Any application can have a Web Service component.
Web Services can be created regardless of programming language.
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:
This document is saved as an .asmx file. This is the ASP.NET file extension for XML Web Services.
Note: To run this example, you will need a .NET server.
The first line in the example states that this is a Web Service, written in VBScript, and has the class name "TempConvert":
The next lines import the namespace "System.Web.Services" from the .NET framework:
The next line defines that the "TempConvert" class is a WebService class type:
The next steps are basic VB programming. This application has two functions. One to convert from Fahrenheit to Celsius, and one to convert from Celsius to Fahrenheit.
The only difference from a normal application is that this function is defined as a "WebMethod()".
Use "WebMethod()" to convert the functions in your application into web services:
Then, end the class:
Publish the .asmx file on a server with .NET support, and you will have your first working Web Service.
Look at our example Web Service
With ASP.NET, you do not have to write your own WSDL and SOAP documents.
If you look closer at our example Web Service, you will see that ASP.NET has automatically created a WSDL and SOAP request.