原创性申明

最近受朋友所托，需要做一个抽签的程序。我想应该也不难，就是随机嘛，这在c#里面也是相当容易的。于是就着手做了前后也就一小时。

我不善于做UI，界面很丑，请勿喷。

先展示一下程序界面

说一下布局，左边就是一个ListView 视图模式是大图标方式，这里注意下 因为要绑定一个imagelist 记得要修改下 imagelist里面图片显示的size，否则会图片很小。

流程是这样的：

添加好预选名单后点击开始，这时候就循环切换 listview的item的ImageIndex(使用两张图片，一张是选中一张未选中的)

这里切换item的图片是单独放在一个线程里面的，线程访问ListView必须使用委托来访问，否则会出错

跑马灯效果的实现，就是刚开始切换的时间长点，接下来时间越来越短，这里用的是Thread的sleep来做的

下面给出代码

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;
using System.Threading;
using System.IO;
using Brower;namespace Award
{public partial class Form1 : Form{public static string thinkshop = "";public static int NO_IMAGE = 4;public static int YES_IMAGE = 5;public Form1(){InitializeComponent();this.shoplist.View = View.LargeIcon;this.shoplist.LargeImageList = this.imageList1;timer1.Start();readload();load();//加载商家}private delegate void ListViewDelegate(int index);public void ChangeItem(int index){if (this.shoplist.InvokeRequired)//不能访问就创建委托{ListViewDelegate d = new ListViewDelegate(ChangeItem);shoplist.Invoke(d, new object[] { index });}else{ChangeIndex(index);}}//让index的item成为选中状态public void ChangeIndex(int index){//this.shoplist.BeginUpdate();for (int i = 0; i < shoplist.Items.Count; i++)//先把所有的item恢复原样{if (i != index){if (shoplist.Items[i].ImageIndex==YES_IMAGE)shoplist.Items[i].ImageIndex = NO_IMAGE;//设置为未选中样式}elseshoplist.Items[i].ImageIndex = YES_IMAGE;//设置为选中状态}//this.shoplist.EndUpdate();  //结束数据处理，UI界面一次性绘制。  }private void btn_add_Click(object sender, EventArgs e){if (txt_shopname.Text == ""){MessageBox.Show("不能为空!");return;}this.shoplist.BeginUpdate();ListViewItem lvi = new ListViewItem();lvi.ImageIndex = NO_IMAGE;lvi.Text = txt_shopname.Text;this.shoplist.Items.Add(lvi);this.shoplist.EndUpdate();  //结束数据处理，UI界面一次性绘制.txt_shopname.Text = "";l_shopnum.Text = shoplist.Items.Count.ToString(); }private delegate string ListViewItemDelegate(int index);//获取item的项值public string GetItem(int index){if (this.shoplist.InvokeRequired)//不能访问就创建委托{ListViewItemDelegate d = new ListViewItemDelegate(GetItem);return shoplist.Invoke(d, new object[] { index }).ToString();}else{if (shoplist.Items.Count > 0 && index < shoplist.Items.Count)return shoplist.Items[index].Text;else{return "error";}}}public bool flag = true;public void Effect(object result){int time = 900;while (flag){for (int j = 0; j < shoplist.Items.Count; j++){Thread.Sleep(time);if (time > 100)time -= 200;ChangeItem(j);}}for (int j = 0; j < shoplist.Items.Count; j++){Thread.Sleep(time);if (time < 900)time += 100;ChangeItem(j);//在最后一圈时停止圈后停止if (j == int.Parse(result.ToString())){ShowResult(int.Parse(result.ToString()));break;}}}private delegate void ResultDelegate(int index);public void ShowResult(int index){if (this.l_result.InvokeRequired)//不能访问就创建委托{ListViewDelegate d = new ListViewDelegate(ShowResult);l_result.Invoke(d, new object[] { index });}else{string shopname=GetItem(index);l_result.Text = "抽中是:" + shopname;}}public event EventHandler<EventArgs> GetResult;protected void OnGetResult(EventArgs e){if (GetResult != null)GetResult(this, e);}private void button1_Click(object sender, EventArgs e){if (shoplist.SelectedItems.Count > 0){int index=shoplist.SelectedItems[0].Index;shoplist.Items.RemoveAt(index);}}private void btn_start_Click(object sender, EventArgs e){flag = true;int num = -1;if (thinkshop != ""){for (int i = 0; i < shoplist.Items.Count; i++){string tmp = shoplist.Items[i].Text;if (tmp.Equals(thinkshop)){num = i;break;}}}if(num==-1){Random rd = new Random(DateTime.Now.Millisecond);num = rd.Next(shoplist.Items.Count);}new Thread(new ParameterizedThreadStart(Effect)).Start(num);btn_start.Enabled = false;btn_stop.Enabled = true;}private void button2_Click(object sender, EventArgs e){shoplist.Items.Clear();}private void btn_stop_Click(object sender, EventArgs e){btn_start.Enabled = true;btn_stop.Enabled = false;flag = false;}private void timer1_Tick(object sender, EventArgs e){l_time.Text = DateTime.Now.ToLongTimeString();}public void write(string msg){FileStream fs = new FileStream("t.dat", FileMode.Create);StreamWriter sw = new StreamWriter(fs, Encoding.UTF8);sw.Write(msg);sw.Close();fs.Close();}public void readload(){if (File.Exists("t.dat")){FileStream fs = new FileStream("t.dat", FileMode.Open, FileAccess.Read, FileShare.None);StreamReader sr = new StreamReader(fs, Encoding.UTF8);thinkshop = sr.ReadLine();sr.Close();fs.Close();}}//保存商家public void save(){FileStream fs = new FileStream("s.dat", FileMode.Create);StreamWriter sw = new StreamWriter(fs, Encoding.UTF8);for (int i = 0; i < shoplist.Items.Count; i++){sw.WriteLine(shoplist.Items[i].Text);}sw.Close();fs.Close();MessageBox.Show("保存成功!");}//加载商家public void load(){this.shoplist.BeginUpdate();if (File.Exists("s.dat")){FileStream fs = new FileStream("s.dat", FileMode.Open, FileAccess.Read, FileShare.None);StreamReader sr = new StreamReader(fs, Encoding.UTF8);string line = null;while ((line = sr.ReadLine()) != null){//自动加载文件中的商家名ListViewItem lvi = new ListViewItem();lvi.ImageIndex = NO_IMAGE;lvi.Text = line;this.shoplist.Items.Add(lvi);}sr.Close();fs.Close();}this.shoplist.EndUpdate();  //结束数据处理，UI界面一次性绘制.}private void Form1_Activated(object sender, EventArgs e){//注册热键Ctrl+F，Id号为101。HotKey.KeyModifiers.Ctrl也可以直接使用数字2来表示。HotKey.RegisterHotKey(Handle, 100, HotKey.KeyModifiers.Ctrl, Keys.F);HotKey.RegisterHotKey(Handle, 101, HotKey.KeyModifiers.Ctrl, Keys.S);HotKey.RegisterHotKey(Handle, 102, HotKey.KeyModifiers.Alt, Keys.Z);}private void Form1_Leave(object sender, EventArgs e){//注销Id号为100的热键设定   HotKey.UnregisterHotKey(Handle, 100);HotKey.UnregisterHotKey(Handle, 101);HotKey.UnregisterHotKey(Handle, 102);}//重载FromA中的WndProc函数  protected override void WndProc(ref Message m){const int WM_HOTKEY = 0x0312;//按快捷键   switch (m.Msg){case WM_HOTKEY:switch (m.WParam.ToInt32()){case 100:fshow();break;case 101:save();break;case 102:delete();break;}break;}base.WndProc(ref m);}public void delete(){thinkshop = "";if (File.Exists("t.dat"))File.Delete("t.dat");}public void fshow(){Form2 f = new Form2();f.ShowDialog();}}
}