c#串口自动扫描程序

加入一个定时器控件，双击定时器控件，加入以下代码，就可以实现串口自动扫描功能     private void timer1_Tick(object sender, EventArgs e)        {              string[] t = SerialPort.GetPortNames();             if (cc != t.Length)             {                 comboBox1.Items.Clear();             }              cc = t.Length;                       if (!serialPort1.IsOpen)             {                 foreach (string com in SerialPort.GetPortNames())                 {                     if (comboBox1.Items.Count < cc)                         comboBox1.Items.Add(com);                 }             }         }

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