Continues TCP recieve - Visual Basic .NET

Jody L. Whitlock

I'm kinda stumped at the moment, so... Here's what I'm looking to do:
I have a ClientSocket, and I would like to free-thread the recieve end
of it. I tried a delegate, but that won't fire. I'm thinking of using
a networkstream, but can't really find anything on that. The purpose
behind this is becuase my current solution is dropping bytes. I will
post my class here.
_______________ _______________ _______________ _______________ ____________
Imports System.Net
Imports System.Net.Sock ets
Imports System.Text
Imports System.Threadin g

Public Class NetClient
Public Event Connected()
Public Event Disconnected()
Public Event DataRecieved(By Val sender As Object, ByVal DataIn As
String)
Private Delegate Sub TwoArg(ByVal Arg1() As Byte, ByVal Arg2 As
Integer)
Private ClientSocket As Socket
Private Enc As New ASCIIEncoding
Private objLockA As Object
'''
------------------------------------------------------------------------
-----
''' <summary>
''' Initializes the server connection
''' </summary>
''' <param name="ServerNam e">Hostname of the server</param>
''' <param name="ServerPor t">Port number of the server</param>
''' <remarks>
''' </remarks>
''' <history>
''' [JLWHITL] 5/23/2005 Created
''' </history>
'''
------------------------------------------------------------------------
-----
Public Sub Connect(ByVal ServerName As String, ByVal ServerPort As
Integer)
'-- Resolve the name to an IP Address
Dim Addr As IPAddress = Dns.Resolve(Ser verName).Addres sList(0)
If Not Addr Is Nothing Then
'-- Create a new IP Endpoint
Dim ep As New IPEndPoint(Addr , ServerPort)
'--Create new Socket
Me.ClientSocket = New Socket(AddressF amily.InterNetw ork,
SocketType.Stre am, ProtocolType.Tc p)
'-- Connect Async
ClientSocket.Be ginConnect(ep, AddressOf ConnectCallback ,
Nothing)
End If
End Sub
'''
------------------------------------------------------------------------
-----
''' <summary>
''' Closes the server connection
''' </summary>
''' <remarks>
''' </remarks>
''' <history>
''' [JLWHITL] 5/23/2005 Created
''' </history>
'''
------------------------------------------------------------------------
-----
Public Sub Disconnect()
ClientSocket.Sh utdown(SocketSh utdown.Both)
ClientSocket.Cl ose()
RaiseEvent Disconnected()
End Sub
Private Sub ConnectCallback (ByVal ar As IAsyncResult)
ClientSocket.En dConnect(ar)
RaiseEvent Connected()
'-- Begin recieving data
Dim buff(4096) As Byte
ClientSocket.Be ginReceive(buff , 0, buff.Length,
SocketFlags.Non e, AddressOf RecieveCallBack , buff)
End Sub
Public Sub DataProcess(ByV al DataSlot() As Byte, ByVal BytesRecvd
As Integer)
SyncLock Me.objLockA
If BytesRecvd = 0 Then '-- Server has closed connection
ClientSocket.Sh utdown(SocketSh utdown.Both)
ClientSocket.Cl ose()
Else '-- We have data
Dim Recv As String = Enc.GetString(D ataSlot)
'-- Clear the buffer
Array.Clear(Dat aSlot, 0, DataSlot.Length )
'-- Begin recieve again
RaiseEvent DataRecieved(Me , Recv)
'ClientSocket.B eginReceive(Dat aSlot, 0,
DataSlot.Length , SocketFlags.Non e, AddressOf RecieveCallBack , buff)
End If
End SyncLock
End Sub
Private Sub RecieveCallBack (ByVal ar As IAsyncResult)
Try
Dim buff() As Byte = CType(ar.AsyncS tate, Byte())
Dim numBytes As Integer = ClientSocket.En dReceive(ar)
'Dim buff(2048) As Byte
' Dim dlg As New TwoArg(AddressO f DataProcess)
'dlg.Invoke(buf f, numBytes)
If numBytes = 0 Then '-- Server has closed connection
ClientSocket.Sh utdown(SocketSh utdown.Both)
ClientSocket.Cl ose()
Else '-- We have data
Dim Recv As String = Enc.GetString(b uff)
'-- Clear the buffer
Array.Clear(buf f, 0, buff.Length)
'-- Begin recieve again
RaiseEvent DataRecieved(Me , Recv)
ClientSocket.Be ginReceive(buff , 0, buff.Length,
SocketFlags.Non e, AddressOf RecieveCallBack , buff)
End If
Catch ex As Exception
'Throw New Exception(ex.Me ssage, ex.InnerExcepti on)
End Try
End Sub
'''
------------------------------------------------------------------------
-----
''' <summary>
''' Sends data to the server
''' </summary>
''' <param name="DataOut"> String to send</param>
''' <remarks>
''' </remarks>
''' <history>
''' [JLWHITL] 5/23/2005 Created
''' </history>
'''
------------------------------------------------------------------------
-----
Public Sub Send(ByVal DataOut As String)
Dim buff() As Byte = Enc.ASCII.GetBy tes(DataOut)
ClientSocket.Se nd(buff)
End Sub
End Class
_______________ _______________ _______________ _______________ ____________

