[C #] Socket Communications objects via C #
Yesterday we showed you do simple example transfers the socket in c #, hôm nay tiếp tục hướng dẫn các bạn truyền đối tượng qua socket 😉
This article guides you write the program transfers between client and server objects. Client is 1 From information 1 book (Book) including title, author, Publishing year and category. Client 2 send button (will send information to the server) and receive (receive information from the server). When you press the submit button, the server Client will receive and record information on file on the server. When the client receives the server button reads the file and sent to the Client, Client displays the information received on From. Like the picture below.
Now of what we will build 2 BookClient and BookServer Project is structured like this:
The object communication via socket in c # it similar as the previous day, only thing we need to do to move objects byte array and then send receive. Upon receipt of the object are needed to restore function object from a byte array that.
Ham move 1 object to byte array and vice versa.
// nen data thanh 1 mang byte
public byte[] SerializeData(Object o)
{
MemoryStream ms = new MemoryStream();
BinaryFormatter bf1 = new BinaryFormatter();
bf1.Serialize(ms, o);
return ms.ToArray();
}
// giai nen 1 mang byte thanh 1 doi tuong (bject)
public object DeserializeData(byte[] theByteArray)
{
MemoryStream ms = new MemoryStream(theByteArray);
BinaryFormatter bf1 = new BinaryFormatter();
ms.Position = 0;
return bf1.Deserialize(ms);
}
But your attention to perform the compression object to Serialize the object class that should have keywords [Serialize] before class. Specifically for the following class Book (class Book nằm trong project của Client)
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace BookClient
{
[Serializable]
class Book
{
public String title, author, yearOfPublication, genre;
}
}
Following is the code From Client (The interface design of your offline)
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;
using System.Net;
using System.Text;
using System.Net.Sockets;
using System.Runtime.Serialization.Formatters.Binary;
namespace BookClient
{
public partial class Form1 : Form
{
Socket client;
private const int BUFFER_SIZE = 1024;
private const int PORT_NUMBER = 7826;
static ASCIIEncoding encoding = new ASCIIEncoding();
public Form1()
{
InitializeComponent();
connectServer();
}
// ket noi den server
private void connectServer()
{
IPEndPoint iep = new IPEndPoint(IPAddress.Parse("127.0.0.1"), PORT_NUMBER);
client = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
client.Connect(iep);
}
// nen data thanh 1 mang byte
public byte[] SerializeData(Object o)
{
MemoryStream ms = new MemoryStream();
BinaryFormatter bf1 = new BinaryFormatter();
bf1.Serialize(ms, o);
return ms.ToArray();
}
// giai nen 1 mang byte thanh 1 doi tuong (bject)
public object DeserializeData(byte[] theByteArray)
{
MemoryStream ms = new MemoryStream(theByteArray);
BinaryFormatter bf1 = new BinaryFormatter();
ms.Position = 0;
return bf1.Deserialize(ms);
}
// gui du lieu cho server
private void btnSend_Click(object sender, EventArgs e)
{
// tao va lay du lieu tu form
Book b = new Book();
b.title = tbTitle.Text;
b.author = tbAuthor.Text;
b.yearOfPublication = tbYear.Text;
b.genre = tbGenre.Text;
// gui lenh yeu cau la client muon gui du lieu
client.Send(encoding.GetBytes("send"));
// gui du lieu
client.Send(SerializeData(b));
}
private void btnReceive_Click(object sender, EventArgs e)
{
// gui lenh yeu cau lay du lieu tu server
client.Send(encoding.GetBytes("receive"));
byte[] data = new byte[BUFFER_SIZE];
// nhan du lieu tu server gui xuong
int rec = client.Receive(data);
// hien thi thong tin nhan duoc len form
Book b = (Book)DeserializeData(data);
tbTitle.Text = b.title;
tbAuthor.Text = b.author;
tbYear.Text = b.yearOfPublication;
tbGenre.Text = b.genre;
}
private void Form1_Load(object sender, EventArgs e)
{
}
}
}
Code của server
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net.Sockets;
using System.Net;
using System.Runtime.Serialization.Formatters.Binary;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
using System.Net;
using System.Text;
using System.Net.Sockets;
using System.Runtime.Serialization.Formatters.Binary;
namespace BookServer
{
class Program
{
private const int BUFFER_SIZE = 1024;
private const int PORT_NUMBER = 7826;
static ASCIIEncoding encoding = new ASCIIEncoding();
Socket server;
// ghi data xuong file
protected bool SaveData(byte[] Data)
{
BinaryWriter Writer = null;
string Name = "book";
try
{
Writer = new BinaryWriter(File.OpenWrite(Name));
Writer.Write(Data);
Writer.Flush();
Writer.Close();
}
catch
{
return false;
}
return true;
}
private void initServer()
{
IPEndPoint iep = new IPEndPoint(IPAddress.Parse("127.0.0.1"), PORT_NUMBER);
// tao server
server = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
Console.WriteLine("dang cho client ket noi...");
// lang nghe ket noi
server.Bind(iep);
server.Listen(10);
// chap nhan client ket noi
Socket client = server.Accept();
Console.WriteLine("Chap nhan ket noi tu: " + client.RemoteEndPoint.ToString());
byte[] data = new byte[BUFFER_SIZE];
// vong lap vo han thuc hien viec nhan va gui du lieu
while (true)
{
// nhan lenh: gui hoac nhan du lieu
int rec = client.Receive(data);
String command = encoding.GetString(data, 0, rec);
Console.WriteLine("command = " + command);
// client send data den server
if (command.Equals("send"))
{
client.Receive(data);
Console.WriteLine("Nhan thanh cong");
if (SaveData(data))
{
Console.WriteLine("Ghi thanh cong");
}
else
{
Console.WriteLine("Ghi that bai");
}
}
// client muon lay data tu server
else
{
Console.WriteLine("Dang gui...");
// doc du lieu tu file
byte[] arraydata = File.ReadAllBytes("book");
// gui du lieu doc duoc cho client
client.Send(arraydata);
}
}
}
static void Main(string[] args)
{
new Program().initServer();
}
}
}
You can download 2 Client and Server in this project.
e question is: e have 1 Account class from the client as follows:
class Account{
private string username = "";
private string password = "";
public Account(string username, string password)
{
this.username = username;
this.password = password;
}
public string Username{
get
{
return username;
}
}
public string Password
{
get
{
return password;
}
}
}
So how do server can work as your username and password to be sent 1 similar to that sir Account
In his article then states that, you need to extract the object which was used Serialize.
e did r, client has been sent successfully, but when receiving the error sv luxuriant lum. This is the e sv:
IPAddress address = IPAddress.Parse("127.0.0.1");TcpListener listener = new TcpListener(address, PORT_NUMBER);
listener.Start();
Console.WriteLine("Server started on " + listener.LocalEndpoint);
Console.WriteLine("Waiting for a connection...");
Socket socket = listener.AcceptSocket();
Console.WriteLine("Connection received from " + socket.RemoteEndPoint);
byte[] data = new byte[BUFFER_SIZE];
socket.Receive(data);
VO acc = new VO();
acc = BUS.DeserializeData(data);
Console.WriteLine(acc.username + ":" + acc.password);
Class VO similar class Account, just another name alone sir
Where you have failed, you run your code view, what you see is not the stars that
Friend, làm bài viết hướng dẫn về lập trình mạng đi 😀
Thank you, nhưng mình không theo c# nữa nên rất tiếc ko giúp bạn đk.