ListItem Updating事件监视有没有上传附件

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



   }

        }                           

        }

     }

}

　　我之前也以为能用item.Attachment.count去监视，后来发现这个时候都还是正在更新，并不能监视此时有没有附件。

所以用HttpContext.Current;来监视是最好的，因为它可以监视上传流。