CODEWITHSUNDEEP
c#streamconsole-applicationstdoutstdin
resgh
resgh

Reputation: 984

c# stdin read not responding

I have a program that listens to the console stdin stream.

However, even after typing something in the console and pressing Enter, I have to press/move my mouse, the mouse buttons, or the keyboard within the focus of the console for the text typed to be echoed. Even more mysterious is that when I set a breakpoint in the first curly brace of Main() and step into every single statement thereafter, the program executes correctly. How can i fix this? Thanks a lot!

public class test
{
    static byte[] buffer = new byte[1];
    static Stream instrm = Console.OpenStandardInput();
    static Stream outstrm = Console.OpenStandardOutput();
    static System.Text.StringBuilder sb = new System.Text.StringBuilder();
    static void Main()
    {
        while (true)
        {
            instrm.Read(buffer, 0, 1);
            method(buffer);
        }
    }
    public static void method(byte[] buffer)
    {
        sb.Append(System.Text.Encoding.UTF8.GetString(buffer));
        if (buffer[0] == (byte)10) respond();
    }
    public static void respond()
    {
        byte[] bytes = System.Text.Encoding.UTF8.GetBytes(sb.ToString());
        outstrm.Write(bytes, 0, bytes.Length);
        outstrm.Flush();
        sb.Clear();
    }
}

EDIT:
I just tested and found out that it had nothing to do with the thread, so took the part away. I originally posted it so as it was a problem in my other program, this being only a test model to demonstrate it.

Upvotes: 2

Views: 5803

Answers (1)

Xharze
Xharze

Reputation: 2733

I would change the program like this:

static byte[] buffer = new byte[1];
static TextReader instrm = new StreamReader(Console.OpenStandardInput());
static TextWriter outstrm = new StreamWriter(Console.OpenStandardOutput());
static StringBuilder sb = new StringBuilder();
static void Main()
{
  while (true)
  {
    var readLine = instrm.ReadLine();
    respond(readLine);
  }
}

public static void respond(string line)
{
  outstrm.Write(line);
  outstrm.Flush();
}

It is easier and works. The main difference is to use StreamReader and StreamWriter instead for Stream.

Upvotes: 5

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