Download attachment from Exchange using Exchange Web Services

I am trying to use the following code to connect and download an attachment from email开发者_如何学JAVA in an inbox using C# and Exchange Web Services but I am getting a 'System.ArgumentOutOfRangeException' error and I cant see why. I have googled for an answer but i cant find one or the answers I find are for very old versions of EWS.

I know that the rest of the code generally works as I can access other information relating to the email, just not access the attachment.

Cany anyone show me the error of my ways?

Thanks in advance,

James

    static void Main(string[] args)
    {
        ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2007_SP1);
        service.Credentials = new NetworkCredential("MYLOGIN", "MYPASSWORD", "MYDOMAIN");

        service.Url = new Uri("https://MYMAILSERVER/EWS/Exchange.asmx");

        ServicePointManager.ServerCertificateValidationCallback = delegate { return true; };

        FindItemsResults<Item> findResults = service.FindItems(WellKnownFolderName.Inbox, new ItemView(1000));

        foreach (Item item in findResults.Items)
        {
            if (item.HasAttachments && item.Attachments[0] is FileAttachment)
            {
                FileAttachment fileAttachment = item.Attachments[0] as FileAttachment;
                fileAttachment.Load("C:\\temp\\" + fileAttachment.Name);
            }

        }
    }
}

Solved but new problem

I have sorted the issue now by changing the 'foreach (Item item in findResults.Items)' to 'foreach (EmailMessage item in findResults.Items)' but now I need to find out how to enumerate through the attachments - any ideas anyone?

Check your profile. If you're running on light mode, attachments are not being downloaded with message.

add following line

item.Load() // loads the entire message with attachment

The answer to your new problem is

    ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2007_SP1);

    //service.Credentials = new NetworkCredential( "{Active Directory ID}", "{Password}", "{Domain Name}" );

    service.AutodiscoverUrl("firstname.lastname@MyCompany.com");

        FindItemsResults<Item> findResults = service.FindItems(
           WellKnownFolderName.Inbox,
           new ItemView(10));

        foreach (Item item in findResults.Items)
        {
            Console.WriteLine(item.Subject);
            item.Load();
            if(item.HasAttachments)
            {
                foreach (var i in item.Attachments)
                {
                    FileAttachment fileAttachment = i as FileAttachment;
                    fileAttachment.Load();
                    Console.WriteLine("FileName: " + fileAttachment.Name);

                }
            }

        }

Unless I'm missing something obvious all you need to do is enumerable through item.Attachments.

Click here and scroll down to where you see the Example heading.

Solution for downloading all attachments from specified amount of emails:

  ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2013);
  service.Credentials = new NetworkCredential("login", "password");

  service.Url = new Uri("https://mail.Yourservername.com/EWS/Exchange.asmx");

  ServicePointManager.ServerCertificateValidationCallback = delegate { return true; };

  FindItemsResults<Item> findResults = service.FindItems(WellKnownFolderName.Inbox, new ItemView(10));

  if (findResults != null && findResults.Items != null && findResults.Items.Count > 0)
      foreach (EmailMessage item in findResults)
       {
         EmailMessage message = EmailMessage.Bind(service, item.Id, new PropertySet(BasePropertySet.IdOnly, ItemSchema.Attachments, ItemSchema.HasAttachments));
           foreach (Attachment attachment in message.Attachment
             {
               if (attachment is FileAttachment)
                  {
                    FileAttachment fileAttachment = attachment as FileAttachment;      
                    fileAttachment.Load(@"Folder\file.name");
                   }
             }
        }

Don't forget to pass correct version of Exchange Server to ExchangeService constructor.

This is a method GetAttachmentsFromEmail that you can use to download attachments.

public static void GetAttachmentsFromEmail(ExchangeService service, ItemId itemId)
    {
        // Bind to an existing message item and retrieve the attachments collection.
        // This method results in an GetItem call to EWS.
        EmailMessage message = EmailMessage.Bind(service, itemId, new PropertySet(ItemSchema.Attachments));

        // Iterate through the attachments collection and load each attachment.
        foreach (Attachment attachment in message.Attachments)
        {
            if (attachment is FileAttachment)
            {
                FileAttachment fileAttachment = attachment as FileAttachment;

                // Load the attachment into a file.
                // This call results in a GetAttachment call to EWS.
                fileAttachment.Load("C:\\temp\\" + fileAttachment.Name);

                Console.WriteLine("File attachment name: " + fileAttachment.Name);
            }
            else // Attachment is an item attachment.
            {
                ItemAttachment itemAttachment = attachment as ItemAttachment;

                // Load attachment into memory and write out the subject.
                // This does not save the file like it does with a file attachment.
                // This call results in a GetAttachment call to EWS.
                itemAttachment.Load();

                Console.WriteLine("Item attachment name: " + itemAttachment.Name);
            }
        }
    }