Question

When i write using StreamWriter.WriteLine, it adds CRLF to the string and sends it (to the SerialPort).

When i read a string in the same C# program using StreamReader.ReadLine with data like below, it only reads upto the first CR represented by the first (char)13.ToString(), not the CRLF that is represented by the (char)13.ToString() + (char)10.ToString() combination.

string messageHeader = ((char)2).ToString() + 
      @"1H|\^&|REMISOL|P|1|20010212161505SS" + 
      ((char)13).ToString() + 
      ((char)3).ToString() + 
      "E5" + 
      ((char)13).ToString() + 
      ((char)10).ToString();

How do i make it read upto the CRLF block, which is right at the end, and not stop at the CR ?

Thanks.

Answer 1

StreamReader.ReadLine’s documentation notes: A line is defined as a sequence of characters followed by a line feed (“\n”), a carriage return (“\r”) or a carriage return immediately followed by a line feed (“\r\n”)

You’ll need to use Read and read until you encounter \r\n manually.