize = 18;
myTextBlock7->HorizontalAlignment = HorizontalAlignment::Center;
myTextBlock7->Margin = Thickness(0, 0, 0, 15);
myTextBlock7->Text = "StackPanel 2";
Button^ myButton4 = gcnew Button();
myButton4->Margin = Thickness(10, 0, 10, 0);
myButton4->Content = "Button 4";
Button^ myButton5 = gcnew Button();
myButton5->Margin = Thickness(10, 0, 10, 0);
myButton5->Content = "Button 5";
Button^ myButton6 = gcnew Button();
myButton6->Margin = Thickness(10, 0, 10, 0);
myButton6->Content = "Button 6";
TextBlock^ myTextBlock8 = gcnew TextBlock();
myTextBlock8->HorizontalAlignment = HorizontalAlignment::Center;
myTextBlock8->Text = "ColumnDefinition.Width = \"*\"";
TextBlock^ myTextBlock9 = gcnew TextBlock();
myTextBlock9->HorizontalAlignment = HorizontalAlignment::Center;
myTextBlock9->Text = "StackPanel.HorizontalAlignment = \"Stretch\"";
TextBlock^ myTextBlock10 = gcnew TextBlock();
myTextBlock10->HorizontalAlignment = HorizontalAlignment::Center;
myTextBlock10->Text = "StackPanel.VerticalAlignment = \"Top\"";
TextBlock^ myTextBlock11 = gcnew TextBlock();
myTextBlock11->HorizontalAlignment = HorizontalAlignment::Center;
myTextBlock11->Text = "StackPanel.Orientation = \"Vertical\"";
TextBlock^ myTextBlock12 = gcnew TextBlock();
myTextBlock12->HorizontalAlignment = HorizontalAlignment::Center;
myTextBlock12->Text = "Button.Margin = \"10,0,10,0\"";
myStackPanel2->Children->Add(myTextBlock7);
myStackPanel2->Children->Add(myButton4);
myStackPanel2->Children->Add(myButton5);
myStackPanel2->Children->Add(myButton6);
myStackPanel2->Children->Add(myTextBlock8);
myStackPanel2->Children->Add(myTextBlock9);
myStackPanel2->Children->Add(myTextBlock10);
myStackPanel2->Children->Add(myTextBlock11);
myStackPanel2->Children->Add(myTextBlock12);

// Add the final child StackPanel.
StackPanel^ myStackPanel3 = gcnew StackPanel();
myStackPanel3->HorizontalAlignment = HorizontalAlignment::Left;
myStackPanel3->VerticalAlignment = VerticalAlignment::Top;
Grid::SetColumn(myStackPanel3, 2);
Grid::SetRow(myStackPanel3, 0);
TextBlock^ myTextBlock13 = gcnew TextBlock();
myTextBlock13->FontSize = 18;
myTextBlock13->HorizontalAlignment = HorizontalAlignment::Center;
myTextBlock13->Margin = Thickness(0, 0, 0, 15);
myTextBlock13->Text = "StackPanel 3";
Button^ myButton7 = gcnew Button();
myButton7->Margin = Thickness(10);
myButton7->Content = "Button 7";
Button^ myButton8 = gcnew Button();
myButton8->Margin = Thickness(10);
myButton8->Content = "Button 8";
Button^ myButton9 = gcnew Button();
myButton9->Margin = Thickness(10);
myButton9->Content = "Button 9";
TextBlock^ myTextBlock14 = gcnew TextBlock();
myTextBlock14->Text = "ColumnDefinition.Width = \"Auto\"";
TextBlock^ myTextBlock15 = gcnew TextBlock();
myTextBlock15->Text = "StackPanel.HorizontalAlignment = \"Left\"";
TextBlock^ myTextBlock16 = gcnew TextBlock();
myTextBlock16->Text = "StackPanel.VerticalAlignment = \"Top\"";
TextBlock^ myTextBlock17 = gcnew TextBlock();
myTextBlock17->Text = "StackPanel.Orientation = \"Vertical\"";
TextBlock^ myTextBlock18 = gcnew TextBlock();
myTextBlock18->Text = "Button.Margin = \"10\"";
myStackPanel3->Children->Add(myTextBlock13);
myStackPanel3->Children->Add(myButton7);
myStackPanel3->Children->Add(myButton8);
myStackPanel3->Children->Add(myButton9);
myStackPanel3->Children->Add(myTextBlock14);
myStackPanel3->Children->Add(myTextBlock15);
myStackPanel3->Children->Add(myTextBlock16);
myStackPanel3->Children->Add(myTextBlock17);
myStackPanel3->Children->Add(myTextBlock18);

