By: Issac in VB.net Tutorials on 2009-02-21
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
This policy contains information about your privacy. By posting, you are declaring that you understand this policy:
- Your name, rating, website address, town, country, state and comment will be publicly displayed if entered.
- Aside from the data entered into these form fields, other stored data about your comment will include:
- Your IP address (not displayed)
- The time/date of your submission (displayed)
- Your email address will not be shared. It is collected for only two reasons:
- Administrative purposes, should a need to contact you arise.
- To inform you of new comments, should you subscribe to receive notifications.
- A cookie may be set on your computer. This is used to remember your inputs. It will expire by itself.
This policy is subject to change at any time and without notice.
These terms and conditions contain rules about posting comments. By submitting a comment, you are declaring that you agree with these rules:
- Although the administrator will attempt to moderate comments, it is impossible for every comment to have been moderated at any given time.
- You acknowledge that all comments express the views and opinions of the original author and not those of the administrator.
- You agree not to post any material which is knowingly false, obscene, hateful, threatening, harassing or invasive of a person's privacy.
- The administrator has the right to edit, move or remove any comment for any reason and without notice.
Failure to comply with these rules may result in being banned from submitting further comments.
These terms and conditions are subject to change at any time and without notice.
Most Viewed Articles (in VB.net )
Latest Articles (in VB.net)
- Data Science
- React Native
- Cloud Computing
- Java Beans
- Mac OS X
- Office 365
- Tech Reviews