Silverlight 拖动客户端文件 到ListBox

 
   
     
  void 
   MainPage_Loaded( 
  object 
   sender, RoutedEventArgs e)
        {
            listBox.AllowDrop  
  = 
    
  true 
  ;

            listBox.DragEnter  
  += 
    
  new 
   DragEventHandler(listBox_DragEnter);
            listBox.DragLeave  
  += 
    
  new 
   DragEventHandler(listBox_DragLeave);
            listBox.DragOver  
  += 
    
  new 
   DragEventHandler(listBox_DragOver);
            listBox.Drop  
  += 
    
  new 
   DragEventHandler(listBox_Drop);
        }

         
  void 
   listBox_DragEnter( 
  object 
   sender, DragEventArgs e)
        {
            listBox.Items.Add( 
  " 
  DragEnter 
  " 
  );
        }

         
  void 
   listBox_DragLeave( 
  object 
   sender, DragEventArgs e)
        {
            listBox.Items.Add( 
  " 
  DragLeave 
  " 
  );
        }

         
  void 
   listBox_DragOver( 
  object 
   sender, DragEventArgs e)
        {
             
  // 
   listBox.Items.Add("DragOver"); 
  
 
          }

         
  void 
   listBox_Drop( 
  object 
   sender, DragEventArgs e)
        {
            listBox.Items.Add( 
  " 
  Drop 
  " 
  );

             
  if 
   (e.Data  
  == 
    
  null 
  )
                 
  return 
  ;

            IDataObject dataObject  
  = 
   e.Data  
  as 
   IDataObject;
            FileInfo[] files  
  = 
   dataObject.GetData(DataFormats.FileDrop)  
  as 
   FileInfo[];

             
  foreach 
   (FileInfo file  
  in 
   files)
            {
                 
  if 
   (file.Exists)
                    listBox.Items.Add( 
  " 
  FileName:  
  " 
    
  + 
   file.Name  
  + 
    
  " 
   [FileSize:  
  " 
    
  + 
   file.Length  
  + 
    
  " 
  ] 
  " 
  );
                 
  else 
  
                    listBox.Items.Add( 
  " 
  文件无效 
  " 
  );
            }
        }