请问前辈SerialPort类或者控件怎么使用的？
我做一个程序通过串口发送和接收数据(字符串即可)发送的代码如下：serialPort1.Open();
string sPortName = textBox5.Text;
int nBaudRates = Convert.ToInt32(textBox6.Text);
int nDataBits = Convert.ToInt32(textBox7.Text);
Parity pParity = (Parity)Enum.Parse(typeof(Parity), comboBox3.SelectedItem.ToString());
StopBits sStopBits = (StopBits)Enum.Parse(typeof(StopBits), comboBox4.SelectedItem.ToString());
string sTxt = textBox8.Text;
serialPort1.PortName = sPortName;
serialPort1.BaudRate = nBaudRates;
serialPort1.DataBits = nDataBits;
serialPort1.Parity = pParity;
serialPort1.StopBits = sStopBits;
serialPort1.WriteLine(sTxt);
serialPort1.Close();
接收的代码如下：
string sPortName = textBox5.Text;
int nBaudRates = Convert.ToInt32(textBox6.Text);
int nDataBits = Convert.ToInt32(textBox7.Text);
Parity pParity = (Parity)Enum.Parse(typeof(Parity), comboBox3.SelectedItem.ToString());
StopBits sStopBits = (StopBits)Enum.Parse(typeof(StopBits), comboBox4.SelectedItem.ToString());
string sTxt = textBox8.Text;
serialPort1.PortName = sPortName;
serialPort1.BaudRate = nBaudRates;
serialPort1.DataBits = nDataBits;
serialPort1.Parity = pParity;
serialPort1.StopBits = sStopBits;
serialPort1.Open();
MessageBox.Show(serialPort1.ReadLine());
serialPort1.Close();
但都没能正确接收和发送，只是为什么呢？ --------------------编程问答-------------------- 第一个只写了还没有发送的指令,第二个只读了没有读出的指令~
--------------------编程问答-------------------- 那怎么发送和读出呢？ --------------------编程问答-------------------- private SerialPort m_SerialPort = null;
private string m_strPortName = "Com1";
private StopBits m_StopBits = StopBits.Two;
private Parity m_Parity = Parity.Even;
private int m_iDataBits = 8;
private int m_iBaudRate = 57600;
private int m_iCurrentRecieveByteCount = 0;
--打开端口
public bool OpenCOM()
{
bool bResult = true;
try
{
if (m_SerialPort == null)
{
m_SerialPort = new SerialPort();
m_SerialPort.DataReceived += new SerialDataReceivedEventHandler(CpmPort_DataReceivedHandler);
}
else
{
m_SerialPort.DataReceived += new SerialDataReceivedEventHandler(ComPort_DataReceivedHandler);
}
}
if (m_SerialPort.IsOpen)
{
m_SerialPort.Close();
m_SendQueue.Clear();
}
m_SerialPort.PortName = m_strPortName;
m_SerialPort.BaudRate = m_iBaudRate;
m_SerialPort.DataBits = m_iDataBits;
m_SerialPort.StopBits = m_StopBits;
m_SerialPort.Parity = m_Parity;
m_SerialPort.Open();
}
catch (Exception ex)
{
// Throw open comport failed message
}
return bResult;
}
--关闭端口
/// <summary>
/// close com port
/// </summary>
/// <returns></returns>
public bool CloseCOM()
{
bool bResult = true;
try
{
if (m_SerialPort.IsOpen)
{
m_SerialPort.Close();
m_SerialPort = null;
}
}
catch (Exception)
{
bResult = false;
}
return bResult;
}
---发送数据用
private void SendToCom(byte[] rabyteSentData)
{
int iSize = rabyteSentData.Length;
m_SerialPort.Write(rabyteSentData, 0, iSize);
}
--接受com数据
/// <summary>
/// Received data event handler
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ComPort_DataReceivedHandler(object sender, SerialDataReceivedEventArgs e)
{
//Setting timeout
m_SerialPort.ReadTimeout = 100;
// Obtain the number of bytes waiting in the port's buffer
int bytes = m_SerialPort.BytesToRead;
// Create a byte array buffer to hold the incoming data
byte[] buffer = new byte[bytes];
// Read the data from the port and store it in our buffer
m_SerialPort.Read(buffer, 0, bytes);
} --------------------编程问答-------------------- 原来问题点数： 2，早知道就不回了，呵呵 --------------------编程问答-------------------- 打开端口段中
m_SerialPort.DataReceived += new SerialDataReceivedEventHandler(CpmPort_DataReceivedHandler);
}
else
{
m_SerialPort.DataReceived += new SerialDataReceivedEventHandler(ComPort_DataReceivedHandler);
}
}
这里copy错了
如下：
m_SerialPort.DataReceived += new SerialDataReceivedEventHandler(ComPort_DataReceivedHandler);
--------------------编程问答-------------------- 学习 --------------------编程问答-------------------- studying --------------------编程问答-------------------- 发送代码中,应该先设置端口/波特率/校验等 再 open. --------------------编程问答-------------------- //serialPort1.Open();
string sPortName = textBox5.Text;
int nBaudRates = Convert.ToInt32(textBox6.Text);
int nDataBits = Convert.ToInt32(textBox7.Text);
Parity pParity = (Parity)Enum.Parse(typeof(Parity), comboBox3.SelectedItem.ToString());
StopBits sStopBits = (StopBits)Enum.Parse(typeof(StopBits), comboBox4.SelectedItem.ToString());
string sTxt = textBox8.Text;
serialPort1.PortName = sPortName;
serialPort1.BaudRate = nBaudRates;
serialPort1.DataBits = nDataBits;
serialPort1.Parity = pParity;
serialPort1.StopBits = sStopBits;
serialPort1.Open();
serialPort1.WriteLine(sTxt);
serialPort1.Close(); --------------------编程问答-------------------- 我是在VS2005上用C#写的,代码如下:
try
{
serialPort1.Parity = System.IO.Ports.Parity.None;
serialPort1.StopBits = System.IO.Ports.StopBits.One;
serialPort1.BaudRate = 9600;
serialPort1 .DataBits =8;
serialPort1.PortName = "COM2";
serialPort1.ReadBufferSize = 1024;
serialPort1.WriteBufferSize = 1024;
serialPort1.WriteTimeout = 200;
serialPort1.Open();
serialPort1.ReadExisting();//设置Input从接收缓冲读取全部数据
serialPort1.ReceivedBytesThreshold = 1;//设置引发OnComm事件的字节长度
serialPort1.DiscardInBuffer();//清除接收缓冲区
serialPort1.DiscardOutBuffer(); //清除发送缓冲区
}
catch (System .Exception ex)
{
labState.Text = "请重新配置串口!请检查"+ex.Message;
}
但在打开的串口的时候报错?在模拟器PPC2003,WM5/6都可以打开并正常收发? --------------------编程问答-------------------- 有来电显示的 源码吗 --------------------编程问答--------------------
--------------------编程问答--------------------
发送前先设置参数,再open.接收:控件的话在接收事件中处理
若是类对象的话,用timer或线程读该对象的接收缓冲区
补充：.NET技术 , C#
