Simplest way to Create and Deploy Web Services

Introduction

Tools Used: .net SDK

How to use: This article explains how to create and deploy a simple webservice .
To use the sample code, one needs to have .net SDK installed. A text editor is enough to build and test the codes.

Creating a Simple Web Service

1. Create a folder named Webservice under wwwroot.
2. Create a File
   
   <%@ WebService Language="c#" Class="AddNumbers"%>
   using System;
   using System.Web.Services;
   public class AddNumbers : WebService
   {
   [WebMethod]
   public int Add(int a, int b)
   {
   int sum;
   sum = a + b;
   return sum;
   }
   }
3. Save this file as AddService.asmx [asmx-> file extension]
4. Now the webservice is created and ready for the clients to use it.
5. Now we can call this webservice using http://ip address/Webservice/Addservice.asmx/Add?a=10&b=5

This will return the result in XML format.

Deploying the Web Service on the Client Machine

1. At the command prompt:
   WSDL http://ip address ofthe site/WebService/MathService.asmx /n:NameSp /out:FileName.cs
   This will create a file called FileNmame.cs.
   
   WSDL -> WebServices Description Language (This is an application available at C:\Program  Files\Microsoft.NET\FrameworkSDK\Bin)
   
   NameSp -> Name of the NameSpace which will be used in client code for deploying the webservice.
   
   
2. Compilation
   CSC /t:library /r:system.web.dll /r:system.xml.dll CreatedFile.cs
   This will create a dll with the name of the public class of the asmx file.(In our case,  it is "AddNumbers.dll").
   CSC is an application available at C:\WINNT\Microsoft.NET\Framework\v1.0.2914
   
   
3. Put the dll file inside WWWRooT\BIN [Create a BIN Folder in WWWRoot].

Making use of WebService in client asp/aspx page

<%@ import Namespace = "NameSp" %>
<script language = "c#" runat = "server">
public void Page_Load(object o, EventArgs e){
int x = 10;
int y = 5;
int sum;
//Instantiating the public class of the webservice
AddNumbers AN = new AddNumbers();
sum = AN.Add(x,y);
string str = sum.ToString();
response.writeline(str);
}
</script>

Note: It is advisable to

1. Copy the .asmx file to the folder containing WSDL aplication (C:\Program  Files\Microsoft.NET\FrameworkSDK\Bin) before creating cs file.
   
   
2. Copy the created .cs file to the folder containing CSC application (C:\WINNT\Microsoft.NET\Framework\v1.0.2914) before compliling it.