XAML:

         
              
                   
        
         在控件中一次选择多个数据项：
                    
                        
         
          a
                         
         
          b
                         
         
          c
                         
         
          d
                         
         
          e
                     
                    
        
         在控件中使用Ctrl一次选择多个数据项：
                    
                        
                             
           
            
                          
                         
         
          张三
                         
         
          李四
                         
         
          王五
                         
         
          赵六
                         
         
          孙七
                     
                
           
      
     

C#:

using System;using System.Collections.Generic;using System.Linq;using System.Text;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 WpfApplication1{    /// 
    /// MainWindow.xaml 的交互逻辑    /// 
    public partial class MainWindow : Window    {        public MainWindow()        {            InitializeComponent();        }        private void btnShowSelectItems(object sender, RoutedEventArgs e)        {            string msg=string.Empty;            List
     
       list = new List
      
       ();            if (lbx.SelectedItems != null && lbx.SelectedItems.Count > 1)            {                //多选                foreach (ListBoxItem lbi in lbx.SelectedItems)                {                    list.Add(lbi.Content.ToString());                }                msg = string.Join(",", list);            }            else if (lbx.SelectedItems != null && lbx.SelectedItems.Count == 1)            {                //单选                msg = ((ListBoxItem)lbx.SelectedItem).Content.ToString();            }            else            {                //没有选中任何项            }            MessageBox.Show(msg);        }    }}
      
     

 

效果：