C#拖放DragDrop 无法触发 急!!!

[sunny860]

在From内放了 两个控件 listBox1;和Listbox2
在Listbox内增加了几行数据

设置
listBox1.AllowDrop＝True
listBox2.AllowDrop＝True

代码如下:
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace DragDrop
{
/// <summary>
/// Form1 的摘要说明。
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.ListBox listBox1;
private System.Windows.Forms.ListBox listBox2;
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null;

public Form1()
{
//
// Windows 窗体设计器支持所必需的
//
InitializeComponent();

//
// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
//
}

/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}

#region Windows 窗体设计器生成的代码
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.listBox1 = new System.Windows.Forms.ListBox();
this.listBox2 = new System.Windows.Forms.ListBox();
this.SuspendLayout();
//
// listBox1
//
this.listBox1.ItemHeight = 12;
this.listBox1.Location = new System.Drawing.Point(32, 24);
this.listBox1.Name = "listBox1";
this.listBox1.Size = new System.Drawing.Size(120, 280);
this.listBox1.TabIndex = 0;
this.listBox1.MouseDown += new System.Windows.Forms.MouseEventHandler(this.listBox1_MouseDown);
//
// listBox2
//
this.listBox2.ItemHeight = 12;
this.listBox2.Location = new System.Drawing.Point(248, 24);
this.listBox2.Name = "listBox2";
this.listBox2.Size = new System.Drawing.Size(120, 280);
this.listBox2.TabIndex = 0;
this.listBox2.DragDrop += new System.Windows.Forms.DragEventHandler(this.listBox2_DragDrop);
this.listBox2.DragEnter += new System.Windows.Forms.DragEventHandler(this.listBox2_DragEnter);
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(408, 333);
this.Controls.Add(this.listBox1);
this.Controls.Add(this.listBox2);
this.Name = "Form1";
this.Text = "Form1";
this.Load += new System.EventHandler(this.Form1_Load);
this.ResumeLayout(false);

}
#endregion

/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
}

private void Form1_Load(object sender, System.EventArgs e)
{
this.listBox1.AllowDrop = true;
this.listBox2.AllowDrop = true;
this.listBox1.Items.Add("a");
this.listBox1.Items.Add("b");
this.listBox1.Items.Add("c");
}

private void listBox1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
{
this.listBox1.DoDragDrop(this.listBox1.Items[this.listBox1.SelectedIndex],DragDropEffects.Move);
}

private void listBox2_DragEnter(object sender, System.Windows.Forms.DragEventArgs e)
{
if(e.Data.GetDataPresent("Text"))
{
e.Effect = DragDropEffects.Move;
}
}

private void listBox2_DragDrop(object sender, System.Windows.Forms.DragEventArgs e)
{
this.listBox2.Items.Add(e.Data.GetData("Text"));
this.listBox1.Items.Remove(e.Data.GetData("Text"));
}
}
}
运行结果时 Drag的数据可以看到 就是 listBox2_DragDrop()事件,无法触发
请高手指点！！！ 急！！

[coolszy]

属性里的 allowDrop 有没有设置

[coolszy]

属性框里的allowDrop有没有设置

[sunny860]

有设置啊，就是不行。不知道问题出在什么地方。主要是无法触发panel_DragDrop()事件

[sunny860]

顶一下。。有没有帮帮我。。。在此谢过。。

[ICanUseThisID]

"Text"不是一个类型

private void listBox2_DragEnter(object sender, System.Windows.Forms.DragEventArgs e)
  {
  //if(e.Data.GetDataPresent("Text"))
  if(e.Data.GetDataPresent(typeof(object)))
  {
    e.Effect = DragDropEffects.Move;
  }
  }

  private void listBox2_DragDrop(object sender, System.Windows.Forms.DragEventArgs e)
  {
  this.listBox2.Items.Add(e.Data.GetData(typeof(object)));
  this.listBox1.Items.Remove(e.Data.GetData(typeof(object)));
  } 

[sunny860]

问题还不是出在这里啊,
private void listBox2_DragEnter(object sender, System.Windows.Forms.DragEventArgs e)
{
//if(e.Data.GetDataPresent("Text"))
//if(e.Data.GetDataPresent(typeof(object)))
//{
e.Effect = DragDropEffects.Move;//此语句有被执行.我就是注释以上的语句.也不是行啊.
//}
}
目前的问题是listBox2_DragDrop()函数永远无法被触发啊....

[孙晓军82]

this.listBox2.ItemDrag += new DragEventHandler(listBox2_itemDrag);

private void listBox2_itemDrag(object sender, ItemDragEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
listBox2.DoDragDrop(e.Item, DragDropEffects.Move);
}
}

[sunny860]

listBox无此消息ItemDrag ()

[pengchengwanli]

顶，怎么解决的？