WPF中LISTITEM的拖拽

此方法较容易实现list中项的拖拽，不过其缺陷是无法将选中的ITEM取出来，SELECTED事件被MOUSELEFTBUTTONDOWN吃掉了。

不罗嗦了，以下是DEMO的源码：

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;
using System.Collections.ObjectModel;
using System.Collections;
namespace DragTest
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        ObservableCollection<string> obv = new ObservableCollection<string>();
        public MainWindow()
        {
            InitializeComponent();
            foreach (TimeZoneInfo tzi in TimeZoneInfo.GetSystemTimeZones())
            {
              lst1.Items.Add(tzi.ToString());
            }
           
        }
        ListView dragSource = null;
        private void lst1_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            ListView parent = (ListView)sender;
            dragSource = parent;
            object data = GetDataFromListBox(dragSource, e.GetPosition(parent));
            if (data != null)
            {
                
                DragDrop.DoDragDrop(parent, data, DragDropEffects.Copy);
            }
        }
        private static object GetDataFromListBox(ListBox source, Point point)
        {
            UIElement element = source.InputHitTest(point) as UIElement;
            if (element != null)
            {
                object data = DependencyProperty.UnsetValue;
                while (data == DependencyProperty.UnsetValue)
                {
                    data = source.ItemContainerGenerator.ItemFromContainer(element);
                    if (data == DependencyProperty.UnsetValue)
                    {
                        element = VisualTreeHelper.GetParent(element) as UIElement;
                    }
                    if (element == source)
                    {
                        return null;
                    }
                }
                if (data != DependencyProperty.UnsetValue)
                {
                    return data;
                }
            }
            return null;
        }
        //listbox1 to listbox2
        private void lst2_Drop(object sender, DragEventArgs e)
        {
            ListView parent = (ListView)sender;
            if (parent.Name == lst2.Name)
            {
                object data = e.Data.GetData(typeof(string));
                ((IList)dragSource.Items).Remove(data);
                if (!parent.Items.Contains(data))
                {
                    parent.Items.Add(data);
                }
            }
        }
        //listbox2 to listbox1
        private void lst1_Drop(object sender, DragEventArgs e)
        {
            
            ListView parent = (ListView)sender;
            if (parent.Name == lst1.Name)
            {
                object data = e.Data.GetData(typeof(string));
                ((IList)dragSource.Items).Remove(data);
                if (!parent.Items.Contains(data))
                {
                    parent.Items.Add(data);
                }
            }
        }
        private void lst2_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            ListView parent = (ListView)sender;
            dragSource = parent;
            object data = GetDataFromListBox(dragSource, e.GetPosition(parent));
            if (data != null)
            {
                DragDrop.DoDragDrop(parent, data, DragDropEffects.Move);
            }
        }

    }
}