Package.GetRelationshipsByType(String) Yöntem

Tanım

Ad Alanı:

System.IO.Packaging

Bütünleştirilmiş Kod:

System.IO.Packaging.dll

Paket:

System.IO.Packaging v9.0.0-preview.4.24266.19

Kaynak:

Package.cs

Belirli RelationshipTypebir ile eşleşen tüm paket düzeyi ilişkilerinin koleksiyonunu döndürür.

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

Parametreler

relationshipType

String

RelationshipType eşleştirmek ve koleksiyonda döndürmek için.

Döndürülenler

PackageRelationshipCollection

Belirtilen relationshipTypeile eşleşen paket düzeyi ilişkileri koleksiyonu.

Özel durumlar

ArgumentNullException

relationshipType, null değeridir.

ArgumentException

relationshipType boş bir dizedir.

ObjectDisposedException

Paket açık değil (Dispose(Boolean) veya Close() çağrıldı).

IOException

Paket yalnızca yazılır.

Örnekler

Aşağıdaki örnek, paket için tanımlanmış ilişkilerin nasıl alındığını gösterir.

// 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.

Açıklamalar

GetRelationships hiçbir zaman döndürmez null; ancak belirtilen relationshipTypeile eşleşen paket düzeyi ilişkileri yoksa döndürülen koleksiyon sıfır öğe içerebilir.

Aşağıdaki tabloda Open Packaging Conventions (OPC) belirtimi tarafından tanımlanan paket düzeyi relationshipType URI'ler gösterilmektedir.

Paket Düzeyinde İlişki	İlişki Türü URI'si
Temel Özellikler	http://schemas.openxmlformats.org/package/2006/relationships/metadata/core-properties
Dijital İmza	http://schemas.openxmlformats.org/package/2006/relationships/digital-signature/signature
Dijital İmza Sertifikası	http://schemas.openxmlformats.org/package/2006/relationships/digital-signature/certificate
Dijital İmza Kaynağı	http://schemas.openxmlformats.org/package/2006/relationships/digital-signature/origin
Küçük	http://schemas.openxmlformats.org/package/2006/relationships/metadata/thumbnail

Ek bilgi için adresinden indirilebilen https://www.ecma-international.org/publications-and-standards/standards/ecma-376/Open Packaging Conventions (OPC) belirtimine bakın.

Ayrıca bkz.

• GetRelationship(String)
• GetRelationships()
• CreateRelationship(Uri, TargetMode, String)
• DeleteRelationship(String)