ICODEBROKER

<Window x:Class="TestProject.MainWindow"

    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

    Width="800"

    Height="600"

    Title="DependencyPropertyDescriptor 클래스 : AddValueChanged 메소드를 사용해 의존 속성 값 변경시 통지하기"

    FontFamily="나눔고딕코딩"

    FontSize="16">

    <Grid>

        <StackPanel

            HorizontalAlignment="Center"

            VerticalAlignment="Center">

            <TextBox Name="textBox"

                Width="200"

                Height="25"

                VerticalContentAlignment="Center" />

            <TextBlock Name="textBlock"

                Margin="0 10 0 0" />

        </StackPanel>

    </Grid>

</Window>

using System;

using System.ComponentModel;

using System.Windows;

using System.Windows.Controls;

namespace TestProject

{

    /// <summary>

    /// 메인 윈도우

    /// </summary>

    public partial class MainWindow : Window

    {

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - MainWindow()

        /// <summary>

        /// 생성자

        /// </summary>

        public MainWindow()

        {

            InitializeComponent();

            Loaded   += Window_Loaded;

            Unloaded += Window_Unloaded;

        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method

        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region 윈도우 로드시 처리하기 - Window_Loaded(sender, e)

        /// <summary>

        /// 윈도우 로드시 처리하기

        /// </summary>

        /// <param name="sender">이벤트 발생자</param>

        /// <param name="e">이벤트 인자</param>

        private void Window_Loaded(object sender, RoutedEventArgs e)

        {

            DependencyPropertyDescriptor descriptor = DependencyPropertyDescriptor.FromProperty

            (

                TextBox.TextProperty,

                typeof(TextBox)

            );

            if(descriptor == null)

            {

                return;

            }

            descriptor.AddValueChanged(this.textBox, textBox_TextChanged);

        }

        #endregion

        #region 윈도우 언로드시 처리하기 - Window_Unloaded(sender, e)

        /// <summary>

        /// 윈도우 언로드시 처리하기

        /// </summary>

        /// <param name="sender">이벤트 발생자</param>

        /// <param name="e">이벤트 인자</param>

        private void Window_Unloaded(object sender, RoutedEventArgs e)

        {

            DependencyPropertyDescriptor descriptor = DependencyPropertyDescriptor.FromProperty

            (

                TextBox.TextProperty,

                typeof(TextBox)

            );

            if(descriptor == null)

            {

                return;

            }

            descriptor.RemoveValueChanged(this.textBox, textBox_TextChanged);

        }

        #endregion

        #region 텍스트 박스 텍스트 변경시 처리하기 - textBox_TextChanged(sender, e)

        /// <summary>

        /// 텍스트 박스 텍스트 변경시 처리하기

        /// </summary>

        /// <param name="sender">이벤트 발생자</param>

        /// <param name="e">이벤트 인자</param>

        private void textBox_TextChanged(object sender, EventArgs e)

        {

            TextBox textBox = sender as TextBox;

            this.textBlock.Text = textBox.Text;

        }

        #endregion

    }

}