Package.GetRelationshipsByType(String) Método

Definición

Devuelve una colección de todas las relaciones de nivel de paquete que coincidan con una propiedad RelationshipType especificada.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

Parámetros

relationshipType
String

RelationshipType para coincidir y devolver en la colección.The RelationshipType to match and return in the collection.

Devoluciones

PackageRelationshipCollection

Colección de relaciones de nivel de paquete que coincidan con el relationshipType especificado.A collection of package-level relationships that match the specified relationshipType.

Excepciones

relationshipType es null.relationshipType is null.

relationshipType es una cadena vacía.relationshipType is an empty string.

El paquete no está abierto (se ha llamado a Dispose(Boolean) o Close()).The package is not open (Dispose(Boolean) or Close() has been called).

El paquete es de sólo escritura.The package is write-only.

Ejemplos

En el ejemplo siguiente se muestra cómo recuperar las relaciones que se han definido para el paquete.The following example shows how to retrieve the relationships that have been defined for the package. Para obtener el ejemplo completo, vea leer un ejemplo de paquete.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.

Comentarios

GetRelationships no devolverá nunca null ; sin embargo, la colección devuelta puede contener cero elementos si no hay relaciones de nivel de paquete que coincidan con el 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.

En la tabla siguiente se muestran los URI de nivel de paquete relationshipType definidos por la especificación de convenciones de empaquetado abierto (OPC).The following table shows the package-level relationshipType URIs defined by the Open Packaging Conventions (OPC) specification.

Relación de nivel de paquetePackage-level Relationship URI del tipo de relaciónRelationship Type URI
Propiedades básicasCore Properties http://schemas.openxmlformats.org/package/2006/relationships/metadata/core-properties
Firma digitalDigital Signature http://schemas.openxmlformats.org/package/2006/relationships/digital-signature/signature
Certificado de firma digitalDigital Signature Certificate http://schemas.openxmlformats.org/package/2006/relationships/digital-signature/certificate
Origen de la firma digitalDigital Signature Origin http://schemas.openxmlformats.org/package/2006/relationships/digital-signature/origin
ThumbnailThumbnail http://schemas.openxmlformats.org/package/2006/relationships/metadata/thumbnail

Para obtener más información, consulte la especificación de convenciones de empaquetado abierto (OPC) disponible para su descarga en 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.

Se aplica a

Consulte también