Create a asp.net webservice and invoke using client.

In this article we are going to see the how to create a web service and invoke a web service from the client.
Create a new project with web service as template. in these we are creating a two methods which will have to do the maths operation.

Web Service :

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.Services;

using System.Runtime.Remoting.Messaging;

using System.Web.Services.Protocols;

using System.IO;

using System.Threading;

namespace MathService

{

    /// <summary>

    /// Summary description for Service1

    /// </summary>

    [WebService(Namespace = "http://tempuri.org/")]

    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]

    [System.ComponentModel.ToolboxItem(false)]

    // To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line.

    [System.Web.Script.Services.ScriptService]

    public class MathService : System.Web.Services.WebService

    {

        [WebMethod]

        public int Add(params int[] values)

        {

            return values.Sum();

        }

        [WebMethod]

        public int Sub(int a,int b)

        {

            return a - b;

        }

    }

}

Host the application in the IIS and launch the in the web browser.

Client:
Create a new project with the console application.Add the web reference and name it as Maths.

namespace InvokeWebService

{

    class Program

    {

        static void Main(string[] args)

        {

            Maths.MathService websrv = new Maths.MathService();

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

            int addvalue = websrv.Add(new int[] { 3,2,6,7});

            Console.WriteLine(" Add Operation result : " + addvalue);

            int subvalue = websrv.Sub(4, 2);

            Console.WriteLine(" Sub Operation result :" + subvalue);

            Console.WriteLine("Done");

            Console.Read();

        }

    }

}

Output:
Connecting service . . .
 Add Operation result : 18
 Sub Operation result :2
Done

From this article you can learn how to create the service and invoke it from the client.