C# Program to Establish Client Server Relationship

This C# Program Establishes Client Server Relationship. Here this explains as how a relationship is established between server and a client.

Here is source code of the C# Program to Establish Client Server Relationship. The C# program is successfully compiled and executed with Microsoft Visual Studio. The program output is also shown below.

```
/*
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 * C# Program to Establish Client Server Relationship

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 */
```
```
//SERVER PROGRAM
```
```
using System;
```
```
using System.Collections.Generic;
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using System.Linq;
```
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using System.Text;
```
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using System.Net;
```
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using System.Net.Sockets;
```
```
namespace Server336
```
```
{
```
```
    class Program
```
```
    {
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        static void Main(string[] args)
```
```
        {
```
```
            try
```
```
            {
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                IPAddress ipAd = IPAddress.Parse("10.18.227.162");

                TcpListener myList = new TcpListener(ipAd, 8001);

```
                myList.Start();
```

                Console.WriteLine("The server is running at port 8001...");

                Console.WriteLine("The local End point is  :" + myList.LocalEndpoint);

                Console.WriteLine("Waiting for a connection.....");

                Socket s = myList.AcceptSocket();

                Console.WriteLine("Connection accepted from " + s.RemoteEndPoint);

                byte[] b = new byte[100];

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                int k = s.Receive(b);
```

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

                for (int i = 0; i < k; i++)

```
                {
```

                    Console.Write(Convert.ToChar(b[i]));

```
                }
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                ASCIIEncoding asen = new ASCIIEncoding();

                s.Send(asen.GetBytes("The string was recieved by the server."));

                Console.WriteLine("\nSent Acknowledgement");

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                s.Close();
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                myList.Stop();
```
```
            }
```
```
            catch (Exception e)
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```
            {
```

                Console.WriteLine("Error..... " + e.StackTrace);

```
            }
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```
            Console.ReadLine();
```
```
        }
```
```
    }
```
```
}
```
```
 
```
```
//CLIENT PROGRAM
```
```
using System;
```
```
using System.Collections.Generic;
```
```
using System.Linq;
```
```
using System.Text;
```
```
using System.IO;
```
```
using System.Net;
```
```
using System.Text;
```
```
using System.Net.Sockets;
```
```
 
```
```
namespace Client336
```
```
{
```
```
    class Program
```
```
    {
```
```
        static void Main(string[] args)
```
```
        {
```
```
            try
```
```
            {
```

                TcpClient tcpclnt = new TcpClient();

                Console.WriteLine("Connecting.....");

                tcpclnt.Connect("10.18.227.162", 8001);

                Console.WriteLine("Connected");

                Console.Write("Enter the string to be transmitted : ");

                String str = Console.ReadLine();

                Stream stm = tcpclnt.GetStream();

                ASCIIEncoding asen = new ASCIIEncoding();

                byte[] ba = asen.GetBytes(str);

                Console.WriteLine("Transmitting.....");

                stm.Write(ba, 0, ba.Length);

                byte[] bb = new byte[100];

                int k = stm.Read(bb, 0, 100);

                for (int i = 0; i < k; i++)

                    Console.Write(Convert.ToChar(bb[i]));

```
                tcpclnt.Close();
```
```
                Console.Read();
```
```
            }
```
```
            catch (Exception e)
```
```
            {
```

                Console.WriteLine("Error..... " + e.StackTrace);

```
            }
```
```
        }
```
```
    }
```
```
}
```

Here is the output of the C# Program:

Sanfoundry Global Education & Learning Series – 1000 C# Programs.

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