Downloading SharePoint List Item Attachments as Zip file

Downloading SharePoint List Item Attachments as Zip file

Using the Ionic DotNetZip library in the following location

http://dotnetzip.codeplex.com/

The following is the code required to do this

 SPListItem item = List.GetItemById(ID);  
 SPAttachmentCollection attachmentCollection = item.Attachments;  
 Response.Clear();  
 string archiveName = String.Format("archive-{0}.zip", DateTime.Now.ToString("yyyy-MMM-dd-HHmmss"));  
 Response.ContentType = "application/zip";  
 Response.AddHeader("content-disposition", "filename=" + archiveName);  
 using (ZipFile zip = new ZipFile())  
 {  
   foreach (string filename in attachmentCollection)  
   {  
     SPFile file = web.GetFile(attachmentCollection.UrlPrefix + filename);  
     Stream stream = file.OpenBinaryStream();  
     zip.AddEntry(file.Name, stream);  
   }  
   zip.Save(Response.OutputStream);  
   Response.Flush();  
 }  
 Response.Close();