Questions about TCP communication

ngarogue

When TCP monitoring, there is a client connection, how to receive the client's information and send the message to the client immediately?
TcpClient MyTcpClient = MyTcpListener.AcceptTcpClient ();
NetworkStream MyStream = MyTcpClient.GetStream ();
byte [] MyBytes = new byte [1024];
int MyBytesRead = MyStream.Read (MyBytes, 0, MyBytes.Length);
string MyMessage = System.Text.Encoding.Default.GetString (MyBytes, 0, MyBytesRead);
cmd = MyMessage;
this.richTextBox1.Text + = cmd;
Ranch
cmd = "HELLO WORLD!";
StreamWriter MyStreamS = new StreamWriter (MyStream);
MyStreamS.Write (cmd);
MyStreamS.Flush ();
MyStreamS.Close ();
MyTcpClient.Close ();

614310

The MyStream.Write (...) obtained directly with GetStream ();

ngarogue

But this also prompts errors
TcpClient MyTcpClient = MyTcpListener.AcceptTcpClient ();
NetworkStream MyStream = MyTcpClient.GetStream ();
byte [] MyBytes = new byte [1024];
int MyBytesRead = MyStream.Read (MyBytes, 0, MyBytes.Length);
string MyMessage = System.Text.Encoding.Default.GetString (MyBytes, 0, MyBytesRead);
cmd = MyMessage;
this.richTextBox1.Text + = cmd.Substring (4,11);
// Explain execution
cmd = "HELLO WORLD!";
MyStream.Write (cmd);
MyStream.Flush ();
MyStream.Close ();
MyTcpClient.Close ();

ngarogue

The following method has not been resolved.
TcpClient MyTcpClient = MyTcpListener.AcceptTcpClient ();
NetworkStream MyStream = MyTcpClient.GetStream ();
byte [] MyBytes = new byte [1024];
int MyBytesRead = MyStream.Read (MyBytes, 0, MyBytes.Length);
string MyMessage = System.Text.Encoding.Default.GetString (MyBytes, 0, MyBytesRead);
cmd = MyMessage;
this.richTextBox1.Text + = cmd.Substring (4,11);
cmd = "HELLO WORLD!";
byte [] byteTime = Encoding.ASCII.GetBytes (cmd);
MyStream.Write (byteTime, 0, byteTime.Length);
//MyStream.Flush ();
MyStream.Close ();
MyTcpClient.Close ();

suolidsnake

TcpListener MyTcpListener = new TcpListener (9999);
            MyTcpListener.Start ();
            TcpClient MyTcpClient = MyTcpListener.AcceptTcpClient ();
            NetworkStream MyStream = MyTcpClient.GetStream ();
            byte [] MyBytes = new byte [1024];
            int MyBytesRead = MyStream.Read (MyBytes, 0, MyBytes.Length);
            string MyMessage = System.Text.Encoding.Default.GetString (MyBytes, 0, MyBytesRead);
            string cmd = MyMessage;
            //this.richTextBox1.Text + = cmd.Substring (4, 11);
            cmd = "HELLO WORLD!";
            byte [] byteTime = Encoding.ASCII.GetBytes (cmd);
            MyStream.Write (byteTime, 0, byteTime.Length);
            //MyStream.Flush ();
            MyStream.Close ();
            MyTcpClient.Close ();
            Console.Read ();

ngarogue

This big brother upstairs seems to make no difference

ngarogue

I don't understand the meaning of the upstairs, can you give me some pointers?

苹果小刀

Asynchronous callback method:
mainSocket.BeginAccept (new AsyncCallback (OnClientConnect), null);
The landlord can refer to relevant information!

ngarogue

My idea is that after receiving the message from the client on the server, it is displayed on the server, and then immediately send a message from the server to the client. This should not be responsible, but why I clicked the code before me but the client cannot receive the service Information. Can you give me a piece of information, thank you

shenhuago

My idea is to display the message on the server after receiving the message from the client
= There is no problem at all, just asynchronous reception

Then immediately send a message from the server to the client
= Here comes the problem: sending messages is fine, but how do you know the status of the client? In other words, how do you know that the client is ready to receive?

Two sub-threads should be used, one is used to monitor and accept client connection requests, and add these requests to a list; the other thread keeps running Socket.Select to filter the Socket in the list to determine the status of the client, which is waiting Receive or wait to send. Then, use asynchronous receiving or sending to process the client's request.