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  • 【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





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  • 原文地址:https://www.cnblogs.com/yzpopulation/p/4919066.html
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