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Visão Geral sobre Alinhamento, Margens e Margens Internas

  • Artigo

The FrameworkElement class exposes several properties that are used to precisely position child elements. Este tópico aborda quatro das propriedades mais importantes: HorizontalAlignment, Margin, Padding, and VerticalAlignment. Os efeitos dessas propriedades são importantes para entender, pois eles fornecem a base para controlar a posição dos elementos em Windows Presentation Foundation (WPF) aplicativos.

Este tópico contém as seguintes seções.

  • Introduction to Element Positioning
  • Understanding Alignment Properties
  • Understanding Margin Properties
  • Understanding the Padding Property
  • Using Alignment, Margins, and Padding in an Application
  • What's Next
  • Tópicos relacionados

Introduction to Element Positioning

There are numerous ways to position elements using WPF. No entanto, alcançar o layout ideal vai além de simplesmente escolhendo o direito Panel elemento. Fine control of positioning requires an understanding of the HorizontalAlignment, Margin, Padding, and VerticalAlignment properties.

The following illustration shows a layout scenario that utilizes several positioning properties.

Exemplo de propriedades de posicionamento do WPF

At first glance, the Button elements in this illustration may appear to be placed randomly. However, their positions are actually precisely controlled by using a combination of margins, alignments, and padding.

The following example describes how to create the layout in the preceding illustration. A Border element encapsulates a parent StackPanel, with a Padding value of 15 device independent pixels. This accounts for the narrow LightBlue band that surrounds the child StackPanel. Child elements of the StackPanel are used to illustrate each of the various positioning properties that are detailed in this topic. Three Button elements are used to demonstrate both the Margin and HorizontalAlignment properties.

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


            // 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 ();


<Page xmlns="https://schemas.microsoft.com/winfx/2006/xaml/presentation" WindowTitle="Margins, Padding and Alignment Sample">
  <Border Background="LightBlue" BorderBrush="Black" BorderThickness="2" Padding="15">
    <StackPanel Background="White" HorizontalAlignment="Center" VerticalAlignment="Top">
        <TextBlock Margin="5,0,5,0" FontSize="18" HorizontalAlignment="Center">Alignment, Margin and Padding Sample</TextBlock>
        <Button HorizontalAlignment="Left" Margin="20">Button 1</Button>
        <Button HorizontalAlignment="Right" Margin="10">Button 2</Button>
        <Button HorizontalAlignment="Stretch" Margin="0">Button 3</Button>
    </StackPanel> 
  </Border>    
</Page>

The following diagram provides a close-up view of the various positioning properties that are used in the preceding sample. Subsequent sections in this topic describe in greater detail how to use each positioning property.

Propriedades de posicionamento texto explicativo na tela

Understanding Alignment Properties

The HorizontalAlignment and VerticalAlignment properties describe how a child element should be positioned within a parent element's allocated layout space. By using these properties together, you can position child elements precisely. Por exemplo, os elementos filho de um DockPanel pode especificar quatro diferentes alinhamentos de horizontais: Left, Right, ou Center, ou para Stretch para preencher o espaço disponível. Similar values are available for vertical positioning.

Observação

Explicitly-set Height and Width properties on an element take precedence over the Stretch property value.Attempting to set Height, Width, and a HorizontalAlignment value of Stretch results in the Stretch request being ignored.

HorizontalAlignment Property

The HorizontalAlignment property declares the horizontal alignment characteristics to apply to child elements. The following table shows each of the possible values of the HorizontalAlignment property.

Member

Description

Left

Child elements are aligned to the left of the parent element's allocated layout space.

Center

Child elements are aligned to the center of the parent element's allocated layout space.

Right

Child elements are aligned to the right of the parent element's allocated layout space.

Stretch (Default)

Child elements are stretched to fill the parent element's allocated layout space. Explicit Width and Height values take precedence.

The following example shows how to apply the HorizontalAlignment property to Button elements. Each attribute value is shown, to better illustrate the various rendering behaviors.

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)"

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)";

<Page xmlns="https://schemas.microsoft.com/winfx/2006/xaml/presentation" WindowTitle="HorizontalAlignment Sample">
  <Border Background="LightBlue" BorderBrush="Black" BorderThickness="2" Padding="15">
    <StackPanel Background="White" HorizontalAlignment="Center" VerticalAlignment="Top">
        <TextBlock Margin="5,0,5,0" FontSize="18" HorizontalAlignment="Center">HorizontalAlignment Sample</TextBlock>
    <Button HorizontalAlignment="Left">Button 1 (Left)</Button>
    <Button HorizontalAlignment="Right">Button 2 (Right)</Button>
    <Button HorizontalAlignment="Center">Button 3 (Center)</Button>
    <Button HorizontalAlignment="Stretch">Button 4 (Stretch)</Button>

    </StackPanel> 
  </Border>    
</Page>

The preceding code yields a layout similar to the following image. The positioning effects of each HorizontalAlignment value are visible in the illustration.

