form1.cs

这是.net2005学习不可缺少的教程

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace DragDemo
{
	/// <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.AllowDrop = true;
			this.listBox1.ItemHeight = 12;
			this.listBox1.Items.AddRange(new object[] {
														  "111",
														  "222",
														  "3",
														  "4",
														  "5",
														  "6",
														  "7",
														  "8"});
			this.listBox1.Location = new System.Drawing.Point(16, 32);
			this.listBox1.Name = "listBox1";
			this.listBox1.Size = new System.Drawing.Size(160, 220);
			this.listBox1.TabIndex = 0;
			this.listBox1.MouseDown += new System.Windows.Forms.MouseEventHandler(this.listBox1_MouseDown);
			this.listBox1.DragEnter += new System.Windows.Forms.DragEventHandler(this.listBox1_DragEnter);
			// 
			// listBox2
			// 
			this.listBox2.AllowDrop = true;
			this.listBox2.ItemHeight = 12;
			this.listBox2.Location = new System.Drawing.Point(184, 32);
			this.listBox2.Name = "listBox2";
			this.listBox2.Size = new System.Drawing.Size(168, 220);
			this.listBox2.TabIndex = 1;
			this.listBox2.DragDrop += new System.Windows.Forms.DragEventHandler(this.listBox2_DragDrop);
			this.listBox2.DragEnter += new System.Windows.Forms.DragEventHandler(this.listBox2_DragEnter);
			// 
			// Form1
			// 
			this.AllowDrop = true;
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(400, 302);
			this.Controls.Add(this.listBox2);
			this.Controls.Add(this.listBox1);
			this.Name = "Form1";
			this.Text = "Form1";
			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 listBox1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
		{
			this.listBox1.DoDragDrop
(this.listBox1.Items[this.listBox1.SelectedIndex],DragDropEffects.Move);

		}

		private void listBox1_DragEnter(object sender, System.Windows.Forms.DragEventArgs e)
		{
			e.Effect=DragDropEffects.Move;
		}

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

		private void listBox2_DragDrop(object sender, System.Windows.Forms.DragEventArgs e)
		{
			this.listBox2.Items.Add(e.Data.GetData("Text"));

		}
	}
}