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send image via tcp/ip

i am trying to send a picturebox image to a client computer using tcp.but im really struggling. i have converted the image to bytes before sending it. but i am having trouble converting the bytes back to image once it gets to the client. how do i determine the about of bytes to be read.

Server Side code'''''''''''''''''''''''''''''''''''''''
 Public Sub start()
        Listener.Start()
        Client = Listener.AcceptTcpClient
        Stream = Client.GetStream()
        '----
        w = New BinaryWriter(Stream)
        r = New BinaryReader(Stream)
        '----
        If r.ReadString() = "RequestConnect" Then
            w.Write("Connected")
            Do
                w.Write(imageToByteArray(Form1.PictureBox1.Image))
                w.Write("Connected")
            Loop Until r.ReadString() = "Disconnect"
            w.Write("Disconnected")
        End If
        Client.Close()
        Listener.Stop()
    End Sub
 
    Public Function imageToByteArray(ByVal imageIn As Image) As Byte()
        Dim ms As MemoryStream = New MemoryStream()
        imageIn.Save(ms, System.Drawing.Imaging.ImageFormat.jpg)
        Return ms.ToArray()
    End Function
''---------------------------------------------------------------
 
CLIENT SIDE CODE''''''''''''''''''''''''''''''''''''''''''''''''''''
 Public Sub connect()
        Client.Connect(IP, port)
        Stream = Client.GetStream
        '----
        w = New BinaryWriter(Stream)
        r = New BinaryReader(Stream)
        '----
        
        w.Write("RequestConnect")
        If r.ReadString() = "Connected" Then
            Do
 ''HERES THE PROBLEM. how do i determine the amount of bytes to read
    Form1.PictureBox1.Image = byteArrayToImage(r.ReadBytes(126643))
                Application.DoEvents()
                w.Write("RequestConnect")
            Loop Until r.ReadString() = "Disconnected"
        End If
        Client.Close()
    End Sub
 
 Public Function byteArrayToImage(ByVal byteArrayIn() As Byte) As Image
        Dim ms As MemoryStream = New MemoryStream(byteArrayIn)
        Dim returnImage As Image = Image.FromStream(ms)
        Return returnImage
    End Function

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ASKER CERTIFIED SOLUTION

drichards

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carl5121

ASKER

thank you for your help. i've been looking for an answer for a week. i joined this website today and a good choice that was.

agoud

This is how I do it with messages but it will have to be adapted to 'adding to the byte array'. I believe the keyphrase here is "While stream.DataAvailable". You will also have to use the stream (from Client.GetStream) directly. This is simply another way to do it.

While stream.DataAvailable
       i = stream.Read(bytes, 0, bytes.Length)
      Msg = Msg + System.Text.Encoding.ASCII.GetString(bytes, 0, i)
      Console.WriteLine("Received: {0}", Msg)
End While

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