这是 DoWork 事件、ProgressChanged 事件和 RunWorkerCompleted 事件的代码。问题是在函数处理操作结束之前,progressBar 的速度提高了 100%。因此,当progressBar 达到100% 时,我收到错误异常,因为progressBar 不能为101%

我需要以某种方式使progressBar 根据功能进程/进度获得进度。我猜我在 DoWork 事件中的计算有问题。

Form1 顶部我添加了:

Int i;

在构造函数中我做了:
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 FileStream 工作

现在我想向progressBar 添加一个标签,该标签将显示%,标签将根据progressBar 移动我不想禁用progressBar 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 不会只移动 % 更改为 1。我想看到类似 1%...2%...3%... 之类的东西。我该怎么做?

最佳答案

为什么不使用 File.ReadAllLines ,它返回一个字符串数组。您可以将您的进度报告为您正在处理的行占总行数的百分比:

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

关于c# - 我正在尝试使用 backgroundworker 但它不起作用 - 为什么?,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/10374469/

10-13 04:35