// Add child content to the parent Grid.
myGrid->Children->Add(myStackPanel);
myGrid->Children->Add(myStackPanel2);
myGrid->Children->Add(myStackPanel3);

// Add the Grid as the lone child of the Border.
myBorder->Child = myGrid;

// Add the Border to the Window as Content and show the Window.
mainWindow->Content = myBorder;
mainWindow->Title = "Margin, Padding, and Alignment Sample";
mainWindow->Show();

mainWindow = new Window();

myBorder = new Border();
myBorder.Background = Brushes.LightBlue;
myBorder.BorderBrush = Brushes.Black;
myBorder.BorderThickness = new Thickness(2);
myBorder.CornerRadius = new CornerRadius(45);
myBorder.Padding = new Thickness(25);

// Define the Grid.
myGrid = new Grid();
myGrid.Background = Brushes.White;
myGrid.ShowGridLines = true;

// Define the Columns.
ColumnDefinition myColDef1 = new ColumnDefinition();
myColDef1.Width = new GridLength(1, GridUnitType.Auto);
ColumnDefinition myColDef2 = new ColumnDefinition();
myColDef2.Width = new GridLength(1, GridUnitType.Star);
ColumnDefinition myColDef3 = new ColumnDefinition();
myColDef3.Width = new GridLength(1, GridUnitType.Auto);

// Add the ColumnDefinitions to the Grid.
myGrid.ColumnDefinitions.Add(myColDef1);
myGrid.ColumnDefinitions.Add(myColDef2);
myGrid.ColumnDefinitions.Add(myColDef3);

// Add the first child StackPanel.
StackPanel myStackPanel = new StackPanel();
myStackPanel.HorizontalAlignment = HorizontalAlignment.Left;
myStackPanel.VerticalAlignment = VerticalAlignment.Top;
Grid.SetColumn(myStackPanel, 0);
Grid.SetRow(myStackPanel, 0);
TextBlock myTextBlock1 = new TextBlock();
myTextBlock1.FontSize = 18;
myTextBlock1.HorizontalAlignment = HorizontalAlignment.Center;
myTextBlock1.Margin = new Thickness(0, 0, 0, 15);
myTextBlock1.Text = "StackPanel 1";
Button myButton1 = new Button();
myButton1.Margin = new Thickness(0, 10, 0, 10);
myButton1.Content = "Button 1";
Button myButton2 = new Button();
myButton2.Margin = new Thickness(0, 10, 0, 10);
myButton2.Content = "Button 2";
Button myButton3 = new Button();
myButton3.Margin = new Thickness(0, 10, 0, 10);
TextBlock myTextBlock2 = new TextBlock();
myTextBlock2.Text = @"ColumnDefinition.Width = ""Auto""";
TextBlock myTextBlock3 = new TextBlock();
myTextBlock3.Text = @"StackPanel.HorizontalAlignment = ""Left""";
TextBlock myTextBlock4 = new TextBlock();
myTextBlock4.Text = @"StackPanel.VerticalAlignment = ""Top""";
TextBlock myTextBlock5 = new TextBlock();
myTextBlock5.Text = @"StackPanel.Orientation = ""Vertical""";
TextBlock myTextBlock6 = new TextBlock();
myTextBlock6.Text = @"Button.Margin = ""1,10,0,10""";
myStackPanel.Children.Add(myTextBlock1);
myStackPanel.Children.Add(myButton1);
myStackPanel.Children.Add(myButton2);
myStackPanel.Children.Add(myButton3);
myStackPanel.Children.Add(myTextBlock2);
myStackPanel.Children.Add(myTextBlock3);
myStackPanel.Children.Add(myTextBlock4);
myStackPanel.Children.Add(myTextBlock5);
myStackPanel.Children.Add(myTextBlock6);