Thank you,
Jody

Nov 21 '05 #1

Subscribe Reply

1483

Supra

following my example i put another class1.vb

Delegate Sub OneArgSub(ByVal rtb As RichTextBox, ByVal szText As
String, ByVal szColour As String, ByVal szNum As Integer)
Private deleg As OneArgSub

Private Sub _Connection_onS everMessage(ByV al szText As String)
Handles _Connection.onS everMessage
deleg = New OneArgSub(Addre ssOf DisplayMessage)
deleg.Invoke(nS tatus.rtbStatus , szText.ToString ,
GetUserColours. colourOther, 12)
End Sub

don't put delegate in NetClient's class.
regards

Jody L. Whitlock wrote:

I'm kinda stumped at the moment, so... Here's what I'm looking to do:
I have a ClientSocket, and I would like to free-thread the recieve end
of it. I tried a delegate, but that won't fire. I'm thinking of using
a networkstream, but can't really find anything on that. The purpose
behind this is becuase my current solution is dropping bytes. I will
post my class here.
______________ _______________ _______________ _______________ _____________
Imports System.Net
Imports System.Net.Sock ets
Imports System.Text
Imports System.Threadin g

Public Class NetClient
Public Event Connected()
Public Event Disconnected()
Public Event DataRecieved(By Val sender As Object, ByVal DataIn As
String)
Private Delegate Sub TwoArg(ByVal Arg1() As Byte, ByVal Arg2 As
Integer)
Private ClientSocket As Socket
Private Enc As New ASCIIEncoding
Private objLockA As Object
'''
------------------------------------------------------------------------
-----
''' <summary>
''' Initializes the server connection
''' </summary>
''' <param name="ServerNam e">Hostname of the server</param>
''' <param name="ServerPor t">Port number of the server</param>
''' <remarks>
''' </remarks>
''' <history>
''' [JLWHITL] 5/23/2005 Created
''' </history>
'''
------------------------------------------------------------------------
-----
Public Sub Connect(ByVal ServerName As String, ByVal ServerPort As
Integer)
'-- Resolve the name to an IP Address
Dim Addr As IPAddress = Dns.Resolve(Ser verName).Addres sList(0)
If Not Addr Is Nothing Then
'-- Create a new IP Endpoint
Dim ep As New IPEndPoint(Addr , ServerPort)
'--Create new Socket
Me.ClientSocket = New Socket(AddressF amily.InterNetw ork,
SocketType.Str eam, ProtocolType.Tc p)
'-- Connect Async
ClientSocket.Be ginConnect(ep, AddressOf ConnectCallback ,
Nothing)
End If
End Sub
'''
------------------------------------------------------------------------
-----
''' <summary>
''' Closes the server connection
''' </summary>
''' <remarks>
''' </remarks>
''' <history>
''' [JLWHITL] 5/23/2005 Created
''' </history>
'''
------------------------------------------------------------------------
-----
Public Sub Disconnect()
ClientSocket.Sh utdown(SocketSh utdown.Both)
ClientSocket.Cl ose()
RaiseEvent Disconnected()
