使用 winforms c# 更新进度条

Question

我的模块中有一个功能，用户可以 扫描系统中的串口数量，当 用户单击“自动扫描”按钮，代码将被删除 通过每个串口并发送测试消息并等待 以便回复。

我正在使用进度条控件来显示自动扫描的过程。 为此，我需要将代码中的值传递给“x”和“Y” 更新吧。由于我的代码已经是，我如何传递该值 在 foreach 循环中获取串行端口。

Y = 应传递串口总数的值 X = 应该迭代每个端口并传递值

希望我清楚 req.

 private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
    {
        string strAckData = "";

        foreach (SerialPort sp in comPortsList)
        {
            sp.Open();
            string sendData = "Auto scan";
            sp.Write(sendData);
            strAckData += "Connection live on port " + sp.ReadExisting() + "\n";
            sp.Close();

            double dIndex = (double)x; **//How to pass the value here ?**
            double dTotal = (double)y; **//How to pass the value here ?**
            double dProgressPercentage = (dIndex / dTotal);
            int iProgressPercentage = (int)(dProgressPercentage * 100);

            // update the progress bar
            backgroundWorker1.ReportProgress(iProgressPercentage);

        }
        richTextBox1.Invoke(new MethodInvoker(delegate { richTextBox1.Text = strAckData; }));
    }

    private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
    {
        ProgressBar.Value = e.ProgressPercentage;
    }

    private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
    {
        StatusLabel.Text = "Auto Scan completed";
    } 

Answer 1

您可以从 comPortsList 变量中获取端口数。那么索引只是递增循环变量的问题：

double dTotal = (double)(comPortsList.Count);
double dIndex = 0;

foreach (SerialPort sp in comPortsList)
{
  // talk to serial port as at the moment

  dIndex = dIndex + 1;  // or ++dIndex to be more concise
  double dProgressPercentage = dIndex / dTotal;
  // etc.
}