// Add the second child StackPanel.
StackPanel myStackPanel2 = new StackPanel();
myStackPanel2.HorizontalAlignment = HorizontalAlignment.Stretch;
myStackPanel2.VerticalAlignment = VerticalAlignment.Top;
myStackPanel2.Orientation = Orientation.Vertical;
Grid.SetColumn(myStackPanel2, 1);
Grid.SetRow(myStackPanel2, 0);
TextBlock myTextBlock7 = new TextBlock();
myTextBlock7.FontSize = 18;
myTextBlock7.HorizontalAlignment = HorizontalAlignment.Center;
myTextBlock7.Margin = new Thickness(0, 0, 0, 15);
myTextBlock7.Text = "StackPanel 2";
Button myButton4 = new Button();
myButton4.Margin = new Thickness(10, 0, 10, 0);
myButton4.Content = "Button 4";
Button myButton5 = new Button();
myButton5.Margin = new Thickness(10, 0, 10, 0);
myButton5.Content = "Button 5";
Button myButton6 = new Button();
myButton6.Margin = new Thickness(10, 0, 10, 0);
myButton6.Content = "Button 6";
TextBlock myTextBlock8 = new TextBlock();
myTextBlock8.HorizontalAlignment = HorizontalAlignment.Center;
myTextBlock8.Text = @"ColumnDefinition.Width = ""*""";
TextBlock myTextBlock9 = new TextBlock();
myTextBlock9.HorizontalAlignment = HorizontalAlignment.Center;
myTextBlock9.Text = @"StackPanel.HorizontalAlignment = ""Stretch""";
TextBlock myTextBlock10 = new TextBlock();
myTextBlock10.HorizontalAlignment = HorizontalAlignment.Center;
myTextBlock10.Text = @"StackPanel.VerticalAlignment = ""Top""";
TextBlock myTextBlock11 = new TextBlock();
myTextBlock11.HorizontalAlignment = HorizontalAlignment.Center;
myTextBlock11.Text = @"StackPanel.Orientation = ""Vertical""";
TextBlock myTextBlock12 = new TextBlock();
myTextBlock12.HorizontalAlignment = HorizontalAlignment.Center;
myTextBlock12.Text = @"Button.Margin = ""10,0,10,0""";
myStackPanel2.Children.Add(myTextBlock7);
myStackPanel2.Children.Add(myButton4);
myStackPanel2.Children.Add(myButton5);
myStackPanel2.Children.Add(myButton6);
myStackPanel2.Children.Add(myTextBlock8);
myStackPanel2.Children.Add(myTextBlock9);
myStackPanel2.Children.Add(myTextBlock10);
myStackPanel2.Children.Add(myTextBlock11);
myStackPanel2.Children.Add(myTextBlock12);

// Add the final child StackPanel.
StackPanel myStackPanel3 = new StackPanel();
myStackPanel3.HorizontalAlignment = HorizontalAlignment.Left;
myStackPanel3.VerticalAlignment = VerticalAlignment.Top;
Grid.SetColumn(myStackPanel3, 2);
Grid.SetRow(myStackPanel3, 0);
TextBlock myTextBlock13 = new TextBlock();
myTextBlock13.FontSize = 18;
myTextBlock13.HorizontalAlignment = HorizontalAlignment.Center;
myTextBlock13.Margin = new Thickness(0, 0, 0, 15);
myTextBlock13.Text = "StackPanel 3";
Button myButton7 = new Button();
myButton7.Margin = new Thickness(10);
myButton7.Content = "Button 7";
Button myButton8 = new Button();
myButton8.Margin = new Thickness(10);
myButton8.Content = "Button 8";
Button myButton9 = new Button();
myButton9.Margin = new Thickness(10);
myButton9.Content = "Button 9";
TextBlock myTextBlock14 = new TextBlock();
myTextBlock14.Text = @"ColumnDefinition.Width = ""Auto""";
TextBlock myTextBlock15 = new TextBlock();
myTextBlock15.Text = @"StackPanel.HorizontalAlignment = ""Left""";
TextBlock myTextBlock16 = new TextBlock();
myTextBlock16.Text = @"StackPanel.VerticalAlignment = ""Top""";
TextBlock myTextBlock17 = new TextBlock();
myTextBlock17.Text = @"StackPanel.Orientation = ""Vertical""";
TextBlock myTextBlock18 = new TextBlock();
myTextBlock18.Text = @"Button.Margin = ""10""";
myStackPanel3.Children.Add(myTextBlock13);
myStackPanel3.Children.Add(myButton7);
myStackPanel3.Children.Add(myButton8);
myStackPanel3.Children.Add(myButton9);
myStackPanel3.Children.Add(myTextBlock14);
myStackPanel3.Children.Add(myTextBlock15);
myStackPanel3.Children.Add(myTextBlock16);
myStackPanel3.Children.Add(myTextBlock17);
myStackPanel3.Children.Add(myTextBlock18);

