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Consuming a Web Service in a Windows Application - 2nd Method

Posted by A K Articles | Web Services in C# November 28, 2011
In this article you will learn to use a web service in a windows application.
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Introduction:

Here, we will learn to consume/use a web service in a windows application. This is the second method by which we can use a web service in a windows application ( You can get the first method here). First we should have a web service, so let's create a simple web service. Create an ASP.NET Web Service page
and modify the code as given below.


using
System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Web;
using
System.Web.Services;
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]

// 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 Service : System.Web.Services.WebService
{
    public Service () { 
       
//Uncomment the following line if using designed components
       
//InitializeComponent();
    } 
    [WebMethod(Description="Show Message")]
    public string msgshow()
    {
        return "Hello, Web Service...";
    } 
    [WebMethod(Description="Addition Of Two Integers")]
    public int add(int a, int b)
    {
        return a + b;
    }
}

Run the service.

Output:

consuming web service in window application

To consume the web service in a windows form application, follow the given steps.
 

  • Create a Windows Form Application.
  • Go to Solution Explorer and right click on your project. A pop-up menu will open.
consuming web service in window application

  • Select Add Service Reference. A new window will open like the below figure.

 consuming web service in window application

  • Click on Advanced ( Look at above figure). A new window will open like the below figure.
     

consuming web service in window application

  •  Click on Add Web Reference.


consuming web service in window application

  •  Copy the URL of your running web service and paste it at the URL (Look at the above figure.) and Click the Go button. A new window will open like the below figure.

consuming web service in window apllication

  •  Click Add Reference. Now Service Reference has been added to your project. Create some controls on the design page and write code to call the methods of your web service.

using System;
using
System.Collections.Generic;
using
System.ComponentModel;
using
System.Data;
using
System.Drawing;
using
System.Linq;
using
System.Text;
using
System.Windows.Forms;
 

namespace
consumingwebservice
{
    public partial class Form1 :
Form
    {
        public Form1()
        {
            InitializeComponent();
        }
         private void btnadd_Click(object sender, EventArgs e)
        {
            localhost.Service obj = new localhost.Service();
            txtresult.Text = obj.add(Convert.ToInt32(txtfirstno.Text), Convert.ToInt32(txtsecondno.Text)).ToString();
        }
        private void btnmsgshow_Click(object sender, EventArgs e)
        {
            localhost.Service obj = new localhost.Service();
            MessageBox.Show(obj.msgshow());
        }
    }
}
 

You can write the same code in another way by adding NameSpace as YourProjectName.Webreferencename. Look below the full code for this example after adding namespace.

using System;
using
System.Collections.Generic;
using
System.ComponentModel;
using
System.Data;
using
System.Drawing;
using
System.Linq;
using
System.Text;
using
System.Windows.Forms;
using
consumingwebservice.localhost;

namespace
consumingwebservice
{
    public partial class Form1 :
Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void btnadd_Click(object sender, EventArgs e)
        {
            localhost.Service obj = new localhost.Service();
            txtresult.Text = obj.add(Convert.ToInt32(txtfirstno.Text), Convert.ToInt32(txtsecondno.Text)).ToString();
        }
        private void btnmsgshow_Click(object sender, EventArgs e)
        {
            Service obj = new Service();
            MessageBox.Show(obj.msgshow());
        }
    }
}

Run the windows application.

Output:

consuming web service in window application

Write the first and second number and click the "Add" button.

uging web service in window application

Click the "Message Show" button.

consuming web service in window application

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