问如何使用EWS在ItemAttachment中获取附件

EN

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);
        }
    }
}