private void button1_Click(object sender, EventArgs e)
{
if (plc == null)
{
plc = new FormPLC();
plc.Show();
}
else
{
MessageBox.Show("已经打开PLC数据监听！");
}
}
private void Form1_Load(object sender, EventArgs e)
{
plc = new FormPLC();
plc.Show();
btn_close.Enabled = false;
tx_port.Text = "9009";
SetMsg("已开始服务！");
btn_start.Enabled = false;
btn_close.Enabled = true;
myThead = new Thread(new ThreadStart(BeginListen));
myTheadA = new Thread(new ThreadStart(BeginListenA));
myThead.Start();
myTheadA.Start();
}