VB.NET

TCP/IP Socket Connect to Remote Host:Port

See more Socket/SSL/TLS Examples

Demonstrates how to create a TCP/IP socket, connect to a remote host:port, and receive a "Hello World!" message. VB.NET

Dim success As Boolean = False

' This example requires the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

Dim socket As New Chilkat.Socket

' Connect to port 5555 of localhost.
' The string "localhost" is for testing on a single computer.
' It would typically be replaced with an IP hostname, such
' as "www.chilkatsoft.com".
Dim ssl As Boolean = False
Dim maxWaitMillisec As Integer = 20000
success = socket.Connect("localhost",5555,ssl,maxWaitMillisec)
If (success <> True) Then
    Debug.WriteLine(socket.LastErrorText)
    Exit Sub
End If


' Set maximum timeouts for reading an writing (in millisec)
socket.MaxReadIdleMs = 10000
socket.MaxSendIdleMs = 10000

' Pretend, for the sake of the example, that the
' ficticious server is going to send a "Hello World!" 
' after accepting the connection.  
' Note: Technically, the ReceiveString may not receive the
' complete string, although it's highly probable given the short
' length of the "Hello World!" message. 
' See this Chilkat blog post for more information:
' <a href="http://www.cknotes.com/?p=302">http://www.cknotes.com/?p=302</a>
Dim receivedMsg As String = socket.ReceiveString()
If (socket.LastMethodSuccess <> True) Then
    Debug.WriteLine(socket.LastErrorText)
    Exit Sub
End If


' Close the connection with the server
' Wait a max of 20 seconds (20000 millsec)
success = socket.Close(20000)

Debug.WriteLine(receivedMsg)