Question

I have a stream reader that I am using to read lines from a stream. This works well however I would like to be able to get the last line which will never end with a line break so the readLine() will not capture it.

I will store this is a global variable and append to the stream before the next run.

Is this possible at all?

void readHandler(IAsyncResult result)
{
    tcpClient = (TcpClient)result.AsyncState;
    StreamReader reader ;
    string line;
    using (reader = new StreamReader(stream))
    {
        while((line = reader.ReadLine()) != null){
            System.Diagnostics.Debug.Write(line);
            System.Diagnostics.Debug.Write("\n\n");
        }

    }
    getData();
}    

Answer 1

ReadLine does capture the final line of the stream even if it doesn’t have a line-break after it. For example:

using System;
using System.IO;

class Test
{
    static void Main()
    {
        string text = "line1\r\nline2";

        using (TextReader reader = new StringReader(text))
        {
            string line;
            while((line = reader.ReadLine()) != null)
            {
                Console.WriteLine(line);
            }
        }
    }
}

Prints:

line1
line2

ReadLine() will only return null when it’s reached the end of the stream and returned all of the data.