C# Socket Programming - Multiple Clients

This is the simplest way I could do it. Find the code here (it's a bit more organized):

BTW: Use Buffer.BlockCopy() same syntax but faster

[waszqba]

Your source helped me a lot with my uni project, made me kinda understand how to use C# implementation of sockets and how to serialize data for that. Not all heroes wear capes, thank you.

[fletchercutting]

Thanks for the awesome tutorial. I'm currently designing a multiplayer hacking simulator which I will now be able to program thanks to this tutorial :) It's basically just going to be command based where the client types in commands and the commands, clients and other data is dealt with in the server. Thanks a heap :D

[harunmn]

i was trying to learn about socket programming and this video is awesome, just watched once then i wrote my own server and client.

thanks for sharing....

[fanuelinawgaw]

That was awesome! Not only did you help me get a better understanding but you also made me go further, so thank you very much!

[squirekev]

4:30am testing, ah the exciting life of a programmer. few minutes off from when I'm watching to attempt a similar objective.
Nice tutorial. Verbalizing as you worked away was very helpful in understanding the reasoning for your choices.

[tgifhounds]

You are one of those guys people stand behind and watch code, great tutorial.

[alessandrogerelli]

Great job. You just saved my life and teaches me something fantastic.

[buxt-tech]

Excellent job teaching Sockets. Though, I would have preferred if you took time to comment your code. Not because it necessarily needs comments (though they might help explain things a bit better) but more because otherwise you go very fast! I had to pause and go back several times.

Still, learned more about working with sockets tonight than I ever did trying to read the docs.

[Krypton]

Thank you for this Tutorial! Very usefull to understand how sockets work in C# :)

[tahacyberman]

THAT was AWESOME (Y) really thank you man, you are very pro brother, thank you, that was what I was searching for it for about 2 weeks (Y) THANK YOU

[randomasshandle]

Thanks a lot dude! Very easy to follow along, you spoke clearly, and explained what each method did.

A++ would recommend.

[stefdevs]

Oh thank god. This is so much nicer than the TcpListener/TcpClient api, which is all I've seen in google results. I've been using sockets directly like this for Udp traffic but wasn't sure that I could do the same for Tcp.

[ajitkumar]

Great Video.. you  are a great programmer .I am big FAN of yours. Thanks for this video...it helped me to understand our company project which is also using socket programming.

[stutitehri]

superb tutorial;used to be scared abt socket programming

[MrHogarth]

Hey thanks for the video, I've just decided to get into network programming and this is a great introduction.

[jubinjoy]

Thanks a lot dude, it was something new from my experiance.

[cristianokwiatkovsk]

very good job, i used this in my study

[justchris]

if the ports specified in code don't work, then set the port's number higher than 1024, I forget if port 100 is used by the system or not, but there are a LOT of open ports available, excellent tutorial tho!

[DaGoofSta]

Everyone who wants to send the time to all clients at once you would need to loop through the socket list sending it to all at once for instance

List<Socket> socketList = new List<Socket>();//Will be full of connected clients

foreach(Socket s in socketList)
{
byte[] data = sendString("time string here");
s.Send(data);
}


public byte[] sendString(string msg)//method for converting bytes into strings
{
byte[] data = Encoding.ASCII.GetBytes(msg);
return data;
}

[fletchercutting]

If you want to fix the error when the client disconnects, replace the code in the ReceiveCallback function with this:

Socket socket = (Socket)ar.AsyncState;
            
            try
            {
                int received = socket.EndReceive(AR);
                byte[] dataBuf = new byte[received];
                Array.Copy(_buffer, dataBuf, received);
            
                string text =
received: " + text);
            
                if (text.ToLower() == "get time")
                {
                    SendData(DateTime.Now.ToString(), socket);
                }
                else
                {
request", socket);
                }
            }
            catch
            {
disconnected");


            }