byte array to image

[bassguru]

Hello everyone,

I'm having problem converting a byte array to an image. My program begins by converting an image to a byte array, then sends it across the Internet. The TCP server then listens for the incoming packets and SHOULD then convert the byte array back to an image.

An invalid parameter error occurs when trying to convert the byte array to an image.

        static void Connect(String server, byte[] Image)
        {
            try
            {
                // Create a TcpClient.
                Int32 port = 9050;
                TcpClient client = new TcpClient(server, port);

                NetworkStream stream = client.GetStream();

                stream.Write(Image, 0, Image.Length);
                Console.WriteLine("Sent image...");

                stream.Close();
                client.Close();
            }
            catch(ArgumentNullException e)
            {
                Console.WriteLine("ArgumentNullException: {0}", e);
            }
            catch(SocketException e)
            {
                Console.WriteLine("SocketException: {0}", e);
            }
        }


        //Listen for incoming packets
        public void Listen()
        {
            TcpListener server=null;
            try
            {
                Int32 port = 9050;
                IPAddress localAddr = IPAddress.Parse("127.0.0.1");

                // TcpListener server = new TcpListener(port);
                server = new TcpListener(localAddr, port);

                // Start listening for client requests.
                server.Start();

                // Buffer for reading data
                Byte[] bytes = new Byte[1024];
                Image img;

                // Enter the listening loop.
                while(true)
                {
                    TcpClient client = server.AcceptTcpClient();
                    Console.WriteLine("Connected!");

                    img = null;

                    // Get a stream object for reading and writing
                    NetworkStream stream = client.GetStream();

                    int i;

                    // Loop to receive all the data sent by the client.
                    while((i = stream.Read(bytes, 0, bytes.Length)) != 0)
                    {                        
                        img = byteArrayToImage(bytes);
                        
                        //Display recieved image
                        pictureBox1.Image = img;

                        Console.WriteLine("Recieved image.");
                    }

                    // Shutdown and end connection
                    client.Close();
                }
            }
            catch(SocketException e)
            {
                Console.WriteLine("SocketException: {0}", e);
            }
            finally
            {
                // Stop listening for new clients.
                server.Stop();
            }            
        }

        public byte[] imageToByteArray(System.Drawing.Image imageIn)
        {
            MemoryStream ms = new MemoryStream();
            imageIn.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);
            return ms.ToArray();
        }

        public Image byteArrayToImage(byte[] byteArrayIn)
        {
            MemoryStream ms = new MemoryStream(byteArrayIn);
            Image returnImage = Image.FromStream(ms);
            return returnImage;
        }

Any suggestions?

Many thanks in advance,
bassguru

[bassguru]

Perhaps it would help if I showed you where I believe the error is occuring.

        static void Connect(String server, byte[] Image)
        {
            try
            {
                // Create a TcpClient.
                Int32 port = 9050;
                TcpClient client = new TcpClient(server, port);

                NetworkStream stream = client.GetStream();

                stream.Write(Image, 0, Image.Length);
                Console.WriteLine("Sent image...");

                stream.Close();
                client.Close();
            }
            catch(ArgumentNullException e)
            {
                Console.WriteLine("ArgumentNullException: {0}", e);
            }
            catch(SocketException e)
            {
                Console.WriteLine("SocketException: {0}", e);
            }
        }


        //Listen for incoming packets
        public void Listen()
        {
            TcpListener server=null;
            try
            {
                Int32 port = 9050;
                IPAddress localAddr = IPAddress.Parse("127.0.0.1");

                // TcpListener server = new TcpListener(port);
                server = new TcpListener(localAddr, port);

                // Start listening for client requests.
                server.Start();

                // Buffer for reading data
                Byte[] bytes = new Byte[1024];
                Image img;

                // Enter the listening loop.
                while(true)
                {
                    TcpClient client = server.AcceptTcpClient();
                    Console.WriteLine("Connected!");

                    img = null;

                    // Get a stream object for reading and writing
                    NetworkStream stream = client.GetStream();

                    int i;

                    // Loop to receive all the data sent by the client.
                    while((i = stream.Read(bytes, 0, bytes.Length)) != 0)
                    {                        
                        img = byteArrayToImage(bytes);    //This is what I think is responsible for the error. How do I get the stream and convert the data packets to a byte array???
                        
                        //Display recieved image
                        pictureBox1.Image = img;

                        Console.WriteLine("Recieved image.");
                    }

                    // Shutdown and end connection
                    client.Close();
                }
            }
            catch(SocketException e)
            {
                Console.WriteLine("SocketException: {0}", e);
            }
            finally
            {
                // Stop listening for new clients.
                server.Stop();
            }            
        }

        public byte[] imageToByteArray(System.Drawing.Image imageIn)
        {
            MemoryStream ms = new MemoryStream();
            imageIn.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);
            return ms.ToArray();
        }

        public Image byteArrayToImage(byte[] byteArrayIn)
        {
            MemoryStream ms = new MemoryStream(byteArrayIn);
            Image returnImage = Image.FromStream(ms);                // Error: Parameter is not valid!
            return returnImage;
        }

I think the problem is that I am not correctly taking the incoming data packets and then converting them into a byte array (which can then be subsiquently converted to an image). Any suggestions on how to do this properly?

Thanks,
bassguru