调用 Send 方法之前必须设置 Path 属性。

[Pokeeeer]

public void DownloadAttachments(string itemID, string folder)
        {
            ExchangeServiceBinding esb = new ExchangeServiceBinding();
            PathToUnindexedFieldType[] ptufta = new PathToUnindexedFieldType[2];

            ptufta[0] = new PathToUnindexedFieldType();
            ptufta[0].FieldURI = UnindexedFieldURIType.itemAttachments;
            ptufta[1] = new PathToUnindexedFieldType();
            ptufta[1].FieldURI = UnindexedFieldURIType.itemHasAttachments;

            ItemResponseShapeType irst = new ItemResponseShapeType();

            irst.BaseShape = DefaultShapeNamesType.IdOnly;
            irst.AdditionalProperties = ptufta;

            ItemIdType[] biita = new ItemIdType[1];

            biita[0] = new ItemIdType();
            biita[0].Id = itemID;

            //get the items

            GetItemType git = new GetItemType();

            git.ItemShape = irst;
            git.ItemIds = biita;

            GetItemResponseType girt = esb.GetItem(git);//这句抛出异常：调用 Send 方法之前必须设置 Path 属性。

            if (girt.ResponseMessages.Items[0].ResponseClass != ResponseClassType.Success)
                return;

             /*…………………………………………*/

有人知道是什么问题吗？

[Pokeeeer]

自己顶一下。。。