本文实例为大家分享了c#基于serialport类实现串口通讯的具体代码，供大家参考，具体内容如下
最终效果
窗体设置：
using system;
using system.collections.generic;
using system.componentmodel;
using system.data;
using system.drawing;
using system.linq;
using system.text;
using system.threading.tasks;
using system.io.ports;
using system.threading;
using system.windows.forms;
namespace serialcommunication
{
public partial class form1 : form
{
system.threading.synchronizationcontext m_synccontext = null;
serialport serialport = null;
tohexadecimalstring tohexadecimalstring = new tohexadecimalstring();
public form1()
{
m_synccontext = synchronizationcontext.current;
initializecomponent();
}
//data initialization
private void form1_load(object sender, eventargs e)
{
string[] ports = serialport.getportnames();
serialportnumber.items.addrange(ports);
serialportnumber.selectedindex = serialportnumber.items.count > 0 ? 0 : -1;
baudratecom.text = "9600"; //set parameters
checkbitcom.text = "none";
databitcom.text = "8";
stopbitcom.text = "one";
}
//send data
private void send_click(object sender, eventargs e)
{
try
{
//send data and handle exceptions
byte[] bytes = new byte[sendmessage.text.length];
bytes = encoding.default.getbytes(sendmessage.text);
serialport.write(bytes, 0, bytes.length);
}
catch (exception error)
{
messagebox.show(error.message);
}
}
// byte to hexadecimal string
//clear data
private void clear_click(object sender, eventargs e)
{
receivemessage.text = "";
}
private void open_click(object sender, eventargs e)
{
string portname = serialportnumber.text;
int buadrate = int.parse(baudratecom.text);
parity parity = 0;
switch (checkbitcom.text)
{
case "none":
parity = parity.none; break;
case "odd":
parity = parity.odd; break;
case "even":
parity = parity.even; break;
case "mark":
parity = parity.mark; break;
case "space":
parity = parity.space; break;
}
int databit = int.parse(databitcom.text);
stopbits stopbits = 0;
switch (stopbitcom.text)
{
case "none":
stopbits = stopbits.none; break;
case "one":
stopbits = stopbits.one; break;
case "tow":
stopbits = stopbits.two; break;
case "onepointfive":
stopbits = stopbits.onepointfive; break;
}
try
{
if (open.text == "open")
{
serialport = new serialport(portname, buadrate, parity, databit, stopbits);
serialport.open();
open.text = "close";
}
else if (open.text == "close")
{
serialport.close();
open.text = "open";
}
}
catch (exception errror)
{
messagebox.show(errror.message);
}
serialport.datareceived = ondatareceived;
}
private void ondatareceived(object sender, serialdatareceivedeventargs e)
{
try
{
byte[] bytes = new byte[serialport.bytestoread];
serialport.read(bytes, 0, serialport.bytestoread);
m_synccontext.post(new sendorpostcallback((obj) =>
{
receivemessage.appendtext(encoding.default.getstring(bytes));
}), bytes);
}
catch (exception error)
{
messagebox.show(error.message);
}
}
}
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。
