[Tutorial] Simple Command Prompt Responder 22 posts

OP Thu Jul 19, 2012 1:48 am
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This is meant for C#

Code
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Lab2TakeInputData
{
    /* This program takes input of name
     * it then takes age input
     * Finally displays it as one statement
     */
    class Program
    {
        static void Main(string[] args)
        {
            // this line displays enter your name
            Console.WriteLine("Enter your name ");
            // this line takes input from the end user
            string SomeDatafromUser = Console.ReadLine();
            try
            {
                // this line checks if the name is not greater than 10
                if (SomeDatafromUser.Length > 10)
                {
                    throw new Exception("Your name should not be greater than 10 characters");
                }
                // this line displays enter your age text
                Console.WriteLine("Enter your age");
                int Age = 0;
                // this line takes age input
                Age = Convert.ToInt16(Console.ReadLine());
                // this line displays the complete statement with data entered
                Console.WriteLine("Hello Mr " + SomeDatafromUser + " your age is " + Age);
                Console.ReadLine();
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message.ToString());
            }
        }
    }
}
Sun Jan 27, 2013 7:35 pm
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I miss C++ I learned it when I was in school, then I left school and forgot it.
Sat Jun 08, 2013 9:20 am
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nice, lets try different things
I recreated your program using some object oriented concepts
im opent to questions

Code
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Lab2TakeInputData
{

 class User // our class
    {
        private string Name; // the name field
        private int Age; // the age field

        public string UserName // the Name property
        {
            get
            {
                return Name;
            }
            set
            {
                Name = value;
            }
        }

        public int UserAge // the age property
        {
            get
            {
                return Age;
            }
            set
            {
                Age = value;
            }
        }
    }

    class Program
    {
        static void Main(string[] args)
        {
            User ImvuMafiasUser = new User(); //creates a new object of class user

            // this line displays enter your name
            Console.WriteLine("Enter your name ");
            // this line takes input from the end user
            ImvuMafiasUser.UserName = Console.ReadLine(); //assign the name to our object's name
            try
            {
                // this line checks if the name is not greater than 10
                if (ImvuMafiasUser.UserName.Length > 10)
                {
                    throw new Exception("Your name should not be greater than 10 characters");
                }
                // this line displays enter your age text
                Console.WriteLine("Enter your age");
               
                // this line takes age input
                ImvuMafiasUser.UserAge = Convert.ToInt16(Console.ReadLine()); //assign the age to our object's age
                // this line displays the complete statement with data entered
                Console.WriteLine("Hello Mr " + ImvuMafiasUser.UserName + " your age is " + ImvuMafiasUser.UserAge);
                Console.ReadLine();
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message.ToString());
            }
        }
    }


}
Sat Jun 08, 2013 9:38 am
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Anyone care to explain what a Command Prompt Responder is?

A command prompt Responder is simply a program that displays and accepts text through a command prompt.
In this case, the program accepts a person's name and age.
Then it displays the user's name and age back to them in a full sentence.
Sat Jun 08, 2013 10:16 am
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thank you Don Von.
I think it makes more sense to rebuild this program as a client-server application. I can do that if anyone is interested
Sat Jun 08, 2013 7:17 pm
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Elie wrote:
thank you Don Von.
I think it makes more sense to rebuild this program as a client-server application. I can do that if anyone is interested


Would the server side application be in C# or in a scripting language?
Sat Jun 08, 2013 8:15 pm
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Don Von Free Credits wrote:
Would the server side application be in C# or in a scripting language?



actually I had C# in mind as we're in the C section
but I can make another version using scripting languages if you like.
Sat Jun 08, 2013 8:28 pm
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I am glad to see some activity in the programming section. lets see a lot more!
Sun Jun 09, 2013 4:04 am
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Elie wrote:
Don Von Free Credits wrote:
Would the server side application be in C# or in a scripting language?



actually I had C# in mind as we're in the C section
but I can make another version using scripting languages if you like.


