using System;
using System.Linq;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.Xml.Linq;
using System.Threading;
using System.Runtime.Remoting.Messaging;

public delegate int Comuter(int a, int b);

public delegate void DivCompleteHandler(object sender, DivCompleteEventArgs e);

[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
// 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 DivideService : System.Web.Services.WebService
{
    public event DivCompleteHandler OnDivComplete;


    public DivideService()
    {

    }

    [WebMethod]
    public int Div(int a, int b)
    {
        Thread.Sleep(10000);

        try
        {
            return a / b;
        }
        catch (DivideByZeroException e)
        {
            throw e;
        }
    }

    [WebMethod]
    public  void DivAsyn(int a, int b)
    {
        Comuter computer = new Comuter(this.Div);
        computer.BeginInvoke(a, b, new AsyncCallback(Response), null);
    }

     void Response(IAsyncResult result)
    {
        try
        {
            Comuter computer = ((AsyncResult)result).AsyncDelegate as Comuter;

            if (null != computer)
            {
                int consult = computer.EndInvoke(result);
                OnDivComplete(this, new DivCompleteEventArgs(consult, null, false, null));
            }
        }
        catch (DivideByZeroException e)
        {
            OnDivComplete(this, new DivCompleteEventArgs(0, e, true, null));
        }
        catch (Exception e)
        {
            OnDivComplete(this, new DivCompleteEventArgs(0, e, true, null));
        }

    } 
}