I cannot for the life of me figure out why my little bit of code doesn't work.
Problem I'm seeing is ReadExisting() returns 1 single character followed by (BytesRemainingInBuffer-1) 0's. OnReceive events fire properly, but each call to ReadExisting returns only that one character.
data = comport.ReadExisting();
bytes = comport.BytesToRead;
status.Text =
"READ: " + data.Length.ToString() + " EXPECTING: " + bytes.ToString();For instance, suppose the buffer has "12345":
- returns "1\0\0\0\0"
- returns "2\0\0\0"
- returns "3\0\0"
- returns "4\0"
- returns "5"
Anyone else see a similar problem
Don Lafontaine
Framework 2.0 Serial Port problem.
Antony Nguyen
I was unable to reproduce the problem that you are seeing. I used the following code to send "12345" over a null modem cable between COM1 and COM2 and ReadExisting returned the full string "12345".
SerialPort com1 = new SerialPort("COM1");
SerialPort com2 = new SerialPort("COM2");
string receivedString;
com1.Open();
com2.Open();
com1.Write("12345");
while(com2.BytesToRead != 5) {
System.Threading.Thread.Sleep(100);
}
receivedString = com2.ReadExisting();
Console.WriteLine(receivedString);
Console.WriteLine(receivedString.Length);
Please let me know what you are doing differently.
Ryan Byingtion [MS]
Dave Elliott Msdn