Costruttore ItemListFilterInfo (SyncIdFormatGroup)

Inizializza una nuova istanza della classe ItemListFilterInfo contenente lo schema del formato dell'ID specificato.

Spazio dei nomi: Microsoft.Synchronization
Assembly: Microsoft.Synchronization (in microsoft.synchronization.dll)

Sintassi

'Dichiarazione
Public Sub New ( _
    idFormats As SyncIdFormatGroup _
)
'Utilizzo
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
)

Parametri

• idFormats
  Schema del formato dell'ID del provider.

Esempio

Nell'esempio seguente viene creato un oggetto ItemListFilterInfo e viene utilizzato con un'implementazione di ReplicaMetadata.ItemFilterCallback per recuperare un batch di modifiche filtrate tramite GetFilteredChangeBatch. È inclusa anche l'implementazione di ReplicaMetadata.ItemFilterCallback.

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);
}

Vedere anche

Riferimento

Classe ItemListFilterInfo
Membri ItemListFilterInfo
Spazio dei nomi Microsoft.Synchronization