Exemplo de HorizontalAlignment

VerticalAlignment Property

The VerticalAlignment property describes the vertical alignment characteristics to apply to child elements. The following table shows each of the possible values for the VerticalAlignment property.

Member

Description

Top

Child elements are aligned to the top of the parent element's allocated layout space.

Center

Child elements are aligned to the center of the parent element's allocated layout space.

Bottom

Child elements are aligned to the bottom of the parent element's allocated layout space.

Stretch (Default)

Child elements are stretched to fill the parent element's allocated layout space. Explicit Width and Height values take precedence.

The following example shows how to apply the VerticalAlignment property to Button elements. Each attribute value is shown, to better illustrate the various rendering behaviors. For purposes of this sample, a Grid element with visible gridlines is used as the parent, to better illustrate the layout behavior of each property value.

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)

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);

<Page xmlns="https://schemas.microsoft.com/winfx/2006/xaml/presentation" 
      xmlns:x="https://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>

The preceding code yields a layout similar to the following image. The positioning effects of each VerticalAlignment value are visible in the illustration.

Exemplo da propriedade VerticalAlignment

Understanding Margin Properties

O Margin propriedade descreve a distância entre um elemento e seu filho ou colegas. Marginos valores podem ser uniformes, usando sintaxe como Margin="20". Com essa sintaxe, um uniforme de Margin de 20 pixels independentes de dispositivo seria aplicada ao elemento. Marginvalores também podem aproveitar o formulário de quatro valores distintos, cada valor descrevendo uma margem distinta para aplicar à esquerda, superior, direita e inferior (nessa ordem), como Margin="0,10,5,25". Proper use of the Margin property enables very fine control of an element's rendering position and the rendering position of its neighbor elements and children.

Observação

A non-zero margin applies space outside the element's ActualWidth and ActualHeight.

The following example shows how to apply uniform margins around a group of Button elements. O Button elementos são espaçados uniformemente com um buffer de margem de 10 pixels em cada direção.

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 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";

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

In many instances, a uniform margin is not appropriate. In these cases, non-uniform spacing can be applied. The following example shows how to apply non-uniform margin spacing to child elements. As margens são descritas nesta ordem: esquerda, superior, direita inferior.

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 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);

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 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>

Understanding the Padding Property

Padding is similar to Margin in most respects. A propriedade Padding é exposta somente em algumas classes, principalmente como uma conveniência: Block, Border, Control, e TextBlock são exemplos de classes que expõem uma propriedade Padding. The Padding property enlarges the effective size of a child element by the specified Thickness value.

The following example shows how to apply Padding to a parent Border element.

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)

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);

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

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

Using Alignment, Margins, and Padding in an Application

HorizontalAlignment, Margin, Padding, and VerticalAlignment provide the positioning control necessary to create a complex user interface (UI). You can use the effects of each property to change child-element positioning, enabling flexibility in creating dynamic applications and user experiences.

The following example demonstrates each of the concepts that are detailed in this topic. Aproveitando a infra-estrutura encontrada no primeiro exemplo neste tópico, este exemplo adiciona um Grid elemento como um filho de Border no primeiro exemplo. Paddingé aplicada ao pai do Border elemento. O Grid é usado para particionar o espaço entre o filho de três StackPanel elementos. Buttonelementos são novamente usados para mostrar os diversos efeitos do Margin e HorizontalAlignment. TextBlockos elementos são adicionados a cada ColumnDefinition para melhor definir as várias propriedades aplicadas para o Button elementos em cada coluna.


            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 = ""Horizontal"""
            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


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 = ""Horizontal""";
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();

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 = \"Horizontal\"";
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();

<Page xmlns="https://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="Horizontal"</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>

When compiled, the preceding application yields a UI that looks like the following illustration. Os efeitos dos vários valores de propriedade são evidentes no que o espaçamento entre elementos e valores de propriedade significativo para elementos em cada coluna são mostrados em TextBlock elementos.

Várias propriedades de posicionamento em um aplicativo

What's Next

Positioning properties defined by the FrameworkElement class enable fine control of element placement within WPF applications. Agora você tem várias técnicas que você pode usar para posicionar melhor os elementos usando WPF.

Additional resources are available that explain WPF layout in greater detail. The Panels Overview topic contains more detail about the various Panel elements. The topic Demonstra Passo a passo: Guia de Introdução do WPF introduces advanced techniques that use layout elements to position components and bind their actions to data sources.

Consulte também

Referência

FrameworkElement

HorizontalAlignment

VerticalAlignment

Margin

Conceitos

Panels Overview

Sistema de layout

Outros recursos

Exemplo de galeria de Layout do WPF