/// <summary>
/// 判断是否已经打开
/// </summary>
/// <param name="printerName"></param>
/// <returns></returns>
private bool OpenPmj(out string printerName)
{
if (string.IsNullOrEmpty(comboBoxPmj.Text))
{
throw new Exception("喷码机端口不能为空");
}
//首先关闭原来的串口
if (null != _pmjSerialPort)
{
var portName = _pmjSerialPort.GetPortName();
//比较端口的名称，如果端口名称已经改变，就需要重新建立连接
if (!portName.Equals(comboBoxPmj.Text))
{
_pmjSerialPort.Close();
_pmjSerialPort = new PmjSerialPort(comboBoxPmj.Text, new PmjDataRecv());
}
}
//如果不存在的话，也需要重新建立
if (null == _pmjSerialPort)
{
_pmjSerialPort = new PmjSerialPort(comboBoxPmj.Text, new PmjDataRecv());
}
return(_pmjSerialPort.HasPrinter(out printerName));
}
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
try
{
//关闭串口
_pmjSerialPort?.Close();
//
_plcSerialPort?.Close();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}