在BackGroundWorker中运行方法并显示ProgressBar

Question

我想要的是当一些方法正在做一些任务时UI保持活跃,我想在进度条中显示工作的进度.

我有一个方法,一个BackGroundWorker和一个Progressbar.我想在BackGroundWorker开始运行时调用该方法并显示进度.该方法包含一个循环.因此,它可以报告进度.

那么,可以做些什么呢？

private void Form1_Load(object sender, EventArgs e)
{
    // TODO: This line of code loads data into the 'dataSet1.TBLMARKET' table. You can move, or remove it, as needed.
    myBGWorker.WorkerReportsProgress = true;
}

private void myBGWorker_DoWork(object sender, DoWorkEventArgs e)
{
    parseFiles();
}

private void myBGWorker_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
    myProgressBar.Value = e.ProgressPercentage;
}

private void myBGWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
    MessageBox.Show("Done");
}

private void parseButton_Click(object sender, EventArgs e)
{
    myBGWorker.RunWorkerAsync();
}

public void parseFiles()
{
  for()
  {
     //parsing
     myBGWorker.ReportProgress(...);
  }
}

但它不起作用.在Progressbar没有更新.MessageBox"完成" 后只显示一小部分进展.

Answer 1

而不是使用一个ParseFiles方法(应该依赖于myBGWorker)使用解析一个文件的循环和方法.在该循环中报告进度百分比:

private void parseButton_Click(object sender, EventArgs e)
{
    parseButton.Enabled = false;
    myBGWorker.RunWorkerAsync();
}

private void myBGWorker_DoWork(object sender, DoWorkEventArgs e)
{
   for(int i = 0; i < filesCount; i++)
   {  
       ParseSingleFile(); // pass filename here
       int percentage = (i + 1) * 100 / filesCount;
       myBGWorker.ReportProgress(percentage);
   }
}

void myBGWorker_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
    myProgressBar.Value = e.ProgressPercentage;
}

void myBGWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
    parseButton.Enabled = true;
    MessageBox.Show("Done");
}