拖放listview C#

Question

您好,当我双击列表视图时,如何启用拖动事件处理程序？

这是双击列表视图后得到的结果

private void listView1(object sender, EventArgs e)

但是,我希望它是

private void listView(object sender,DragEventArgs e)

我该怎么做..？

我尝试了很多方法,例如:

  private void Form_Load(object sender, EventArgs e)
  {
      // Enable drag and drop for this form
      // (this can also be applied to any controls)
      this.AllowDrop = true;

      // Add event handlers for the drag & drop functionality
      this.DragEnter += new DragEventHandler(Form_DragEnter);
      this.DragDrop += new DragEventHandler(Form_DragDrop);
 }

Answer 1

您需要实现DragEnter事件并设置DragEventArgs的Effect属性.该dragEnter事件事件是什么让事情被投进控制.之后,释放鼠标按钮时将触发DragDrop事件.

这是一个允许将对象放入ListView的版本:

    private void Form1_Load(object sender, EventArgs e)
    {
        listView1.AllowDrop = true;
        listView1.DragDrop += new DragEventHandler(listView1_DragDrop);
        listView1.DragEnter += new DragEventHandler(listView1_DragEnter);
    }

    void listView1_DragEnter(object sender, DragEventArgs e)
    {
        e.Effect = DragDropEffects.Copy;
    }

    void listView1_DragDrop(object sender, DragEventArgs e)
    {
        listView1.Items.Add(e.Data.ToString());
    }

毫无疑问,您的示例代码取自:http://msdn.microsoft.com/en-us/library/system.windows.forms.control.allowdrop(v = vs.71).aspx