winform如何做出类似淘宝那种缩略图显示技术

[wzmlove007]

大家在浏览淘宝的时候当鼠标放在图片上面时，在右边会弹出图片的大图。
这个在网页程序中用一段js可以实现，可是如何在winform中实现这种功能，
或者是不是有什么控件可以实现这功能。

[exception92]

WPF 设置Image的toopTip 为放大后的图片。 或者 用devexpress 第三方。

[zbdzjx]

一个简单的例子：
1、如下图，放两个pictureBox，一个button，四个label。右边的pictureBox设定为隐藏。


2、代码如下：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace Test010
{
    public partial class Form1 : Form
    {
        string PicPath = @"C:\VS2012Test\Test010\Test010\images\img18.jpg";

        int RealWidth = 0;
        int RealHeight = 0;

        int ShowWidth = 0;
        int ShowHeight = 0;

        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            pictureBox1.Load(PicPath);

            Image pic = Image.FromFile(PicPath);
            RealWidth = pic.Width;
            RealHeight = pic.Height;

            ShowWidth = pictureBox1.Width;
            ShowHeight = pictureBox1.Height;
        }

        public Image AcquireRectangleImage(Image source, Rectangle rect)  //截取大图指定范围的小图
        {
            if (source == null || rect.IsEmpty) return null;
            Bitmap bmSmall = new Bitmap(rect.Width, rect.Height, System.Drawing.Imaging.PixelFormat.Format32bppRgb);

            using (Graphics grSmall = Graphics.FromImage(bmSmall))
            {
                grSmall.DrawImage(source, new System.Drawing.Rectangle(0, 0, bmSmall.Width, bmSmall.Height), rect, GraphicsUnit.Pixel);
                grSmall.Dispose();
            }
            return bmSmall;
        }

        private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
        {
            if (RealWidth > 0)
            {
                using (var pict = new PictureBox())
                {
                    int MouseX = e.X;
                    int MouseY = e.Y;
                    pict.Load(PicPath);
                    var im = AcquireRectangleImage(pict.Image, new Rectangle(MouseX * RealWidth / ShowWidth - pictureBox2.Width / 2, MouseY * RealHeight / ShowHeight - pictureBox2.Height / 2, pictureBox2.Width, pictureBox2.Height));
                    pictureBox2.Image = im;

                    label1.Text = MouseX.ToString();
                    label2.Text = MouseY.ToString();

                    label3.Text = (MouseX * RealWidth / ShowWidth - pictureBox2.Width / 2).ToString();
                    label4.Text = (MouseY * RealHeight / ShowHeight - pictureBox2.Height / 2).ToString();
                }
            }
        }

        private void pictureBox1_MouseEnter(object sender, EventArgs e)
        {
            pictureBox2.Show();
        }

        private void pictureBox1_MouseLeave(object sender, EventArgs e)
        {
            pictureBox2.Hide();
        }
    }
}