private void buttonOpenClose_Click(object sender, EventArgs e)
{
if (buttonOpenClose.Text == "关闭")
{
if (comm.IsOpen)
{
comm.Close();
}
buttonOpenClose.Text = "打开";
return;
}
//根据当前串口对象，来判断操作
if (comm == null)
{
//关闭时点击，则设置好端口，波特率后打开
comm.PortName = comboPortName.Text;
comm.BaudRate = int.Parse(comboBaudrate.Text);
comm.DataBits = 8;
comm.Parity = Parity.None;
comm.StopBits = StopBits.One;
comm.WriteBufferSize = 1024 * 1024 * 5;
comm.ReadBufferSize = 1024 * 1024 * 5;
try
{
comm.Open();
MessageBox.Show("串口已打开");
}
catch (Exception ex)
{
//捕获到异常信息，创建一个新的comm对象，之前的不能用了。
comm = new SerialPort();
//现实异常信息给客户。
MessageBox.Show(ex.Message);
}
}
else
{
if (comm.IsOpen)
{
while (CVar.GetCommBusy())
{
Application.DoEvents();
}
//打开时点击，则关闭串口
comm.Close();
MessageBox.Show("串口已关闭");
}
else
{
//关闭时点击，则设置好端口，波特率后打开
comm.PortName = comboPortName.Text;
comm.BaudRate = int.Parse(comboBaudrate.Text);
comm.DataBits = 8;
comm.Parity = Parity.Even;
comm.StopBits = StopBits.One;
comm.WriteBufferSize = 1024 * 1024 * 5;
comm.ReadBufferSize = 1024 * 1024 * 5;
try
{
comm.Open();
MessageBox.Show("串口已打开");
}
catch (Exception ex)
{
//捕获到异常信息，创建一个新的comm对象，之前的不能用了。
comm = new SerialPort();
//现实异常信息给客户。
MessageBox.Show(ex.Message);
}
}
}
//设置按钮的状态
buttonOpenClose.Text = comm.IsOpen ? "关闭" : "打开";
if (comm.IsOpen)
{
CommPara.portnum = comm.PortName;
CommPara.baudrate = comm.BaudRate;
CommPara.ParaWrite();
CVar.form1.button1.Text = CommPara.portnum.ToString() + "已打开";
comm.DataReceived += CVar.form1.comm_DataReceived;
}
}