End Sub
Private Sub ConnectCallback (ByVal ar As IAsyncResult)
ClientSocket.En dConnect(ar)
RaiseEvent Connected()
'-- Begin recieving data
Dim buff(4096) As Byte
ClientSocket.Be ginReceive(buff , 0, buff.Length,
SocketFlags.No ne, AddressOf RecieveCallBack , buff)
End Sub
Public Sub DataProcess(ByV al DataSlot() As Byte, ByVal BytesRecvd
As Integer)
SyncLock Me.objLockA
If BytesRecvd = 0 Then '-- Server has closed connection
ClientSocket.Sh utdown(SocketSh utdown.Both)
ClientSocket.Cl ose()
Else '-- We have data
Dim Recv As String = Enc.GetString(D ataSlot)
'-- Clear the buffer
Array.Clear(Dat aSlot, 0, DataSlot.Length )
'-- Begin recieve again
RaiseEvent DataRecieved(Me , Recv)
'ClientSocket.B eginReceive(Dat aSlot, 0,
DataSlot.Lengt h, SocketFlags.Non e, AddressOf RecieveCallBack , buff)
End If
End SyncLock
End Sub
Private Sub RecieveCallBack (ByVal ar As IAsyncResult)
Try
Dim buff() As Byte = CType(ar.AsyncS tate, Byte())
Dim numBytes As Integer = ClientSocket.En dReceive(ar)
'Dim buff(2048) As Byte
' Dim dlg As New TwoArg(AddressO f DataProcess)
'dlg.Invoke(buf f, numBytes)
If numBytes = 0 Then '-- Server has closed connection
ClientSocket.Sh utdown(SocketSh utdown.Both)
ClientSocket.Cl ose()
Else '-- We have data
Dim Recv As String = Enc.GetString(b uff)
'-- Clear the buffer
Array.Clear(buf f, 0, buff.Length)
'-- Begin recieve again
RaiseEvent DataRecieved(Me , Recv)
ClientSocket.Be ginReceive(buff , 0, buff.Length,
SocketFlags.No ne, AddressOf RecieveCallBack , buff)
End If
Catch ex As Exception
'Throw New Exception(ex.Me ssage, ex.InnerExcepti on)
End Try
End Sub
'''
------------------------------------------------------------------------
-----
''' <summary>
''' Sends data to the server
''' </summary>
''' <param name="DataOut"> String to send</param>
''' <remarks>
''' </remarks>
''' <history>
''' [JLWHITL] 5/23/2005 Created
''' </history>
'''
------------------------------------------------------------------------
-----
Public Sub Send(ByVal DataOut As String)
Dim buff() As Byte = Enc.ASCII.GetBy tes(DataOut)
ClientSocket.Se nd(buff)
End Sub
End Class
______________ _______________ _______________ _______________ _____________

Thank you,
Jody

Nov 21 '05 #2

Supra

u may have to used addhandled keyword

Jody L. Whitlock wrote:

I'm kinda stumped at the moment, so... Here's what I'm looking to do:
I have a ClientSocket, and I would like to free-thread the recieve end
of it. I tried a delegate, but that won't fire. I'm thinking of using
a networkstream, but can't really find anything on that. The purpose
behind this is becuase my current solution is dropping bytes. I will
post my class here.
______________ _______________ _______________ _______________ _____________
Imports System.Net
Imports System.Net.Sock ets
Imports System.Text
Imports System.Threadin g

