后台工作者进度百分比

Question

我正在将字符串值添加到 List<> 中的列表框。我想在 ReportProgress method.please 中计算进度百分比帮助我计算进度百分比。我在 ReportProgress 方法的第一个参数中写了 0。我想用进度百分比替换那个 0。

这是我的代码。

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

Foreach 不一定是此应用程序的最佳迭代。使用for循环并使用索引根据找到的大小计算进度。

     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);    
     }

后台工作者进度百分比

Background worker progress percentage

c#

winforms

progress-bar

backgroundworker