CODEWITHSUNDEEP
c#wcf
Roger
Roger

Reputation: 6527

How do I stream a bitmap using WCF and the net.tcp binding?

I'm trying to pass a bitmap from a client to server using wcf and net.tcp binding.

Here's my code so far... please suggest what would be the best way to make it stream that bitmap?

    public void ScreenShot()
    {
          ...

        System.Drawing.Bitmap gdiBitmap = new System.Drawing.Bitmap(pictureBox1.Image);

        apc.server.return_screenshot(name, gdiBitmap);
        ///The socket connection was aborted.
        ///This could be caused by an error processing your message or a receive timeout 
        ///being exceeded by the remote host, or an underlying network resource issue. 
        ///Local socket timeout was '00:00:59.9700000'.
    }

...

[ServiceContract(Namespace = "server",
    CallbackContract = typeof(IfaceServer2Client),
    SessionMode = SessionMode.Required)]


    public interface IfaceClient2Server           ///// what comes from the client to the server.
    {
        [OperationContract(IsOneWay = true)]
        void StartConnection(string clientName);

        [OperationContract(IsOneWay = true)]
        void Message_Cleint2Server(string msg);

        [OperationContract(IsOneWay = true)]
        void ret_listDrives(string n, List<TreeNode> nodeList);

        [OperationContract(IsOneWay = true)]
        void return_screenshot(string n, Bitmap img); /// <- here I'm trying to pass the bitmap.
    }


    public interface IfaceServer2Client          ///// what goes from the sertver, to the client.
    {
        [OperationContract(IsOneWay = true)]
        void AcceptConnection();

        [OperationContract(IsOneWay = true)]
        void RejectConnection();

        [OperationContract(IsOneWay = true)]
        void Message_Server2Client(string msg);

        [OperationContract(IsOneWay = true)]
        void cmd_listDrives();

        [OperationContract(IsOneWay = true)]
        void cmd_changeName(string n);

        [OperationContract(IsOneWay = true)]
        void cmd_screenshot();
    }

Thanks!

edit:

private void Form1_Load(object sender, EventArgs e)
{
        duplex = new ServiceHost(typeof(ServerClass));

        NetTcpBinding tcp = new NetTcpBinding();

        duplex.AddServiceEndpoint(typeof(IfaceClient2Server), tcp, "net.tcp://localhost:9080/service");

        duplex.Open();
}

Upvotes: 1

Views: 3980

Answers (1)

DarkSquirrel42
DarkSquirrel42

Reputation: 10257

try serializing the bitmap to a memory stream and hand it over as a byte array ...

//edit

example: Bitmap -> byte[] -> Bitmap

//lets get a dummy bitmap ... 
Bitmap bmp=new Bitmap(Width,Height);
//... and paint the current form 
this.DrawToBitmap(bmp,new Rectangle(0,0,Width,Height));

//we want to get a byte[] representation ... a MemoryStreams buffer will do
MemoryStream ms = new MemoryStream();
//save image to stream ... the stream will write it into the buffer
bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp);

//get the buffer 
byte[] bitmapBytes = ms.GetBuffer();

//now you can transfer this byte array ...

//on the receiver end you want to get your bitmap back...
//create a new memorystream around the byte array
ms = new MemoryStream(bitmapBytes);
//read the Bitmap back
bmp = (Bitmap)Bitmap.FromStream(ms);
//use it ...
pictureBox1.Image = bmp;

Upvotes: 3

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