WPF_Practice/PacticeSolution/ListBoxBindingSample/MainWindow.xaml.cs

using ListBoxBindingSample.Model;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace ListBoxBindingSample
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();

            InitInstance();
        }

        private void InitInstance()
        {
            List<Student> students = new List<Student>();
            students.Add(new Student() { Name = "Carl", Age = 23, Point = 100 });
            students.Add(new Student() { Name = "Jackson", Age = 35, Point = 80 });
            students.Add(new Student() { Name = "Philip", Age = 26, Point = 73 });
            students.Add(new Student() { Name = "Sarah", Age = 43, Point = 95 });

            lstMain.ItemsSource = students;
        }

        private void lstMain_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            if (lstMain.SelectedItem == null)
                return;

            tbxDisplay.Text = $"Selected student: {((Student)lstMain.SelectedItem).Name}";
        }

        private void btnSelected_Click(object sender, RoutedEventArgs e)
        {
            if (lstMain.SelectedItem == null)
            {
                MessageBox.Show("Please select a student.");
                return;
            }

            tbxDisplay.Text = $"Selected student: {((Student)lstMain.SelectedItem).Name}";
        }

        private void btnPrevStudent_Click(object sender, RoutedEventArgs e)
        {
            if (lstMain.SelectedItem == null)
                return;

            int index = lstMain.SelectedIndex - 1;
            if (index < 0)
                index = lstMain.Items.Count - 1;

            lstMain.SelectedIndex = index;
        }

        private void btnNextStudent_Click(object sender, RoutedEventArgs e)
        {
            if (lstMain.SelectedItem == null)
                return;

            int index = lstMain.SelectedIndex + 1;
            if (index >= lstMain.Items.Count)
                index = 0;

            lstMain.SelectedIndex = index;
        }

        private void btnAll_Click(object sender, RoutedEventArgs e)
        {
            lstMain.SelectAll();

            tbxDisplay.Clear();
            foreach (Student item in lstMain.SelectedItems)
            {
                tbxDisplay.Text += $"Selected student: {item.Name}{Environment.NewLine}";
            }
        }
    }
}