using System;

using System.Collections.Generic;

using System.Text;

using Microsoft.SharePoint;

using System.Web;

namespace MyProject.Features

{

    public class MyEventReceiver : SPItemEventReceiver

    {

        HttpContext currentContext;

        public MyEventReceiver()

        {

            currentContext = HttpContext.Current;

        }

        public override void ItemAdding(SPItemEventProperties properties)

        {

  if (currentContext != null)

        {

          if (currentContext.Request.Files.Count > 0)

          {

            // there are attachments

          }

   else

   {

            // there are no attachments

   }

        }

        }

     }

}