按日期获取Exchange EWS托管API 2.0 [英] Exchange EWS Managed API 2.0 get by date

问题描述

我正在使用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. 从现在起和三天前，我都使用此代码来获取收件箱中的所有邮件.

Im using EWS Managed API to communicate between my c# project and our Exchange 2010 server. I use this code to get all mails in the inbox from now and three days back.

    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);

现在是问题所在.我想改进此行if (item.DateTimeCreated < DateTime.Now.AddDays(-3)) continue;，因为当我使用此行时，api从收件箱中获取所有消息，并且如果它的年龄超过三天，则继续.我想在代码的前面指定此过滤器，因此api不必处理所有消息.

Now the problem. I want to improve this line if (item.DateTimeCreated < DateTime.Now.AddDays(-3)) continue; because when i use this, the api gets all the messages from inbox and just continue if its older then three days. I want specify this filter earlier in the code, so the api dont have to handle all messages.

推荐答案

如果我正确理解了该问题，则应该可以使用.您可以在此处查看所有可用的搜索过滤器: EWS搜索过滤器

If I understand the problem correctly, this should work. You can see all search filters available here: EWS Search Filters

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);

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