// Add child content to the parent Grid.
myGrid.Children.Add(myStackPanel);
myGrid.Children.Add(myStackPanel2);
myGrid.Children.Add(myStackPanel3);

// Add the Grid as the lone child of the Border.
myBorder.Child = myGrid;

// Add the Border to the Window as Content and show the Window.
mainWindow.Content = myBorder;
mainWindow.Title = "Margin, Padding, and Alignment Sample";
mainWindow.Show();


Dim myBorder As New Border
myBorder.Background = Brushes.LightBlue
myBorder.BorderBrush = Brushes.Black
myBorder.BorderThickness = New Thickness(2)
myBorder.CornerRadius = New CornerRadius(45)
myBorder.Padding = New Thickness(25)

'Define the Grid.
Dim myGrid As New Grid
myGrid.Background = Brushes.White
myGrid.ShowGridLines = True

'Define the Columns.
Dim myColDef1 As New ColumnDefinition
myColDef1.Width = New GridLength(1, GridUnitType.Auto)
Dim myColDef2 As New ColumnDefinition
myColDef2.Width = New GridLength(1, GridUnitType.Star)
Dim myColDef3 As New ColumnDefinition
myColDef3.Width = New GridLength(1, GridUnitType.Auto)

'Add the ColumnDefinitions to the Grid
myGrid.ColumnDefinitions.Add(myColDef1)
myGrid.ColumnDefinitions.Add(myColDef2)
myGrid.ColumnDefinitions.Add(myColDef3)

'Add the first child StackPanel.
Dim myStackPanel As New StackPanel
myStackPanel.HorizontalAlignment = System.Windows.HorizontalAlignment.Left
myStackPanel.VerticalAlignment = System.Windows.VerticalAlignment.Top
Grid.SetColumn(myStackPanel, 0)
Grid.SetRow(myStackPanel, 0)
Dim myTextBlock1 As New TextBlock
myTextBlock1.FontSize = 18
myTextBlock1.HorizontalAlignment = System.Windows.HorizontalAlignment.Center
myTextBlock1.Margin = New Thickness(0, 0, 0, 15)
myTextBlock1.Text = "StackPanel 1"

Dim myButton1 As New Button
myButton1.Margin = New Thickness(0, 10, 0, 10)
myButton1.Content = "Button 1"
Dim myButton2 As New Button
myButton2.Margin = New Thickness(0, 10, 0, 10)
myButton2.Content = "Button 2"
Dim myButton3 As New Button
myButton3.Margin = New Thickness(0, 10, 0, 10)

Dim myTextBlock2 As New TextBlock
myTextBlock2.Text = "ColumnDefinition.Width = ""Auto"""
Dim myTextBlock3 As New TextBlock
myTextBlock3.Text = "StackPanel.HorizontalAlignment = ""Left"""
Dim myTextBlock4 As New TextBlock
myTextBlock4.Text = "StackPanel.VerticalAlignment = ""Top"""
Dim myTextBlock5 As New TextBlock
myTextBlock5.Text = "StackPanel.Orientation = ""Vertical"""
Dim myTextBlock6 As New TextBlock
myTextBlock6.Text = "Button.Margin = ""1,10,0,10"""
myStackPanel.Children.Add(myTextBlock1)
myStackPanel.Children.Add(myButton1)
myStackPanel.Children.Add(myButton2)
myStackPanel.Children.Add(myButton3)
myStackPanel.Children.Add(myTextBlock2)
myStackPanel.Children.Add(myTextBlock3)
myStackPanel.Children.Add(myTextBlock4)
myStackPanel.Children.Add(myTextBlock5)
myStackPanel.Children.Add(myTextBlock6)

