【转】【C#利用后台动态加载数据】Winform“防界面卡死”【BackgroundWorker】类

        BackgroundWorker Bw = new BackgroundWorker();
        ListView listView1 = new ListView();
        public void EgProgressBar()
        {
            DirectoryInfo di = new DirectoryInfo(@"C:/Windows");
            FileInfo[] fi = di.GetFiles();
            progressBar1.Maximum = fi.Length - 1; //设置进度条的最大值
            Bw.WorkerSupportsCancellation = true;
            Bw.WorkerReportsProgress = true;
            Bw.DoWork += new DoWorkEventHandler(Add); //绑定事件
            Bw.ProgressChanged += new ProgressChangedEventHandler(Progress);
            Bw.RunWorkerCompleted += new RunWorkerCompletedEventHandler(End);
            Bw.RunWorkerAsync();
        }
        public void Add(object sender, DoWorkEventArgs e)
        {
            
            DirectoryInfo di = new DirectoryInfo(@"C:/Windows");
            foreach (FileInfo item in di.GetFiles())
            {
                ListViewItem lvt = new ListViewItem();//用listviewItem来存储获取到文件的信息
                lvt.Text = item.FullName;
                lvt.SubItems.Add(DateTime.Now.ToLongTimeString());
                Thread.Sleep(500);
               
                Bw.ReportProgress(listView1.Items.Count, lvt);//把当前的进度报告出去，获取到第几个文件和该文件的信息
            }

        }
        public void Progress(object sender, ProgressChangedEventArgs e)
        {
            progressBar1.Value = e.ProgressPercentage;//获取第几个文件，用来改变进度条的进度
            ListViewItem lv = e.UserState as ListViewItem;
            listView1.Items.Add(lv);//把最新获取到的文件信息添加到listview
        }
        public void End(object sender, RunWorkerCompletedEventArgs e)
      {
             progressBar1.Value = 0;//进度条清0
        }