Introduction:
Here I am creating a web service to describe
method overloading in a web service. I am creating two functions with the same name: add. First add function has two integer parameters and second add method has
three. Now we create a web services. Create a web service application and write
the following code.
using
System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Web;
using
System.Web.Services;
namespace
WebService1
{
/// <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 Service1 : System.Web.Services.WebService
{
[WebMethod]
public int
add(int a,int b)
{
return a+b;
}
[WebMethod]
public int
add(int a, int
b, int c)
{
return a + b + c;
}
}
}
Now run this service. You will note that it
will show an error message, like the below figure.
It will generate an error because the web service does not support method overloading
directly. We have to add the MessageName property to make difference between methods
and change [WebServiceBinding(ConformsTo
= WsiProfiles.BasicProfile1_1)]
to
[WebServiceBinding(ConformsTo =
WsiProfiles.None)].
So modify the code with adding the MessageName property as written below.
using
System;
using
System.Collections.Generic;
using
System.Linq;
using System.Web;
using
System.Web.Services;
namespace
WebService1
{
/// <summary>
///
Summary description for Service1
/// </summary>
[WebService(Namespace =
"http://tempuri.org/")]
[WebServiceBinding(ConformsTo =
WsiProfiles.None)]
[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 Service1 : System.Web.Services.WebService
{
[WebMethod(MessageName="twoparameter",Description="addition
of two integers")]
public int
add(int a,int b)
{
return (a + b);
}
[WebMethod(MessageName =
"threeparameter", Description =
"addition of three integers")]
public int
add(int a, int
b, int c)
{
return (a + b + c);
}
}
}
Run the service.
Output:
Now click at first add method. Give the value
for valiables and invoke the method. It will show the result. Look at below
figure.
After invoking the method.
Output:
