Конструктор ItemListFilterInfo (SyncIdFormatGroup)

Инициализирует новый экземпляр класса ItemListFilterInfo, содержащий указанную схему форматов идентификаторов.

Пространство имен: Microsoft.Synchronization
Сборка: Microsoft.Synchronization (в microsoft.synchronization.dll)

Синтаксис

'Декларация
Public Sub New ( _
    idFormats As SyncIdFormatGroup _
)
'Применение
Dim idFormats As SyncIdFormatGroup

Dim instance As New ItemListFilterInfo(idFormats)

public ItemListFilterInfo (
    SyncIdFormatGroup idFormats
)

public:
ItemListFilterInfo (
    SyncIdFormatGroup^ idFormats
)

public ItemListFilterInfo (
    SyncIdFormatGroup idFormats
)

public function ItemListFilterInfo (
    idFormats : SyncIdFormatGroup
)

Параметры

• idFormats
  Схема форматов идентификаторов для поставщика.

Пример

В следующем примере показано создание и использование объекта ItemListFilterInfo, а также реализация ReplicaMetadata.ItemFilterCallback для получения пакета фильтрованных изменений вызовом метода GetFilteredChangeBatch. Реализация метода ReplicaMetadata.ItemFilterCallback также включена.

Public Overrides Function GetChangeBatch(ByVal batchSize As UInteger, ByVal destinationKnowledge As SyncKnowledge, ByRef changeDataRetriever As Object) As ChangeBatch
    ' Return this object as the IChangeDataRetriever object that is called to retrieve item data.
    changeDataRetriever = Me

    ' Use the metadata storage service to get a batch of changes.
    Dim retrievedBatch As ChangeBatch
    If _isFiltered Then
        ' If a filter is set, get a filtered change batch from the metadata storage service.
        ' The BirthdateFilterCallback method indicates whether an item passes the filter.
        Dim filterInfo As New ItemListFilterInfo(IdFormats)
        retrievedBatch = _ContactStore.ContactReplicaMetadata.GetFilteredChangeBatch(batchSize, destinationKnowledge, filterInfo, AddressOf BirthdateFilterCallback)
    Else
        retrievedBatch = _ContactStore.ContactReplicaMetadata.GetChangeBatch(batchSize, destinationKnowledge)
    End If

    Return retrievedBatch
End Function
Public Function BirthdateFilterCallback(ByVal itemMeta As ItemMetadata) As Boolean
    ' An item passes the filter only if its birthdate field is less than the maximum birthdate
    ' specified by the filter.
    Return (_ContactStore.ContactList(itemMeta.GlobalId).Birthdate < _maxBirthdateFilter)
End Function

public override ChangeBatch GetChangeBatch(uint batchSize, SyncKnowledge destinationKnowledge, out object changeDataRetriever)
{
    // Return this object as the IChangeDataRetriever object that is called to retrieve item data.
    changeDataRetriever = this;

    // Use the metadata storage service to get a batch of changes.
    ChangeBatch retrievedBatch;
    if (_isFiltered)
    {
        // If a filter is set, get a filtered change batch from the metadata storage service.
        // The BirthdateFilterCallback method indicates whether an item passes the filter.
        ItemListFilterInfo filterInfo = new ItemListFilterInfo(IdFormats);
        retrievedBatch = _ContactStore.ContactReplicaMetadata.GetFilteredChangeBatch(batchSize, destinationKnowledge,
            filterInfo, BirthdateFilterCallback);
    }
    else
    {
        retrievedBatch = _ContactStore.ContactReplicaMetadata.GetChangeBatch(batchSize, destinationKnowledge);
    }

    return retrievedBatch;
}

public bool BirthdateFilterCallback(ItemMetadata itemMeta)
{
    // An item passes the filter only if its birthdate field is less than the maximum birthdate
    // specified by the filter.
    return (_ContactStore.ContactList[itemMeta.GlobalId].Birthdate < _maxBirthdateFilter);
}

См. также

Справочник

Класс ItemListFilterInfo
Элементы ItemListFilterInfo
Пространство имен Microsoft.Synchronization