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

using System.ComponentModel

直接使用EgProgressBar方法

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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   }

传递方法参数RunWorkerAsync（参数）

获取方法   DoWorkEventArgs    的    e.Argument

结束时判定 Dowork方法  e.result   自动​传递到completed 的e.result 中

来自为知笔记(Wiz)