Clear serial port receive buffer in C#

Question

Just want to know how do we clear the receive buffer of my serial port in C#. Seems like the data in the receive buffer just keep accumulating. For example, the flow of inc

Answer 1

If you are using the System.IO.Ports.SerialPort then you could use the two methods:

DiscardInBuffer() and DiscardOutBuffer() to flush the buffers.

If you are reading the data from a serial port:

private void comPort_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
    if (!this.Open) return; // We can't receive data if the port has already been closed.  This prevents IO Errors from being half way through receiving data when the port is closed.
    string line = String.empty;
    try
    {
        line = _SerialPort.ReadLine();
        line = line.Trim();
       //process your data if it is "DATA C", otherwise ignore
    }
    catch (IOException ex)
    {
        //process any errors
    }
}