How to consume/use the Web Service from Application

}
}
}

How to consume the ASP.net Web Service

Now in .net we can have the Web Service written in ASP.net (.asmx) and use that in ASP.net or C# (windows) application.

First we will create the Web Service using ASP.net. You can create using the VS IDE or Simple in any text editor.

A Web Service Example

In the following example we will use ASP.NET to create a simple Web Service that converts the temperature from Fahrenheit to Celsius, and vice versa:

public class WebService : System.Web.Services.WebService {

public WebService () {

//Uncomment the following line if using designed components
//InitializeComponent();
}

[WebMethod]
public string HelloWorld() {
return "Hello World";
}

[WebMethod]
public int FahrenheitToCelsius(int far)
{
return ((((far) - 32) / 9) * 5);
}

[WebMethod]
public int CelsiusToFahrenheit(int cel)
{
return ((((cel) * 9) / 5) + 32);
}
}

This document is saved as an .asmx file. This is the ASP.NET file extension for XML Web Services.

So when you open the Web Service from the browser using the following

http://localhost:4834/WebSite1/WebService.asmx

You will see the below list of the methods which we made as the Web Method. This the web methods exposed by the Web Service. Now for to test, you can click on any method for e.g. CelciusToFarheneit, it will show you the next part where you can input the number and click on the Invoke button.

The Web service will then take that Input and convert the value from celcius to Far as show below in the next picture.





Output



How to Call the Web Service from ASP.net Application

To access the Web Service and exposed function, I am going to use the same approach as I did first time when accessing SOAP Web service. There are few other ways also but just to keep in sync I am using the same one.

You have to follow the Step 1 of the first section, and the following code

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 System.Xml;

namespace ConsumeWebService
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private void btnShow_Click(object sender, EventArgs e)
{
localhost.WebService call = new localhost.WebService();

call.Url = "http://localhost:4834/WebSite1/WebService.asmx";
call.UseDefaultCredentials = true;
int far = call.CelsiusToFahrenheit(30);
int cel = call.FahrenheitToCelsius(86);
StringBuilder result = new StringBuilder();
result.Append("30 Celcius = " + far + " Fahrenheit");
result.AppendLine();
result.Append("86 Fahrenheit = " + cel + " Celcius");
textBox1.Text = result.ToString();

}
}
}