Tag: csharp

Show a Dialog using AlertDialog in Xamarin Android

//set alert for executing the task
AlertDialog.Builder alert = new AlertDialog.Builder (this);
alert.SetTitle ("Confirm delete");
alert.SetMessage ("Lorem ipsum dolor sit amet, consectetuer adipiscing elit.");
alert.SetPositiveButton ("Delete", (senderAlert, args) => {
	Toast.MakeText(this ,"Deleted!" , ToastLength.Short).Show();
});

alert.SetNegativeButton ("Cancel", (senderAlert, args) => {
	Toast.MakeText(this ,"Cancelled!" , ToastLength.Short).Show();
});

Dialog dialog = alert.Create();
dialog.Show();

References :
http://javatechig.com/xamarin/alertdialog-and-dialogfragment-example-in-xamarin-android

Communicate over TCP Socket and Serialize data with json format in C#

Client :

Socket socket=new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);
            socket.Connect("127.0.0.1",9011);

            Console.WriteLine("connected...");

            Person person=new Person(){Name = "Mahmood"};

            string jsonData = JsonConvert.SerializeObject(person);
            byte[] dataBytes = Encoding.Default.GetBytes(jsonData);

            socket.Send(dataBytes);

            Console.WriteLine("sent...");

            byte[] buffer=new byte[1024*4];
            int readBytes = socket.Receive(buffer);
            MemoryStream memoryStream = new MemoryStream();

            while (readBytes>0)
            {
                memoryStream.Write(buffer, 0, readBytes);

                if (socket.Available > 0)
                {
                    readBytes = socket.Receive(buffer);   
                }
                else
                {
                    break;
                }
            }

            Console.WriteLine("read...");

            byte[] totalBytes = memoryStream.ToArray();

            memoryStream.Close();

            string readData = Encoding.Default.GetString(totalBytes);

            Greeting response = JsonConvert.DeserializeObject<Greeting>(readData);

            Console.WriteLine(response.Msg);

            Console.ReadKey();

Server :

            Socket socket=new Socket(AddressFamily.InterNetwork,SocketType.Stream, ProtocolType.Tcp);
            EndPoint endPoint=new IPEndPoint(IPAddress.Any, 9011);

            socket.Bind(endPoint);
            socket.Listen(5);

            while (true)
            {
                Console.WriteLine("waiting for new connection...");

                Socket newSocket = socket.Accept();

                MemoryStream memoryStream = new MemoryStream();

                Console.WriteLine("new connection...");

                byte[] buffer=new byte[1024];

                int readBytes = newSocket.Receive(buffer);

                while (readBytes>0)
                {
                    memoryStream.Write(buffer,0,readBytes);

                    if (socket.Available > 0)
                    {
                        readBytes = newSocket.Receive(buffer);    
                    }
                    else
                    {
                        break;
                    }
                }

                Console.WriteLine("data received...");

                byte[] totalBytes = memoryStream.ToArray();

                memoryStream.Close();

                string readData = Encoding.Default.GetString(totalBytes);

                Person p= JsonConvert.DeserializeObject<Person>(readData);

                Greeting g = SayHello(p);

                string dataToSend = JsonConvert.SerializeObject(g);

                byte[] dataToSendBytes = Encoding.Default.GetBytes(dataToSend);

                newSocket.Send(dataToSendBytes);

                newSocket.Close();

                Console.WriteLine("data sent...");
            }

Communicate over TCP Socket and Serialize data with binary format in C#

Client :

Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            socket.Connect("127.0.0.1", 9011);

            Console.WriteLine("connected...");

            BinaryFormatter formatter=new BinaryFormatter();
            MemoryStream memoryStream = new MemoryStream();
            Person person = new Person() { Name = "Mahmood" };

            formatter.Serialize(memoryStream,person);

            byte[] dataBytes = memoryStream.ToArray();
            socket.Send(dataBytes);

            Console.WriteLine("sent...");

            memoryStream = new MemoryStream();
            byte[] buffer = new byte[1024 * 4];
            int readBytes = socket.Receive(buffer);
            
            while (readBytes > 0)
            {
                memoryStream.Write(buffer, 0, readBytes);

                if (socket.Available>0)
                {
                    readBytes = socket.Receive(buffer);
                }
                else
                {
                    break;
                }
            }

            Console.WriteLine("read...");
            formatter=new BinaryFormatter();

            // set position to 0 or create a new stream
            memoryStream.Position = 0;
            Greeting response = (Greeting) formatter.Deserialize(memoryStream);

            Console.WriteLine(response.Msg);

            memoryStream.Close();
            socket.Close();

            Console.ReadKey();

Server :

            Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            EndPoint endPoint = new IPEndPoint(IPAddress.Any, 9011);

            socket.Bind(endPoint);
            socket.Listen(5);

            while (true)
            {
                Console.WriteLine("waiting for new connection...");

                Socket newSocket = socket.Accept();

                Console.WriteLine("new connection...");

                byte[] buffer = new byte[1024];

                int readBytes = newSocket.Receive(buffer);
                MemoryStream memoryStream = new MemoryStream();

                while (readBytes > 0)
                {
                    memoryStream.Write(buffer, 0, readBytes);

                    if (socket.Available>0)
                    {
                        readBytes = newSocket.Receive(buffer);
                    }
                    else
                    {
                        break;
                    }
                }

                Console.WriteLine("data received...");

                BinaryFormatter formatter=new BinaryFormatter();
                memoryStream.Position = 0;
                Person p = (Person) formatter.Deserialize(memoryStream);

                memoryStream.Close();

                Greeting g = SayHello(p);

                formatter=new BinaryFormatter();
                memoryStream=new MemoryStream();

                formatter.Serialize(memoryStream,g);

                newSocket.Send(memoryStream.ToArray());

                memoryStream.Close();
                newSocket.Close();

                Console.WriteLine("data sent...");