我正在尝试使用后台工作者，但它不起作用 - 为什么

这是DoWork事件、ProgressChanged事件和RunWorkerCompleted事件的代码。问题是进度条在函数进程操作结束之前达到 100% 的速度要快得多。因此，当进度条达到 100% 时，我收到错误异常，因为进度条不能为 101%

我需要以某种方式使进度条将根据功能过程/进度获得进度。我想我在DoWork事件中的计算有问题。

在Form1顶部，我添加了：

Int i;

在构造函数中，我做到了：

i = 0;
backgroundWorker1.WorkerSupportsCancellation = true;
backgroundWorker1.WorkerReportsProgress = true;
backgroundWorker1.RunWorkerAsync();

这是Backgroundworker的事件：

private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
   BackgroundWorker worker = sender as BackgroundWorker;
   //int currentLength;
   //int currentIndex;
   //int lastIndex = 0;
   string startTag = "T256='"";
   string endTag = "'"";
   int startTagWidth = startTag.Length;
   //int endTagWidth = endTag.Length;
   int index = 0;
   h = new StreamReader(@"d:'DeponiaSplit'testingdeponias_Translated.txt");
   while ((line = h.ReadLine()) != null)
   {
      if (index > f.LastIndexOf(startTag))
      {
         break;
      }
      int startTagIndex = f.IndexOf(startTag, index);
      int stringIndex = startTagIndex + startTagWidth;
      index = stringIndex;
      int endTagIndex = f.IndexOf(endTag, index);
      int stringLength = endTagIndex - stringIndex;
      if (stringLength != 0)
      {
         string test = f.Substring(stringIndex, stringLength);
         f = f.Substring(0, stringIndex) + line + f.Substring(stringIndex + stringLength);
         if (listBox1.InvokeRequired)
         {
            textBox1.Invoke(new MethodInvoker(delegate { textBox1.Text = line; }));
         }
         i = i + 1;
         System.Threading.Thread.Sleep(500);
         worker.ReportProgress((i * 1));
      }
   }
   h.Close();
   StreamWriter w = new StreamWriter(@"D:'New folder (24)'000004aa.xml");
   w.AutoFlush = true;
   w.Write(f);
   w.Close();
}
private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
    //this.progressBar1.Text = (e.ProgressPercentage.ToString() + "%");
    progressBar1.Value = e.ProgressPercentage;
}
private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
   if ((e.Cancelled == true))
   {
      this.progressBar1.Text = "Canceled!";
   }
   else if (!(e.Error == null))
   {
      this.progressBar1.Text = ("Error: " + e.Error.Message);
   } 
   else
   {
       this.progressBar1.Text = "Done!";
   }
}

为什么它不能正常工作？

使用文件流工作

现在我想向进度条添加一个标签，该标签将显示%并且标签将根据进度条移动，我不想禁用进度条绿色进度只是为了添加%并以百分比显示数字。

所以在ProgressChanged事件中，我做到了：

private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
    progressBar1.Value = e.ProgressPercentage;
    label3.Text = (e.ProgressPercentage.ToString() + "%");
} 

但它不起作用 - label13不会仅将百分比更改为 1。我想看到类似 1%...2%...3%...等等。我该怎么做？

string[] lines = File.ReadAllLines(@"d:'DeponiaSplit'testingdeponias_Translated.txt"); 
// ...
worker.ReportProgress(i * 100 / lines.Length);