/*
C# Network Programming
by Richard Blum
Publisher: Sybex
ISBN: 0782141765
*/
using System;
using System.Text;
using System.Net;
using System.Net.Sockets;
public class EmployeeClient
{
public static void Main()
{
Employee emp1 = new Employee();
Employee emp2 = new Employee();
TcpClient client;
emp1.EmployeeID = 1;
emp1.LastName = "Blum";
emp1.FirstName = "Katie Jane";
emp1.YearsService = 12;
emp1.Salary = 35000.50;
emp2.EmployeeID = 2;
emp2.LastName = "Blum";
emp2.FirstName = "Jessica";
emp2.YearsService = 9;
emp2.Salary = 23700.30;
try
{
client = new TcpClient("127.0.0.1", 9050);
} catch (SocketException)
{
Console.WriteLine("Unable to connect to server");
return;
}
NetworkStream ns = client.GetStream();
byte[] data = emp1.GetBytes();
int size = emp1.size;
byte[] packsize = new byte[2];
Console.WriteLine("packet size = {0}", size);
packsize = BitConverter.GetBytes(size);
ns.Write(packsize, 0, 2);
ns.Write(data, 0, size);
ns.Flush();
data = emp2.GetBytes();
size = emp2.size;
packsize = new byte[2];
Console.WriteLine("packet size = {0}", size);
packsize = BitConverter.GetBytes(size);
ns.Write(packsize, 0, 2);
ns.Write(data, 0, size);
ns.Flush();
ns.Close();
client.Close();
}
}
public class Employee
{
public int EmployeeID;
private int LastNameSize;
public string LastName;
private int FirstNameSize;
public string FirstName;
public int YearsService;
public double Salary;
public int size;
public Employee()
{
}
public Employee(byte[] data)
{
int place = 0;
EmployeeID = BitConverter.ToInt32(data, place);
place += 4;
LastNameSize = BitConverter.ToInt32(data, place);
place += 4;
LastName = Encoding.ASCII.GetString(data, place, LastNameSize);
place = place + LastNameSize;
FirstNameSize = BitConverter.ToInt32(data, place);
place += 4;
FirstName = Encoding.ASCII.GetString(data, place, FirstNameSize);
place += FirstNameSize;
YearsService = BitConverter.ToInt32(data, place);
place += 4;
Salary = BitConverter.ToDouble(data, place);
}
public byte[] GetBytes()
{
byte[] data = new byte[1024];
int place = 0;
Buffer.BlockCopy(BitConverter.GetBytes(EmployeeID), 0, data, place, 4);
place += 4;
Buffer.BlockCopy(BitConverter.GetBytes(LastName.Length), 0, data, place, 4);
place += 4;
Buffer.BlockCopy(Encoding.ASCII.GetBytes(LastName), 0, data, place, LastName.Length);
place += LastName.Length;
Buffer.BlockCopy(BitConverter.GetBytes(FirstName.Length), 0, data, place, 4);
place += 4;
Buffer.BlockCopy(Encoding.ASCII.GetBytes(FirstName), 0, data, place, FirstName.Length);
place += FirstName.Length;
Buffer.BlockCopy(BitConverter.GetBytes(YearsService), 0, data, place, 4);
place += 4;
Buffer.BlockCopy(BitConverter.GetBytes(Salary), 0, data, place, 8);
place += 8;
size = place;
return data;
}
}
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