Which ever you think would be the most useful. I am not sure how to run c# on our server, nor the effect it would have on our server load.
Wed Jul 03, 2013 4:48 pm
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sorry, for the late reply .. i had a very busy month >.<

Which ever you think would be the most useful. I am not sure how to run c# on our server, nor the effect it would have on our server load.

I wasn't thinking of running the server online, lets just run it locally first

I just wrote this code and tested it and please feel free to ask me, we need to open two project A. a server , B. a client

Our Server
Code
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net;
using System.Net.Sockets;

namespace Server
{
    class Program
    {
        static void Main(string[] args)
        {
            int recv;
            byte[] data = new byte[1024];
            string[] input = new string[2];
            string stringData;

            IPEndPoint ipep = new IPEndPoint(IPAddress.Any,9050); // Defining the IP and port we're gonna use to listen to clients
            Socket newsock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); // Preparing our socket to use TCP protocol
            newsock.Bind(ipep); // bind the socket to the ip & port
            newsock.Listen(10); // listen to Clients

            Console.WriteLine("Waiting for a client...");
            Socket client = newsock.Accept(); // once a client connects, accept it and return a socket
            IPEndPoint clientep =(IPEndPoint)client.RemoteEndPoint; // obtain client info
            Console.WriteLine("Connected with {0} at port {1}",clientep.Address, clientep.Port); // displaying info

            string welcome = "Welcome to my test server"; // preparing a welcome message
            data = Encoding.ASCII.GetBytes(welcome); // encoding it into bytes
            client.Send(data, data.Length, SocketFlags.None); // send to client

            // Conversation with Server could be in a while loop, in our example its just sending name and age and recieving it
            ////////////////////////////////////////////
                data = new byte[1024];
                recv = client.Receive(data); // recieve from client
                stringData = Encoding.ASCII.GetString(data, 0, recv);
                input = stringData.Split(','); // split the message when seeing ','
                stringData="Hello " + input[0] + " your age is " + input[1]; // re create the message such as : Hello X your age is Y

                data = Encoding.ASCII.GetBytes(stringData);
                client.Send(data, data.Length, SocketFlags.None); // send to client
            ////////////////////////////////////////////

            Console.WriteLine("Disconnected from {0}",
            clientep.Address);
            client.Close();
            newsock.Close();
        }
    }
}

Our Client
Code
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net;
using System.Net.Sockets;

namespace Client
{
    class Program
    {
        static void Main(string[] args)
        {
            byte[] data = new byte[1024];
            string input, stringData;

            IPEndPoint ipep = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 9050);// Defining the IP and port we're gonna use to listen to connect to the server
            // 127.0.0.1 is loopback localhost , so if you are going to run this different machines you need to replace it with the IP of the other machine running the server
            Socket server = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);// Preparing our socket to use TCP protocol

            try
            {
                server.Connect(ipep); // trying to connect to server
            } catch (SocketException e) // if failed
            {
                Console.WriteLine("Unable to connect to server.");
                Console.WriteLine(e.ToString());
                return;
            }

            int recv = server.Receive(data); // get the welcome message from the Server
            stringData = Encoding.ASCII.GetString(data, 0, recv); // Encode it
            Console.WriteLine(stringData); // Display it

            // Conversation with Server could be in a while loop, in our example its just sending name and age and recieving it
            ////////////////////////////////////////////
                Console.WriteLine("Enter your name "); // enter name
                input = Console.ReadLine();
                Console.WriteLine("Enter your age "); // enter age
                input += "," + Console.ReadLine(); // form them in one output
               
                server.Send(Encoding.ASCII.GetBytes(input)); // send to server

                data = new byte[1024];
                recv = server.Receive(data); //recieve from server
                stringData = Encoding.ASCII.GetString(data, 0, recv); //encode to string
                Console.WriteLine(stringData); // display
            ////////////////////////////////////////////

            Console.WriteLine("Disconnecting from server...");
            server.Shutdown(SocketShutdown.Both);
            server.Close();
        }
    }
}



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