[C#/WPF] DateTemplate 클래스 : FindName 메소드를 사용해 자식 객체 구하기

TestProject.zip

0.01MB

▶ StudentModel.cs

using System.Collections.Generic;

namespace TestProject
{
    /// <summary>
    /// 학생 모델
    /// </summary>
    public class StudentModel
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Property
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region ID - ID

        /// <summary>
        /// ID
        /// </summary>
        public int ID { get; set; }

        #endregion
        #region 성명 - NAME

        /// <summary>
        /// 성명
        /// </summary>
        public string NAME { get; set; }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Static
        //////////////////////////////////////////////////////////////////////////////// Public

        #region 학생 리스트 구하기 - GetStudentList(count)

        /// <summary>
        /// 학생 리스트 구하기
        /// </summary>
        /// <param name="count">ㅅ학생 수</param>
        /// <returns>학생 리스트</returns>
        public static List<StudentModel> GetStudentList(int count)
        {
            List<StudentModel> list = new List<StudentModel>();

            for(int i = 0; i < count; i++)
            {
                list.Add(new StudentModel { ID = i, NAME = $"학생{i}" });
            }

            return list;
        }

        #endregion
    }
}

 

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▶ 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="800"
    Height="600"
    Title="DateTemplat 클래스 : 자식 객체 구하기"
    FontFamily="나눔고딕코딩"
    FontSize="16">
    <Grid Margin="10">
        <Grid.RowDefinitions>
            <RowDefinition Height="*"    />
            <RowDefinition Height="10"   />
            <RowDefinition Height="Auto" />
        </Grid.RowDefinitions>
        <ListBox Name="listBox" Grid.Row="0">
            <ListBox.ItemTemplate>
                <DataTemplate>
                    <StackPanel Orientation="Horizontal">
                        <TextBlock Name="idTextBlock"
                            Foreground="Red"
                            TextAlignment="Right"
                            Text="{Binding ID}" />
                        <TextBlock Name="nameTextBlock"
                            Margin="20 0 0 0"
                            Foreground="Blue"
                            Text="{Binding NAME}" />
                    </StackPanel>
                </DataTemplate>
            </ListBox.ItemTemplate>
        </ListBox>
        <Button Name="button" Grid.Row="2"
            Width="100"
            Height="30"
            Content="테스트" />
    </Grid>
</Window>

 

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▶ MainWindow.xaml.cs

using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;

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

        #region 생성자 - MainWindow()

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

            this.listBox.ItemsSource = StudentModel.GetStudentList(10000);

            this.button.Click += button_Click;
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Private
        //////////////////////////////////////////////////////////////////////////////// Event

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

        /// <summary>
        /// 테스트 버튼 클릭시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void button_Click(object sender, RoutedEventArgs e)
        {
            ListBoxItem listBoxItem = this.listBox.ItemContainerGenerator.ContainerFromItem(this.listBox.SelectedItem) as ListBoxItem;

            if(listBoxItem == null)
            {
                return;
            }

            ContentPresenter contentPresenter = FindVisualChild<ContentPresenter>(listBoxItem);

            DataTemplate dataTemplate = contentPresenter.ContentTemplate;

            if(dataTemplate == null)
            {
                return;
            }

            TextBlock nameTextBlock = dataTemplate.FindName("nameTextBlock", contentPresenter) as TextBlock;

            if(nameTextBlock == null)
            {
                return;
            }

            nameTextBlock.Foreground = Brushes.DarkGreen;
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////// Event

        #region 비주얼 자식 구하기 - FindVisualChild<TChild>(parentObject)

        /// <summary>
        /// 비주얼 자식 구하기
        /// </summary>
        /// <typeparam name="TChild">자식 타입</typeparam>
        /// <param name="parentObject">부모 객체</param>
        /// <returns>비주얼 자식</returns>
        private TChild FindVisualChild<TChild>(DependencyObject parentObject) where TChild : DependencyObject
        {
            for(int i = 0; i < VisualTreeHelper.GetChildrenCount(parentObject); i++)
            {
                DependencyObject child = VisualTreeHelper.GetChild(parentObject, i);

                if(child != null && child is TChild)
                {
                    return (TChild)child;
                }
                else
                {
                    TChild grandChild = FindVisualChild<TChild>(child);

                    if(grandChild != null)
                    {
                        return grandChild;
                    }
                }
            }

            return null;
        }

        #endregion
    }
}