后台工作进度百分比

Question

我从列表<>添加字符串值列表框。我想计算ReportProgress进度百分比method.please帮我计算进度百分比。我在ReportProgress方法的第一个参数写0。我想和进度百分比，以取代0。

这里是我的代码。

private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
     List<string> result = new List<string>();
     var found = obj.getFiles();

     foreach (var item in found)
     {
         if (item.Contains("SFTP:") || item.Contains("ERROR:"))
         {
             result.Add(item);

             (sender as BackgroundWorker).ReportProgress(0, item);
         }
         else
             (sender as BackgroundWorker).ReportProgress(0);
         System.Threading.Thread.Sleep(1000);

     }
     e.Result = result;
}

private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
    if (e.UserState != null)
        listBox1.Items.Add(e.UserState);

    progressBar2.Value = e.ProgressPercentage;
}

Answer 1

的foreach不一定是这种应用的最佳迭代。使用一个for循环，并使用索引来计算基础上找到的大小的进展情况。

     for (int i = 0; i < found.Count; i++)
     {
         int progress = (int)(((float)(i + 1) / found.Count) * 100);
         if (found[i].Contains("SFTP:") || found[i].Contains("ERROR:"))
         {
             result.Add(found[i]);

             (sender as BackgroundWorker).ReportProgress(progress, found[i]);
         }
         else
             (sender as BackgroundWorker).ReportProgress(progress);
         System.Threading.Thread.Sleep(1000);    
     }