XML Namespaces

<Window x:Class="MyNamespace.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:MyNamespace"
        mc:Ignorable="d">

Useful properties

Propriété	Valeur
WindowStyle	None ToolWindow SingleBorderWindow (default) ThreeDBorderWindow
ResizeMode	NoResize
SizeToContent	WidthAndHeight
WindowStartupLocation	CenterOwner
Title	Mon Titre

Design properties

<Window d:Height="450"
        d:Width="800"
        d:DataContext="{d:DesignInstance local:MainWindowViewModel}">

Événement Closed vs Closing

Closing est appelé juste après la méthode Window.Close().
La gestion de l’événement Closing permet d’annuler la fermeture de la fenêtre.

void Window_Closing(object sender, CancelEventArgs e)
{
    e.Cancel = true;

Closed est lui appelé juste avant que le fenêtre ne se ferme.

Maximiser une fenêtre

<Window WindowState="Maximized">

Application.Current.MainWindow.WindowState = WindowState.Maximized;

Héritage de fenêtre

Ici Window1 hérite de WindowBase, cela n'est possible que si WindowsBase ne contient pas de XAML.

namespace Vues
{
    public class WindowBase : Window { ... }
    public class Window1 : WindowBase { ... }
}

<vues:WindowBase x:Class="Vues.Windows1"
                 xmlns:vues="clr-namespace:Vues">

Open a child window

MainWindow.xaml

<Button Command="{Binding OpenCommand}" />

MainWindowViewModel.cs

public ICommand OpenCommand { get; set; }

public MainWindowViewModel()
{
    OpenCommand = new DelegateCommand(this.Open);
}

private void Open()
{
    var childWindow = new ChildWindow();
    var childWindowReturnedValue = childWindow.ShowDialog();
}

ChildWindow.xaml

<Window x:Class="WpfApp1.ChildWindow"
        x:Name="Window">

    <DockPanel HorizontalAlignment="Center">

        <StackPanel Orientation="Horizontal"
                    DockPanel.Dock="Bottom">
            <!-- IsDefault="True" makes the focus on the button, so press enter makes the button click -->
            <Button Content="Ok"
                    IsDefault="True"
                    Command="{Binding OkCommand}"
                    CommandParameter="{Binding ElementName=Window} "/> 
            <Button Content="Cancel"
                    IsCancel="True" /> <!-- IsCancel="True" makes the button close the window when clicked and return false -->
        </StackPanel>

        <TextBlock>
            Some text ...
        </TextBlock>

ChildWindowViewModel.cs

public ICommand OkCommand { get; set; }

public ChildWindowViewModel()
{
    OkCommand = new DelegateCommand<Window>(this.Ok);
}

private void Ok(Window window)
{
    // set a value to DialogResult to close the window
    window.DialogResult = true;
}

Code-behind

// depuis le code behind
var childWindow = new Window() { Owner = this };  // définir la fenêtre courante comme parente
childWindow.Height = 100; childWindow.Width = 50;
var stackPanel = new StackPanel();

var button = new Button();
button.Content = "Ok";
// le bouton de validation est celui qui possède la propriété IsDefault à true
button.IsDefault = true;
button.Click += (_sender, _e) => { window.DialogResult = true; window.Close(); };
stackPanel.Children.Add(button);

childWindow.Content = stackPanel;
// définit la position de la fenêtre
childWindow.WindowStartupLocation = WindowStartupLocation.CenterScreen;
childWindow.ShowDialog();

Renvoit la window contenant le UserControl

// renvoit la window contenant le UserControl
Window.GetWindow(monUserControl);

Padding

Ajouter une border transparente fait office de padding.

<Window>
    <Border BorderThickness="4" BorderBrush="Transparent">