我正在尝试从收件箱文件夹中搜索两个日期之间的邮件项目。我使用以下限制类型，但它会引发此错误：
Firmt.RootFolder = null
我究竟做错了什么？
在提及的日期之间有一些消息;-)
感谢您的建议。
using (ExchangeServiceBinding esb = new ExchangeServiceBinding())
{
esb.Url = ConfigurationManager.AppSettings["ExchangeWebServicesURL"].ToString();
esb.RequestServerVersionValue = new RequestServerVersion();
esb.RequestServerVersionValue.Version = ExchangeVersionType.Exchange2007_SP1;
esb.PreAuthenticate = true;
esb.Credentials = new NetworkCredential(email, password);
FindItemType findItemRequest = new FindItemType();
// paging
IndexedPageViewType ipvt = new IndexedPageViewType();
ipvt.BasePoint = IndexBasePointType.Beginning;
ipvt.MaxEntriesReturned = nombreMessage;
ipvt.MaxEntriesReturnedSpecified = true;
ipvt.Offset = offset;
findItemRequest.Item = ipvt;
// filter by dates
AndType andType = new AndType();
List<SearchExpressionType> searchExps = new List<SearchExpressionType>();
RestrictionType restriction = new RestrictionType();
PathToUnindexedFieldType pteft = new PathToUnindexedFieldType
{
FieldURI = UnindexedFieldURIType.itemDateTimeSent
};
IsGreaterThanOrEqualToType IsGreaterThanOrEqualTo = new IsGreaterThanOrEqualToType
{
Item = pteft,
FieldURIOrConstant = new FieldURIOrConstantType
{
Item = new ConstantValueType
{
Value = DateTime.Today.AddDays(-6d).ToString()
}
}
};
searchExps.Add(IsGreaterThanOrEqualTo);
IsLessThanOrEqualToType IsLessThanOrEqualTo = new IsLessThanOrEqualToType
{
Item = pteft,
FieldURIOrConstant = new FieldURIOrConstantType
{
Item = new ConstantValueType
{
Value = DateTime.Today.AddDays(1d).ToString()
}
}
};
searchExps.Add(IsLessThanOrEqualTo);
andType.Items = searchExps.ToArray();
restriction.Item = andType;
findItemRequest.Restriction = restriction;
//// Define the sort order of items.
FieldOrderType[] fieldsOrder = new FieldOrderType[1];
fieldsOrder[0] = new FieldOrderType();
PathToUnindexedFieldType dateOrder = new PathToUnindexedFieldType
{
FieldURI = UnindexedFieldURIType.itemDateTimeReceived
};
fieldsOrder[0].Item = dateOrder;
fieldsOrder[0].Order = SortDirectionType.Descending;
findItemRequest.SortOrder = fieldsOrder;
findItemRequest.Traversal = ItemQueryTraversalType.Shallow;
// define which item properties are returned in the response
findItemRequest.ItemShape = new ItemResponseShapeType
{
BaseShape = DefaultShapeNamesType.IdOnly
};
// identify which folder to search
DistinguishedFolderIdType[] folderIDArray = new DistinguishedFolderIdType[1];
folderIDArray[0] = new DistinguishedFolderIdType { Id = DistinguishedFolderIdNameType.inbox };
// add folders to request
findItemRequest.ParentFolderIds = folderIDArray;
// find the messages
FindItemResponseType findItemResponse = esb.FindItem(findItemRequest);
//-------------
ArrayOfResponseMessagesType responseMessages = findItemResponse.ResponseMessages;
ResponseMessageType responseMessage = responseMessages.Items[0];
if (responseMessage is FindItemResponseMessageType)
{
FindItemResponseMessageType firmt = (responseMessage as FindItemResponseMessageType);
*******FindItemParentType fipt = firmt.RootFolder;********
object obj = fipt.Item;
// FindItem contains an array of items.
ArrayOfRealItemsType realitems = (obj as ArrayOfRealItemsType);
ItemType[] items = realitems.Items;
// if no messages were found, then return null -- we're done
if (items == null || items.Count() <= 0)
return null;
// FindItem never gets "all" the properties, so now that we've found them all, we need to get them all.
BaseItemIdType[] itemIds = new BaseItemIdType[items.Count()];
for (int i = 0; i < items.Count(); i++)
itemIds[i] = items[i].ItemId;
GetItemType getItemType = new GetItemType
{
ItemIds = itemIds,
ItemShape = new ItemResponseShapeType
{
BaseShape = DefaultShapeNamesType.AllProperties,
BodyType = BodyTypeResponseType.Text,
BodyTypeSpecified = true,
AdditionalProperties = new BasePathToElementType[] {
new PathToUnindexedFieldType { FieldURI = UnindexedFieldURIType.itemDateTimeSent },
new PathToUnindexedFieldType { FieldURI = UnindexedFieldURIType.messageFrom },
new PathToUnindexedFieldType { FieldURI = UnindexedFieldURIType.messageIsRead },
new PathToUnindexedFieldType { FieldURI = UnindexedFieldURIType.messageSender },
new PathToUnindexedFieldType { FieldURI = UnindexedFieldURIType.messageToRecipients },
new PathToUnindexedFieldType { FieldURI = UnindexedFieldURIType.messageCcRecipients },
new PathToUnindexedFieldType { FieldURI = UnindexedFieldURIType.messageBccRecipients }
}
}
};
GetItemResponseType getItemResponse = esb.GetItem(getItemType);
messages = ReadItems(getItemResponse, items.Count());
}