atzimler

[TestFixture]
public class LetsCheckTheEventHandlers
{
    [Test]
    public void ChainedEventHandlers()
    {
        var m = new MultiplyByTwo();
        var s = new CreateResultStars(m);
        Assert.AreEqual(string.Empty, s.Stars);

atzimler

<Window x:Class="Z10_BindingFromCode.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"
        mc:Ignorable="d"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="*"/>

atzimler

<Button x:Name="UpdateLabelButton" Grid.Row="1" Grid.Column="1">Update Label</Button>
<TextBlock x:Name="UpdatedLabel" Grid.Row="3" Grid.Column="1">Old Label Value</TextBlock>

atzimler

public static DependencyProperty LabelDataProperty = DependencyProperty.Register(nameof(LabelData), typeof(string), typeof(MainWindow), new PropertyMetadata("Old Label Value"));
public string LabelData
{
    get { return (string)GetValue(LabelDataProperty); }
    set { SetValue(LabelDataProperty, value); }
}

atzimler

var binding = new Binding(nameof(LabelData)) { Source = this, Mode = BindingMode.OneWay };
BindingOperations.SetBinding(UpdatedLabel, TextBlock.TextProperty, binding);

atzimler

public class LeftRightLayoutControl : StackPanel
{
    private Grid _grid;
    private StackPanel _left;
    private StackPanel _right;

    public LeftRightLayoutControl()
    {
        _grid = new Grid();
        _grid.RowDefinitions.Add(new RowDefinition { Height = new GridLength(1, GridUnitType.Star) });

atzimler

public enum Side
{
    None,
    Left,
    Right
}

atzimler

public static readonly DependencyProperty SideProperty = DependencyProperty.RegisterAttached(nameof(Side), typeof(Side), typeof(LeftRightLayoutControl), new PropertyMetadata(Side.None, UpdateSide));

public static Side GetSide(UIElement target)
{
    return (Side)target.GetValue(SideProperty);
}

public static void SetSide(UIElement target, Side value)
{
    target.SetValue(SideProperty, value);

atzimler

private static void UpdateSide(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
    var obj = (FrameworkElement)d;

    // Finding the LeftRightLayoutControl to which this object belongs to either directly or indirectly.
    var parent = LogicalTreeHelper.GetParent(obj);
    while (parent != null && parent.GetType() != typeof(LeftRightLayoutControl))
    {
        parent = LogicalTreeHelper.GetParent(parent);
    }

atzimler

<local:LeftRightLayoutControl>
    <Button local:LeftRightLayoutControl.Side="Left">On the left</Button>
    <Button local:LeftRightLayoutControl.Side="Right">On the right</Button>
    <Button local:LeftRightLayoutControl.Side="Left">On the left again</Button>
</local:LeftRightLayoutControl>