This example comes from the book Illustrated WPF starting on page 198, which is in chapter 8. Creating a binding with XAML is easy. To see what is going on, this example creates a binding in the code behind. It uses a label and a text box that sit on top of a stack panel. To do this, let’s build the window shown below. It contains a StackPanel with a Label at the top and a TextBox below it. Whatever text you type in the TextBox immediately shows in the Label above it, as well.

The markup for the window is the following. It’s very simple; it just specifies the creation of the Label and the TextBox and gives them names so they can be referenced from the code-behind.

<Window x:Class="BindingObjectinCodeBehind.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:BindingObjectinCodeBehind"
        mc:Ignorable="d"
        Title="Binding" Height="150" Width="225">
    <StackPanel>
        <Label Name="targetLabel"/>
        <TextBox Name="sourceTextBox"/>
    </StackPanel>
</Window>

using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;

namespace BindingObjectinCodeBehind
{
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();

            Binding myBinding = new Binding(); // Create the Binding
            myBinding.Source = sourceTextBox; // Set the Source (Name of the text box)
            myBinding.Path = new PropertyPath("Text"); // Set the Path
            // Connect the Source and the Target.
            targetLabel.SetBinding(Label.ContentProperty, myBinding);
        }
    }
}

• Create a new binding object
• Name of the source
• Property of the Source
• Attach it to the target (run SetBinding() method on target)