Package.GetRelationshipsByType(String) Método

Definição

Retorna uma coleção de todas as relações de nível de pacote que correspondem a um determinado RelationshipType.Returns a collection of all the package-level relationships that match a given RelationshipType.

public:
 System::IO::Packaging::PackageRelationshipCollection ^ GetRelationshipsByType(System::String ^ relationshipType);
public System.IO.Packaging.PackageRelationshipCollection GetRelationshipsByType (string relationshipType);
member this.GetRelationshipsByType : string -> System.IO.Packaging.PackageRelationshipCollection
Public Function GetRelationshipsByType (relationshipType As String) As PackageRelationshipCollection

Parâmetros

relationshipType
String

O RelationshipType para corresponder e retornar na coleção.The RelationshipType to match and return in the collection.

Retornos

PackageRelationshipCollection

Uma coleção de relações de nível de pacote que correspondem ao relationshipType especificado.A collection of package-level relationships that match the specified relationshipType.

Exceções

relationshipType é null.relationshipType is null.

relationshipType é uma cadeia de caracteres vazia.relationshipType is an empty string.

O pacote não está aberto (Dispose(Boolean) ou Close() foi chamado).The package is not open (Dispose(Boolean) or Close() has been called).

O pacote é somente gravação.The package is write-only.

Exemplos

O exemplo a seguir mostra como recuperar as relações que foram definidas para o pacote.The following example shows how to retrieve the relationships that have been defined for the package. Para obter o exemplo completo, consulte lendo um exemplo de pacote.For the complete sample, see Reading a Package Sample.

// Open the Package.
// ('using' statement insures that 'package' is
//  closed and disposed when it goes out of scope.)
using (Package package =
    Package.Open(packagePath, FileMode.Open, FileAccess.Read))
{
    PackagePart documentPart = null;
    PackagePart resourcePart = null;

    // Get the Package Relationships and look for
    //   the Document part based on the RelationshipType
    Uri uriDocumentTarget = null;
    foreach (PackageRelationship relationship in
        package.GetRelationshipsByType(PackageRelationshipType))
    {
        // Resolve the Relationship Target Uri
        //   so the Document Part can be retrieved.
        uriDocumentTarget = PackUriHelper.ResolvePartUri(
            new Uri("/", UriKind.Relative), relationship.TargetUri);

        // Open the Document Part, write the contents to a file.
        documentPart = package.GetPart(uriDocumentTarget);
        ExtractPart(documentPart, targetDirectory);
    }

    // Get the Document part's Relationships,
    //   and look for required resources.
    Uri uriResourceTarget = null;
    foreach (PackageRelationship relationship in
        documentPart.GetRelationshipsByType(
                                ResourceRelationshipType))
    {
        // Resolve the Relationship Target Uri
        //   so the Resource Part can be retrieved.
        uriResourceTarget = PackUriHelper.ResolvePartUri(
            documentPart.Uri, relationship.TargetUri);

        // Open the Resource Part and write the contents to a file.
        resourcePart = package.GetPart(uriResourceTarget);
        ExtractPart(resourcePart, targetDirectory);
    }
}// end:using(Package package) - Close & dispose package.
' Open the Package.
' ('using' statement insures that 'package' is
'  closed and disposed when it goes out of scope.)
Using package As Package = Package.Open(packagePath, FileMode.Open, FileAccess.Read)
    Dim documentPart As PackagePart = Nothing
    Dim resourcePart As PackagePart = Nothing

    ' Get the Package Relationships and look for
    '   the Document part based on the RelationshipType
    Dim uriDocumentTarget As Uri = Nothing
    For Each relationship As PackageRelationship In package.GetRelationshipsByType(PackageRelationshipType)
        ' Resolve the Relationship Target Uri
        '   so the Document Part can be retrieved.
        uriDocumentTarget = PackUriHelper.ResolvePartUri(New Uri("/", UriKind.Relative), relationship.TargetUri)

        ' Open the Document Part, write the contents to a file.
        documentPart = package.GetPart(uriDocumentTarget)
        ExtractPart(documentPart, targetDirectory)
    Next relationship

    ' Get the Document part's Relationships,
    '   and look for required resources.
    Dim uriResourceTarget As Uri = Nothing
    For Each relationship As PackageRelationship In documentPart.GetRelationshipsByType(ResourceRelationshipType)
        ' Resolve the Relationship Target Uri
        '   so the Resource Part can be retrieved.
        uriResourceTarget = PackUriHelper.ResolvePartUri(documentPart.Uri, relationship.TargetUri)

        ' Open the Resource Part and write the contents to a file.
        resourcePart = package.GetPart(uriResourceTarget)
        ExtractPart(resourcePart, targetDirectory)
    Next relationship

End Using ' end:using(Package package) - Close & dispose package.

Comentários

GetRelationships nunca retornará null ; no entanto, a coleção retornada poderá conter zero elementos se não houver nenhuma relação de nível de pacote que corresponda ao especificado relationshipType .GetRelationships will never return null; however the returned collection may contain zero elements if there are no package-level relationships that match the specified relationshipType.

A tabela a seguir mostra os URIs de nível de pacote relationshipType definidos pela especificação OPC (Open Packaging Conventions).The following table shows the package-level relationshipType URIs defined by the Open Packaging Conventions (OPC) specification.

Relação de nível de pacotePackage-level Relationship URI do tipo de relaçãoRelationship Type URI
Propriedades de núcleoCore Properties http://schemas.openxmlformats.org/package/2006/relationships/metadata/core-properties
Assinatura digitalDigital Signature http://schemas.openxmlformats.org/package/2006/relationships/digital-signature/signature
Certificado de assinatura digitalDigital Signature Certificate http://schemas.openxmlformats.org/package/2006/relationships/digital-signature/certificate
Origem da assinatura digitalDigital Signature Origin http://schemas.openxmlformats.org/package/2006/relationships/digital-signature/origin
ThumbnailThumbnail http://schemas.openxmlformats.org/package/2006/relationships/metadata/thumbnail

Para obter informações adicionais, consulte Especificação do OPC (Open Packaging Conventions) disponível para download em https://go.microsoft.com/fwlink/?LinkID=71255 .For additional information, see the Open Packaging Conventions (OPC) specification available for download at https://go.microsoft.com/fwlink/?LinkID=71255.

Aplica-se a

Confira também