[英]Search by category Exchange Server EWS
我需要獲取所有具有特定類別名稱的電子郵件,我該怎么做?
現在我有這個:
var col = new List<SearchFilter>();
col.Add(new SearchFilter.ContainsSubstring(ItemSchema.Categories, "Processed"));
var filter = new SearchFilter.SearchFilterCollection(LogicalOperator.Or, col.ToArray());
FindItemsResults<Item> findResults = service.FindItems(
WellKnownFolderName.Inbox,
filter,
new ItemView(10)
);
但這給了我一個Microsoft.Exchange.WebServices.Data.ServiceResponseException
說{"The Contains filter can only be used for string properties."}
我該怎么做?
AFAIK 從 Exchange 2010 開始,類別是一個多值字段,因此它不適用於搜索過濾器。 但是,您可以使用AQS搜索類別。 下面的代碼應該可以解決問題。
ExchangeService service = GetService();
var iv = new ItemView(1000);
string aqs = "System.Category:Processed";
FindItemsResults<Item> searchResult = null;
do
{
searchResult = service.FindItems(WellKnownFolderName.Inbox, aqs, iv);
foreach (var item in searchResult.Items)
{
Console.WriteLine(item.Subject);
}
iv.Offset += searchResult.Items.Count;
} while (searchResult.MoreAvailable == true);
我使用以下代碼來查找所有未設置“已處理”類別且在給定日期之后收到的消息。
SearchFilter sf = new SearchFilter.SearchFilterCollection(LogicalOperator.And,
new SearchFilter.Not(new SearchFilter.IsEqualTo(EmailMessageSchema.Categories, "Processed")),
new SearchFilter.IsGreaterThan(EmailMessageSchema.DateTimeReceived, minDate));
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