小编use*_*247的帖子

我正在为串口做一个项目..

我需要从组合框中选择可用的com端口.

但我无法得到它..我需要一些帮助〜

这是我的代码..它在C#中:

btn_Open是一个激活串口的按钮

    private void btnOpen_Click(object sender, EventArgs e)
    {
        string [] myPort;

        int COM1 = cbCommPorts.SelectedIndex;
        int COM2 = cbCommPorts.SelectedIndex;
        int COM3 = cbCommPorts.SelectedIndex;
        Object selectedItem = serialPort1.PortName;

        myPort = System.IO.Ports.SerialPort.GetPortNames();
        cbCommPorts.Items.AddRange(myPort);

        serialPort1.PortName = cbCommPorts.SelectedItem.ToString();
        serialPort1.BaudRate = 115200;

        if (serialPort1.IsOpen) {
            serialPort1.PortName = cbCommPorts.SelectedItem.ToString();

            serialPort1.Open();
            btnTransmit.Enabled = true;
            btn2.Enabled = true;
            btn3.Enabled = true;
        }

1. cbCommPorts是我为组合框得到的名字

   private void cbCommPorts_SelectedIndexChanged(object sender,EventArgs e){int COM1 = cbCommPorts.SelectedIndex; int COM2 = cbCommPorts.SelectedIndex; int COM3 = cbCommPorts.SelectedIndex; Object selectedItem = serialPort1.PortName;

       MessageBox.Show("COM …

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