Sample: How to get the number of file attachments with EWS.

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Since HasAttachments does not really give you the number of file attachments, we you will find that you need to work around it. You can use code like that below to get the real count of file attachments on an item.

    // -----------------------------------------------------------------------------------------

    // GetFileAttachmentsCount

    // Returns number of attachments on an item.

    // -----------------------------------------------------------------------------------------

    public static int GetFileAttachmentsCount(ExchangeServiceBinding binding, ItemIdType id)

    {

        int iAttachmentCount = 0;

        // Use GetItem on the Id to get the Attachments collection

        GetItemType getItemRequest = new GetItemType();

        getItemRequest.ItemIds = new ItemIdType[] { id };

        getItemRequest.ItemShape = new ItemResponseShapeType();

        getItemRequest.ItemShape.BaseShape = DefaultShapeNamesType.AllProperties;

        PathToUnindexedFieldType hasAttachPath = new PathToUnindexedFieldType();

        hasAttachPath.FieldURI = UnindexedFieldURIType.itemHasAttachments;

        PathToUnindexedFieldType attachmentsPath = new PathToUnindexedFieldType();

        attachmentsPath.FieldURI = UnindexedFieldURIType.itemAttachments;

        // Add additional properties?

        getItemRequest.ItemShape.AdditionalProperties = new BasePathToElementType[]{

             hasAttachPath, attachmentsPath };

        GetItemResponseType getItemResponse = binding.GetItem(getItemRequest);

        ItemInfoResponseMessageType getItemResponseMessage = getItemResponse.ResponseMessages.Items[0] as ItemInfoResponseMessageType;

        if (getItemResponseMessage.ResponseCode == ResponseCodeType.NoError)

        {

            ItemType item = getItemResponseMessage.Items.Items[0];

            // Don't rely on HasAttachments - It does not mean what you thing it would.

            if ((item.Attachments != null) && (item.Attachments.Length > 0))

            {

                for (int attachmentIndex = 0; attachmentIndex < item.Attachments.Length; attachmentIndex++)

                {

                    FileAttachmentType almostAnAttachment = item.Attachments[attachmentIndex] as FileAttachmentType;

                    if (almostAnAttachment != null)

                    {

                        iAttachmentCount += 1;

                    }

                }

            }

        }

        return iAttachmentCount;

    }