Exchange EWS托管API 2.0按日期获取

Question

我使用EWS托管API在我的c#项目和我们的Exchange 2010服务器之间进行通信.我使用此代码从现在起和三天前收到收件箱中的所有邮件.

    var ews = new ExchangeService(ExchangeVersion.Exchange2010_SP1);
    ews.Credentials = new NetworkCredential(usr, psw, dmn);
    ews.AutodiscoverUrl(url);

    PropertySet itempropertyset = new PropertySet(BasePropertySet.FirstClassProperties);
    itempropertyset.RequestedBodyType = BodyType.Text;

    ItemView view = new ItemView(int.MaxValue);
    FindItemsResults<Item> findResults;
    view.PropertySet = itempropertyset;

    do
    {
        findResults = ews.FindItems(WellKnownFolderName.Inbox, view);

        foreach (Item item in findResults.Items)
        {
            if (item.DateTimeCreated < DateTime.Now.AddDays(-3)) continue;

            item.Load(itempropertyset);

            var message = EmailMessage.Bind(ews, item.Id,
                new PropertySet(BasePropertySet.FirstClassProperties, ItemSchema.Attachments));

            string to = message.ToRecipients[0].Address.ToLower();
            string body = item.Body;
        }

        view.Offset += findResults.TotalCount;
    } while (findResults.MoreAvailable);

现在问题.我想改进这一行, if (item.DateTimeCreated < DateTime.Now.AddDays(-3)) continue;因为当我使用它时,api从收件箱中获取所有消息,如果它比旧的那么三天就继续.我想在代码中先前指定此过滤器,因此api不必处理所有消息.

Answer 1

如果我正确理解了问题,这应该可行.您可以在此处查看所有可用的搜索过滤器: EWS搜索过滤器

ItemView view = new ItemView(int.MaxValue);
FindItemsResults<Item> findResults;
view.PropertySet = itempropertyset;

SearchFilter searchFilter = 
   new SearchFilter.IsGreaterThan(ItemSchema.DateTimeReceived, DateTime.Now.AddDays(-3));

findResults = service.FindItems(WellKnownFolderName.Inbox, searchFilter, view);