Public Class NetClient
Public Event Connected()
Public Event Disconnected()
Public Event DataRecieved(By Val sender As Object, ByVal DataIn As
String)
Private Delegate Sub TwoArg(ByVal Arg1() As Byte, ByVal Arg2 As
Integer)
Private ClientSocket As Socket
Private Enc As New ASCIIEncoding
Private objLockA As Object
'''
------------------------------------------------------------------------
-----
''' <summary>
''' Initializes the server connection
''' </summary>
''' <param name="ServerNam e">Hostname of the server</param>
''' <param name="ServerPor t">Port number of the server</param>
''' <remarks>
''' </remarks>
''' <history>
''' [JLWHITL] 5/23/2005 Created
''' </history>
'''
------------------------------------------------------------------------
-----
Public Sub Connect(ByVal ServerName As String, ByVal ServerPort As
Integer)
'-- Resolve the name to an IP Address
Dim Addr As IPAddress = Dns.Resolve(Ser verName).Addres sList(0)
If Not Addr Is Nothing Then
'-- Create a new IP Endpoint
Dim ep As New IPEndPoint(Addr , ServerPort)
'--Create new Socket
Me.ClientSocket = New Socket(AddressF amily.InterNetw ork,
SocketType.Str eam, ProtocolType.Tc p)
'-- Connect Async
ClientSocket.Be ginConnect(ep, AddressOf ConnectCallback ,
Nothing)
End If
End Sub
'''
------------------------------------------------------------------------
-----
''' <summary>
''' Closes the server connection
''' </summary>
''' <remarks>
''' </remarks>
''' <history>
''' [JLWHITL] 5/23/2005 Created
''' </history>
'''
------------------------------------------------------------------------
-----
Public Sub Disconnect()
ClientSocket.Sh utdown(SocketSh utdown.Both)
ClientSocket.Cl ose()
RaiseEvent Disconnected()
End Sub
Private Sub ConnectCallback (ByVal ar As IAsyncResult)
ClientSocket.En dConnect(ar)
RaiseEvent Connected()
'-- Begin recieving data
Dim buff(4096) As Byte
ClientSocket.Be ginReceive(buff , 0, buff.Length,
SocketFlags.No ne, AddressOf RecieveCallBack , buff)
End Sub
Public Sub DataProcess(ByV al DataSlot() As Byte, ByVal BytesRecvd
As Integer)
SyncLock Me.objLockA
If BytesRecvd = 0 Then '-- Server has closed connection
ClientSocket.Sh utdown(SocketSh utdown.Both)
ClientSocket.Cl ose()
Else '-- We have data
Dim Recv As String = Enc.GetString(D ataSlot)
'-- Clear the buffer
Array.Clear(Dat aSlot, 0, DataSlot.Length )
'-- Begin recieve again
RaiseEvent DataRecieved(Me , Recv)
'ClientSocket.B eginReceive(Dat aSlot, 0,
DataSlot.Lengt h, SocketFlags.Non e, AddressOf RecieveCallBack , buff)
End If
End SyncLock
End Sub
Private Sub RecieveCallBack (ByVal ar As IAsyncResult)
Try
Dim buff() As Byte = CType(ar.AsyncS tate, Byte())
Dim numBytes As Integer = ClientSocket.En dReceive(ar)
'Dim buff(2048) As Byte
' Dim dlg As New TwoArg(AddressO f DataProcess)
'dlg.Invoke(buf f, numBytes)
If numBytes = 0 Then '-- Server has closed connection
ClientSocket.Sh utdown(SocketSh utdown.Both)
ClientSocket.Cl ose()
Else '-- We have data
Dim Recv As String = Enc.GetString(b uff)
'-- Clear the buffer
Array.Clear(buf f, 0, buff.Length)
'-- Begin recieve again
RaiseEvent DataRecieved(Me , Recv)
ClientSocket.Be ginReceive(buff , 0, buff.Length,
SocketFlags.No ne, AddressOf RecieveCallBack , buff)
End If
Catch ex As Exception
'Throw New Exception(ex.Me ssage, ex.InnerExcepti on)
End Try
End Sub
'''
------------------------------------------------------------------------
-----
''' <summary>
''' Sends data to the server
''' </summary>
''' <param name="DataOut"> String to send</param>
''' <remarks>
''' </remarks>
''' <history>
''' [JLWHITL] 5/23/2005 Created
''' </history>
'''
------------------------------------------------------------------------
-----
Public Sub Send(ByVal DataOut As String)
Dim buff() As Byte = Enc.ASCII.GetBy tes(DataOut)
ClientSocket.Se nd(buff)
End Sub
End Class
______________ _______________ _______________ _______________ _____________

Thank you,
Jody

Nov 21 '05 #3

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