Visual Studio/WPF > 컨트롤 > ListBox > SelectedItems 보기

Windows 7 Pro (32bit)
Microsoft Visual Studio 2017 Community
Sublime Text 2

<Window x:Class="_170426_t0650_listbox.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:_170426_t0650_listbox"
        mc:Ignorable="d"
        Title="MainWindow" Height="350" Width="525">
    <Grid Margin="0,1,0,-1">
        <StackPanel>
            <ListBox x:Name="listbox1" 
                     Height="250"
                     SelectionMode="Multiple">
                <ListBox.ItemTemplate>
                    <DataTemplate>
                        <TextBlock Text="{Binding Name}"/>
                    </DataTemplate>
                </ListBox.ItemTemplate>
            </ListBox>
            <Button x:Name="button1"  Height="40" Width="200" Content="Button1" Click="Button_Click"/>
        </StackPanel>
    </Grid>
</Window>

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 _170426_t0650_listbox
{
    /// <summary>
    /// MainWindow.xaml の相互作用ロジック
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();

            var data = new List<myList>();
            data.Add(new myList { Name = "List1" });
            data.Add(new myList { Name = "List2" });
            data.Add(new myList { Name = "List3" });
            data.Add(new myList { Name = "List4" });
            data.Add(new myList { Name = "List5" });
            listbox1.ItemsSource = data;
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            string msg = "";
            foreach(var elem in listbox1.SelectedItems)
            {
                myList alist = (myList)elem;
                msg = msg + "\r\n" + alist.Name;
            }
            MessageBox.Show(msg);

        }
    }

    public class myList
    {
        public string Name { get; set; }
    }
}