Is there any way to directly save serial port incoming data into file?

Question

I need to save whole incoming serial port data into a file. Some people suggest to use File.WriteAllBytes but it takes the all empty indexes of created byte array.

        Array.Resize(ref Read_Data2, Read_Data2.Length + incoming.Length);

        public void SaveData(byte[] incoming)
        {
            for (int i = 0; i < incoming.Length; i++)
            {
                Read_Data2[x] = incoming[i];
                ++x;
            }


            File.WriteAllBytes("C:\\Test3.text", Read_Data2);
        }

I use that method to save all incoming bytes into Read_Data2 but i think something is wrong. It saves the empty indexes of byte array as i said before. How can i improve this or is there any better way to save the incoming serial port data into file?

Answer 1

 private void mySerialPort_DataReceived(System.Object sender, System.IO.Ports.SerialDataReceivedEventArgs e)

{

                SerialPort spL = (SerialPort)sender;
                byte[] bytesToRec = new byte[spL.byteToRead];
                Int64 bytes = spL.Read(bytesToRec, 0, bytesToRec.Length);
                navSerialPort.DiscardInBuffer();
                navSerialPort.DiscardOutBuffer();
                string filepath = @"" + textBox1.Text + "\\" + "KMTU_" +DateTime.Now.ToString("MMM-d-yyyy") + ".hex";
                FileStream LogFile = new FileStream(filepath, FileMode.Create);
                LogFile.Write(bytesToRec, 0, bytesToRec.Length);
                 LogFile.Close();
}