private void listView1_MouseMove(object sender, MouseEventArgs e)

       {

           ListView listview = sender as ListView;

           if (e.LeftButton == MouseButtonState.Pressed)

           {

               System.Collections.IList list = listview.SelectedItems as System.Collections.IList;

               DataObject data = new DataObject(typeof(System.Collections.IList), list);

               if (list.Count > )

               {

                   DragDrop.DoDragDrop(listview, data, DragDropEffects.Move);

               }

           }

       }  

       private void listView1_Drop(object sender, DragEventArgs e)

       {

           if (e.Data.GetDataPresent(typeof(System.Collections.IList)))

           {

               System.Collections.IList peopleList = e.Data.GetData(typeof(System.Collections.IList)) as System.Collections.IList;

               //index为放置时鼠标下元素项的索引

               int index = GetCurrentIndex(new GetPositionDelegate(e.GetPosition));

               if (index > -)

               {

                   LogMessage Logmess = peopleList[] as LogMessage;

                   //拖动元素集合的第一个元素索引

                   int OldFirstIndex = StreamHelper.List.IndexOf(Logmess);

                   //下边那个循环要求数据源必须为ObservableCollection<T>类型，T为对象

                   for (int i = ; i < peopleList.Count; i++)

                   {

                       StreamHelper.List.Move(OldFirstIndex, index);

                   }

                   listView1.SelectedItems.Clear();

               }

           }

       }  

       private int GetCurrentIndex(GetPositionDelegate getPosition)

       {

           int index = -;

           for (int i = ; i < listView1.Items.Count; ++i)

           {

               ListViewItem item = GetListViewItem(i);

               if (item != null && this.IsMouseOverTarget(item, getPosition))

               {

                   index = i;

                   break;

               }

           }

           return index;

       }  

       private bool IsMouseOverTarget(Visual target, GetPositionDelegate getPosition)

       {

           Rect bounds = VisualTreeHelper.GetDescendantBounds(target);

           Point mousePos = getPosition((IInputElement)target);

           return bounds.Contains(mousePos);

       }  

       delegate Point GetPositionDelegate(IInputElement element);  

       ListViewItem GetListViewItem(int index)

       {

           if (listView1.ItemContainerGenerator.Status != GeneratorStatus.ContainersGenerated)

               return null;

           return listView1.ItemContainerGenerator.ContainerFromIndex(index) as ListViewItem;

       }