Multi Threaded Server Socket Programming in VB.net
By: Issac
Multithreaded Server Socket Progam is a Console application which can easily handle multiple clients at the same instant, we need to create a Server Socket from TcpListener class and listen to PORT 8888. When the server gets a request from Client, the Server passes the instance of the client request to a separate class handleClient. In handleClient class there is a Thread, which handles the communication between the instance of Server side client and Client from outside.
For each request from the client, in Server there is a new thread instant is created for communication, so we can connect more than one client at the same time to Server and enable them to communicate independently.
Create a new VB.NET Console Application project and put the following source code in the project.
Imports System.Net.Sockets
Imports System.Text
Module Module1
Sub Main()
Dim serverSocket As New TcpListener(8888)
Dim clientSocket As TcpClient
Dim counter As Integer
serverSocket.Start()
msg("Server Started")
counter = 0
While (True)
counter += 1
clientSocket = serverSocket.AcceptTcpClient()
msg("Client No:" + Convert.ToString(counter) + " started!")
Dim client As New handleClinet
client.startClient(clientSocket, Convert.ToString(counter))
End While
clientSocket.Close()
serverSocket.Stop()
msg("exit")
Console.ReadLine()
End Sub
Sub msg(ByVal mesg As String)
mesg.Trim()
Console.WriteLine(" >> " + mesg)
End Sub
Public Class handleClinet
Dim clientSocket As TcpClient
Dim clNo As String
Public Sub startClient(ByVal inClientSocket As TcpClient, _
ByVal clineNo As String)
Me.clientSocket = inClientSocket
Me.clNo = clineNo
Dim ctThread As Threading.Thread = New Threading.Thread(AddressOf doChat)
ctThread.Start()
End Sub
Private Sub doChat()
Dim requestCount As Integer
Dim bytesFrom(10024) As Byte
Dim dataFromClient As String
Dim sendBytes As [Byte]()
Dim serverResponse As String
Dim rCount As String
requestCount = 0
While (True)
Try
requestCount = requestCount + 1
Dim networkStream As NetworkStream = _
clientSocket.GetStream()
networkStream.Read(bytesFrom, 0, CInt(clientSocket.ReceiveBufferSize))
dataFromClient = System.Text.Encoding.ASCII.GetString(bytesFrom)
dataFromClient = _
dataFromClient.Substring(0, dataFromClient.IndexOf("$"))
msg("From client-" + clNo + dataFromClient)
rCount = Convert.ToString(requestCount)
serverResponse = "Server to clinet(" + clNo + ") " + rCount
sendBytes = Encoding.ASCII.GetBytes(serverResponse)
networkStream.Write(sendBytes, 0, sendBytes.Length)
networkStream.Flush()
msg(serverResponse)
Catch ex As Exception
MsgBox(ex.ToString)
End Try
End While
End Sub
End Class
End Module
Archived Comments
Comment on this tutorial
- Data Science
- Android
- AJAX
- ASP.net
- C
- C++
- C#
- Cocoa
- Cloud Computing
- HTML5
- Java
- Javascript
- JSF
- JSP
- J2ME
- Java Beans
- EJB
- JDBC
- Linux
- Mac OS X
- iPhone
- MySQL
- Office 365
- Perl
- PHP
- Python
- Ruby
- VB.net
- Hibernate
- Struts
- SAP
- Trends
- Tech Reviews
- WebServices
- XML
- Certification
- Interview
categories
Related Tutorials
Using Resume Next and Resume Line in VB.net
Using On Error GoTo 0 in VB.net
Getting an Exception's Number and Description in VB.net
Raising an Exception Intentionally in VB.net
Exception Filtering in the Catch Block in VB.net
Using Multiple Catch Statements in VB.net
Throwing an Exception in VB.net
Throwing a Custom Exception in VB.net
Changes in Controls from VB6 to VB.net
Unstructured Exception Handling in VB.net