Building Web Services Using Microsoft.net, by Jonathan Cortez
WSJ Vol 01 Issue 01 - pg.49

	


Listing 1   Class contained in the same .asmx file

<% @WebService Language="C#" Class="FooBar" %>
using System.Web.Services;
public class FooBar
{
  [ WebMethod ]
  public string GetMessage()
  {
    return "This class is contained in the same .asmx file.";
  }
}

Listing 2   Class contained in a separate assembly


In FooBar.asmx:

<% @WebService Language="C#" Class="FooBar,MyAssembly" %>


In MyAssembly.cs:

using System.Web.Services;
public class FooBar
{
  [ WebMethod ]
  public string GetMessage()
  {
    return "This class is contained in a separate assembly.";
  }
}


Listing 3   Overriding the default XML namespace


<% @WebService Language="C#" Class="FooBar" %>
using System.Web.Services;
[ WebService(Namespace="http://www.mycompanyname.com/") ]
public class FooBar
{
  [ WebMethod ]
  public string Hello()
  {
    return "Hello Web Services.";
  }
}

Listing 4   Defining Web service methods


<% @WebService Language="C#" Class="FooBar" %>
using System.Web.Services;
public class FooBar
{
  [ WebMethod(Description="Returns a greeting to the caller.") ]
  public string Hello()
  {
    return "Hello Web Services.";
  }

  public string DoSomeWork()
  {
    return "I did some work."
  }
}

Listing 5  Calculator Web service (Calculator.asmx)


<%@ WebService Language="C#" Class="Calculator" %>
using System.Web.Services;
[ WebService(Namespace="http://www.us.cgey.com/webservices/calculator") ]
public class Calculator
{
  [ WebMethod(Description="Returns the sum of two numbers.") ]
  public long Add(long lNum1, long lNum2)
  {
    return lNum1 + lNum2;
  }

  [ WebMethod(Description="Returns the difference of two numbers.") ]
  public long Subtract(long lNum1, long lNum2)
  {
    return lNum1 - lNum2;
  }

  [ WebMethod(Description="Returns the product of two numbers.") ]
  public long Multiply(long lNum1, long lNum2)
  {
    return lNum1 * lNum2;
  }

  [ WebMethod(Description="Returns the quotient of two numbers.") ]
  public long Divide(long lNum1, long lNum2)
  {
    return lNum1 / lNum2;
  }
}

 Listing 6     Calculator Web service client (CalculatorClient.cs)
 

using System;
public class CalculatorClient
{
  public static void Main()
  {
    // Create the proxy
    Calculator oCalcProxy = new Calculator();

    // Invoke the Multiply method and display results on the screen
    Console.WriteLine("4 X 4 = " + oCalcProxy.Multiply(4, 4));
  }
}