'Add the second child StackPanel.
Dim myStackPanel2 As New StackPanel
myStackPanel2.HorizontalAlignment = System.Windows.HorizontalAlignment.Stretch
myStackPanel2.VerticalAlignment = System.Windows.VerticalAlignment.Top
myStackPanel2.Orientation = Orientation.Vertical
Grid.SetColumn(myStackPanel2, 1)
Grid.SetRow(myStackPanel2, 0)
Dim myTextBlock7 As New TextBlock
myTextBlock7.FontSize = 18
myTextBlock7.HorizontalAlignment = System.Windows.HorizontalAlignment.Center
myTextBlock7.Margin = New Thickness(0, 0, 0, 15)
myTextBlock7.Text = "StackPanel 2"
Dim myButton4 As New Button
myButton4.Margin = New Thickness(10, 0, 10, 0)
myButton4.Content = "Button 4"
Dim myButton5 As New Button
myButton5.Margin = New Thickness(10, 0, 10, 0)
myButton5.Content = "Button 5"
Dim myButton6 As New Button
myButton6.Margin = New Thickness(10, 0, 10, 0)
myButton6.Content = "Button 6"
Dim myTextBlock8 As New TextBlock
myTextBlock8.HorizontalAlignment = System.Windows.HorizontalAlignment.Center
myTextBlock8.Text = "ColumnDefinition.Width = ""*"""
Dim myTextBlock9 As New TextBlock
myTextBlock9.HorizontalAlignment = System.Windows.HorizontalAlignment.Center
myTextBlock9.Text = "StackPanel.HorizontalAlignment = ""Stretch"""
Dim myTextBlock10 As New TextBlock
myTextBlock10.HorizontalAlignment = System.Windows.HorizontalAlignment.Center
myTextBlock10.Text = "StackPanel.VerticalAlignment = ""Top"""
Dim myTextBlock11 As New TextBlock
myTextBlock11.HorizontalAlignment = System.Windows.HorizontalAlignment.Center
myTextBlock11.Text = "StackPanel.Orientation = ""Vertical"""
Dim myTextBlock12 As New TextBlock
myTextBlock12.HorizontalAlignment = System.Windows.HorizontalAlignment.Center
myTextBlock12.Text = "Button.Margin = ""10,0,10,0"""
myStackPanel2.Children.Add(myTextBlock7)
myStackPanel2.Children.Add(myButton4)
myStackPanel2.Children.Add(myButton5)
myStackPanel2.Children.Add(myButton6)
myStackPanel2.Children.Add(myTextBlock8)
myStackPanel2.Children.Add(myTextBlock9)
myStackPanel2.Children.Add(myTextBlock10)
myStackPanel2.Children.Add(myTextBlock11)
myStackPanel2.Children.Add(myTextBlock12)

'Add the final child StackPanel.
Dim myStackPanel3 As New StackPanel
myStackPanel3.HorizontalAlignment = System.Windows.HorizontalAlignment.Left
myStackPanel3.VerticalAlignment = System.Windows.VerticalAlignment.Top
Grid.SetColumn(myStackPanel3, 2)
Grid.SetRow(myStackPanel3, 0)
Dim myTextBlock13 As New TextBlock
myTextBlock13.FontSize = 18
myTextBlock13.HorizontalAlignment = System.Windows.HorizontalAlignment.Center
myTextBlock13.Margin = New Thickness(0, 0, 0, 15)
myTextBlock13.Text = "StackPanel 3"

Dim myButton7 As New Button
myButton7.Margin = New Thickness(10)
myButton7.Content = "Button 7"
Dim myButton8 As New Button
myButton8.Margin = New Thickness(10)
myButton8.Content = "Button 8"
Dim myButton9 As New Button
myButton9.Margin = New Thickness(10)
myButton9.Content = "Button 9"
Dim myTextBlock14 As New TextBlock
myTextBlock14.Text = "ColumnDefinition.Width = ""Auto"""
Dim myTextBlock15 As New TextBlock
myTextBlock15.Text = "StackPanel.HorizontalAlignment = ""Left"""
Dim myTextBlock16 As New TextBlock
myTextBlock16.Text = "StackPanel.VerticalAlignment = ""Top"""
Dim myTextBlock17 As New TextBlock
myTextBlock17.Text = "StackPanel.Orientation = ""Vertical"""
Dim myTextBlock18 As New TextBlock
myTextBlock18.Text = "Button.Margin = ""10"""
myStackPanel3.Children.Add(myTextBlock13)
myStackPanel3.Children.Add(myButton7)
myStackPanel3.Children.Add(myButton8)
myStackPanel3.Children.Add(myButton9)
myStackPanel3.Children.Add(myTextBlock14)
myStackPanel3.Children.Add(myTextBlock15)
myStackPanel3.Children.Add(myTextBlock16)
myStackPanel3.Children.Add(myTextBlock17)
myStackPanel3.Children.Add(myTextBlock18)

'Add child content to the parent Grid.
myGrid.Children.Add(myStackPanel)
myGrid.Children.Add(myStackPanel2)
myGrid.Children.Add(myStackPanel3)

