仿照QQ好友分组的伸缩式菜单

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 QQ{ public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { listView1.Clear(); //清空ListView listView1.LargeImageList = imageList1; listView1.Items.Add("云山","云山",0); //添加显示图标 listView1.Items.Add("飞雪", "飞雪", 1); listView1.Items.Add("娇娇", "娇娇",2); listView1.Items.Add("天使", "天使", 3); } private void button1_Click(object sender, EventArgs e) { listView1.Dock = DockStyle.None; button1.Dock = DockStyle.Top; button2.Dock = DockStyle.Bottom; button3.SendToBack(); button3.Dock = DockStyle.Bottom; listView1.BringToFront(); listView1.Clear(); listView1.Items.Add("云山", "云山", 0); //添加显示图标 listView1.Items.Add("飞雪", "飞雪", 1); listView1.Items.Add("娇娇", "娇娇", 2); listView1.Items.Add("天使", "天使", 3); } private void button2_Click(object sender, EventArgs e) { listView1.Dock = DockStyle.None; button2.Dock = DockStyle.Top; button1.SendToBack(); button1.Dock = DockStyle.Top; button3.Dock = DockStyle.Bottom; listView1.Clear(); listView1.Items.Add("蝴蝶", "蝴蝶", 4); listView1.Items.Add("可人", "可人",5); } private void button3_Click(object sender, EventArgs e) { listView1.Dock = DockStyle.None; button3.SendToBack(); button3.Dock = DockStyle.Top; button2.SendToBack(); button2.Dock = DockStyle.Top; button1.SendToBack(); button1.Dock = DockStyle.Top; listView1.Dock = DockStyle.Bottom; listView1.Clear(); listView1.Items.Add("冰雨","冰雨",6); listView1.Items.Add("娇娇", "娇娇", 2); listView1.Items.Add("天使", "天使", 3); listView1.Items.Add("蝴蝶", "蝴蝶", 4); } }}