[C#/WPF] 컨트롤 템플리트에서 컨트롤 객체 구하기

▶ MainWindow.xaml

<Window x:Class="TestProject.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Width="600"
    Height="450"
    Title="컨트롤 템플리트에서 컨트롤 객체 구하기">
    <Window.Resources>
        <ControlTemplate x:Key="ButtonControlTemplateKey" TargetType="Button">
            <Grid>
                <Rectangle x:Name="rectangle"
                    Stroke="Black"
                    StrokeThickness="3"
                    RadiusX="10"
                    RadiusY="10"
                    Fill="Orange">
                </Rectangle>
                <Viewbox
                    Margin="{TemplateBinding Padding}"
                    VerticalAlignment="Center"
                    HorizontalAlignment="Center">
                    <ContentPresenter />
                </Viewbox>
            </Grid>
        </ControlTemplate>
    </Window.Resources>  
    <Grid>
        <Button
            Name="button"
            HorizontalAlignment="Center"
            VerticalAlignment="Center"
            Width="280"
            Height="80"
            Template="{StaticResource ButtonControlTemplateKey}"
            Padding="10"
            Content="ChangeColor"
            Click="button_Click" />
    </Grid>
</Window>

 

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▶ MainWindow.xaml.cs

using System;
using System.Windows;
using System.Windows.Media;
using System.Windows.Shapes;

namespace TestProject
{
    /// <summary>
    /// 메인 윈도우
    /// </summary>
    public partial class MainWindow : Window
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - MainWindow()

        /// <summary>
        /// 생성자
        /// </summary>
        public MainWindow()
        {
            InitializeComponent();
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region 버튼 클릭시 처리하기 - button_Click(sender, e)

        /// <summary>
        /// 버튼 클릭시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void button_Click(object sender, RoutedEventArgs e)
        {
            try
            {
                Rectangle rectangle = this.button.Template.FindName("rectangle", button) as Rectangle;

                rectangle.Fill = Brushes.Red;
            }
            catch(Exception exception)
            {
                MessageBox.Show(exception.Message);   
            }
        }

        #endregion
    }
}

※ 테스트 결과 컨트롤이 로드되기 전에는 참조를 구할 수 없었다.