'Add the Grid as the lone child of the Border.
myBorder.Child = myGrid


<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" WindowTitle="Margins, Padding and Alignment Sample">
  <Border Background="LightBlue" 
          BorderBrush="Black" 
          BorderThickness="2" 
          CornerRadius="45" 
          Padding="25">
    <Grid Background="White" ShowGridLines="True">
      <Grid.ColumnDefinitions>
        <ColumnDefinition Width="Auto"/>
        <ColumnDefinition Width="*"/>
        <ColumnDefinition Width="Auto"/>
      </Grid.ColumnDefinitions>
        
    <StackPanel Grid.Column="0" Grid.Row="0" HorizontalAlignment="Left" Name="StackPanel1" VerticalAlignment="Top">
        <TextBlock FontSize="18" HorizontalAlignment="Center" Margin="0,0,0,15">StackPanel1</TextBlock>
        <Button Margin="0,10,0,10">Button 1</Button>
        <Button Margin="0,10,0,10">Button 2</Button>
        <Button Margin="0,10,0,10">Button 3</Button>
        <TextBlock>ColumnDefinition.Width="Auto"</TextBlock>
        <TextBlock>StackPanel.HorizontalAlignment="Left"</TextBlock>
        <TextBlock>StackPanel.VerticalAlignment="Top"</TextBlock>
        <TextBlock>StackPanel.Orientation="Vertical"</TextBlock>
        <TextBlock>Button.Margin="0,10,0,10"</TextBlock>
    </StackPanel>
    
    <StackPanel Grid.Column="1" Grid.Row="0" HorizontalAlignment="Stretch" Name="StackPanel2" VerticalAlignment="Top" Orientation="Vertical">
        <TextBlock FontSize="18" HorizontalAlignment="Center" Margin="0,0,0,15">StackPanel2</TextBlock>
        <Button Margin="10,0,10,0">Button 4</Button>
        <Button Margin="10,0,10,0">Button 5</Button>
        <Button Margin="10,0,10,0">Button 6</Button>
        <TextBlock HorizontalAlignment="Center">ColumnDefinition.Width="*"</TextBlock>
        <TextBlock HorizontalAlignment="Center">StackPanel.HorizontalAlignment="Stretch"</TextBlock>
        <TextBlock HorizontalAlignment="Center">StackPanel.VerticalAlignment="Top"</TextBlock>
        <TextBlock HorizontalAlignment="Center">StackPanel.Orientation="Vertical"</TextBlock>
        <TextBlock HorizontalAlignment="Center">Button.Margin="10,0,10,0"</TextBlock>
    </StackPanel>        
        
    <StackPanel Grid.Column="2" Grid.Row="0" HorizontalAlignment="Left" Name="StackPanel3" VerticalAlignment="Top">
        <TextBlock FontSize="18" HorizontalAlignment="Center" Margin="0,0,0,15">StackPanel3</TextBlock>
        <Button Margin="10">Button 7</Button>
        <Button Margin="10">Button 8</Button>
        <Button Margin="10">Button 9</Button>
        <TextBlock>ColumnDefinition.Width="Auto"</TextBlock>
        <TextBlock>StackPanel.HorizontalAlignment="Left"</TextBlock>
        <TextBlock>StackPanel.VerticalAlignment="Top"</TextBlock>
        <TextBlock>StackPanel.Orientation="Vertical"</TextBlock>
        <TextBlock>Button.Margin="10"</TextBlock>      
    </StackPanel>
  </Grid>
  </Border>    
</Page>

Cuando se compila, la aplicación anterior produce una UI similar a la de la siguiente ilustración. Los efectos de los distintos valores de propiedad son evidentes en el espaciado entre los elementos y se muestran valores de propiedad significativos para los elementos de cada columna en los elementos TextBlock.

Varias propiedades de posicionamiento en una aplicación

Pasos siguientes

Las propiedades de posicionamiento que define la clase FrameworkElement permiten un control preciso de la ubicación de los elementos en las aplicaciones de WPF. Ahora dispone de varias técnicas que puede usar para posicionar mejor los elementos mediante WPF.

Existen recursos adicionales que explican el diseño de WPF con mayor detalle. El tema Información general sobre elementos Panel contiene más información sobre los distintos elementos Panel. El tema Tutorial: Mi primera aplicación de escritorio de WPF presenta técnicas avanzadas que usan elementos de diseño para posicionar componentes y enlazar sus acciones a orígenes de datos.

Vea también