极度简易的抽奖、随机选择小工具

        //开始按钮
        private void btnCheckFiles_Click(object sender, EventArgs e)
        {
            this.timer1.Enabled = true;    //定时器开始运行
            this.timer1.Interval = 200;    //定时器每次运行间隔时间
        }

        //解析文件，存入List中
        int i = 0;
        public string returnName()
        {
            //string haarXmlPath = @"../../haarcascade_frontalface_alt_tree.txt";
            FileInfo file = new FileInfo("菜单.txt");   //获取Debug文件目录下的该文件
            List<string> list = ReadTextFileToList(file.Name);
            //List<string> list = ReadTextFileToList(@"F:2.txt");   绝对路径，如果该磁盘有限制将拒绝被访问

            string name = null;

            if (i < list.Count)
            {
                 name = list[i].ToString();
                 i++;
            }
            else
            {
                i = 0;
            }

            return name;

        }

        //文件解析
        public List<string> ReadTextFileToList(string fileName)
        {
            try
            {
                FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.Read);  //如果未在Debug目录下找到目标文件，将会报错
                List<string> list = new List<string>();
                StreamReader sr = new StreamReader(fs);  //读取文件中字符
                sr.BaseStream.Seek(0, SeekOrigin.Begin);
                string tmp = sr.ReadLine();
                while (tmp != null)
                {
                    list.Add(tmp);
                    tmp = sr.ReadLine();
                }
               
                sr.Close();
                fs.Close();  //释放资源，如果不关闭，此事资源被占用，第二次读取时会报错
                return list;
            }
            catch (Exception ex)
            {
                throw ex;   
            }
        }
        

        //定时器
        private void timer1_Tick(object sender, EventArgs e)
        {
                lbText.Text = returnName();
        }

        //停止按钮
        private void btnStop_Click(object sender, EventArgs e)
        {
            this.timer1.Stop();
            // this.txtStopName.Text = returnName();
            //lbText.Text = returnName();
        }