//控件事件调用DoWork()方法就行。
   
#region 进度条        private BackgroundWorker worker = null;        private void DoWork(string outfile)        {            //显示进度条            ProgressForm progressForm = new ProgressForm();            progressForm.TopMost = true;            progressForm.Show(this);            //准备进度条的记数            worker = new BackgroundWorker();            //指定提供进度通知            worker.WorkerReportsProgress = true;            //提供中断功能            worker.WorkerSupportsCancellation = true;            //线程的主要功能是处理事件            //开启线程执行工作            worker.DoWork += new DoWorkEventHandler(worker_DoWork);            // Specify the function to use to handle progress            //指定使用的功能来处理进度            worker.ProgressChanged += new ProgressChangedEventHandler(progressForm.OnProgressChanged);            worker.ProgressChanged += new ProgressChangedEventHandler(worker_ProgressChanged);            //进度条结束完成工作            //1.工作完成            //2.工作错误异常            //3.取消工作            worker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(progressForm.OnProcessCompleted);            worker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(worker_RunWorkerCompleted);            //如果进度条需要参数            //调用System.ComponentModel.BackgroundWorker.RunWorkerAsync            //传入你的参数至System.ComponentModel.BackgroundWorker.DoWork             //提取参数            //System.ComponentModel.DoWorkEventArgs.Argument             worker.RunWorkerAsync(outfile);        }        //单线程执行工作        private void worker_DoWork(object sender, DoWorkEventArgs e)        {            try            {                worker_Doing((BackgroundWorker)sender, e);            }            catch (Exception ex)            {
                //此处为异常处理，不能放到worker_Doing内部                e.Result = ex;            }        }        //进行工作        private void worker_Doing(BackgroundWorker worker, DoWorkEventArgs e)        {            string outfile = e.Argument as string; //传入参数            int count = 500;            for (int i = 0; i < count; i++)            {                //检查取消                if (worker.CancellationPending)                {                    e.Cancel = true;                    break;                }                else                {                    //此处为具体的工作代码
                    //...
                    //进度报告                    worker.ReportProgress((i + 1) * (100 / count), "进度信息");                    //线程休眠                    Thread.Sleep(500);                }            }        }                //进度报告        private void worker_ProgressChanged(object sender, ProgressChangedEventArgs e)        {            //此处可在窗口显示进度信息
            //e.UserState as string
            //...
        }        //工作完成状态        private void worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)        {            string message = "";            if (e.Error != null)            {                message = e.Error.Message;                MessageBox.Show(this, message, "异常");            }            else if (e.Cancelled)            {                message = "操作被取消。";                MessageBox.Show(this, message, "提示");            }            else            {                if (e.Result == null)                {                    message = "完成。";                    MessageBox.Show(this, message, "信息");                }                else                {                    message = (e.Result as Exception).Message;                    MessageBox.Show(this, message, "异常");                }            }            //此处代码为完成后的处理工作
            //...        }        #endregion