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Package.GetRelationshipsByType(String) Metode

  • Referensi

Definisi

Ruang nama:
System.IO.Packaging
Rakitan:
System.IO.Packaging.dll
Rakitan:
WindowsBase.dll
Paket:
System.IO.Packaging v8.0.0
Paket:
System.IO.Packaging v9.0.0-preview.3.24172.9
Sumber:
Package.cs
Sumber:
Package.cs
Sumber:
Package.cs
Sumber:
Package.cs

Mengembalikan kumpulan semua hubungan tingkat paket yang cocok dengan yang diberikan 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

Parameter

relationshipType
String

untuk RelationshipType mencocokkan dan kembali dalam koleksi.

Mengembalikan

PackageRelationshipCollection

Kumpulan hubungan tingkat paket yang cocok dengan yang ditentukan relationshipType.

Pengecualian

ArgumentNullException

relationshipTypeadalah null.

ArgumentException

relationshipType adalah string kosong.

ObjectDisposedException

Paket tidak terbuka (Dispose(Boolean) atau Close() telah dipanggil).

IOException

Paket ini hanya untuk menulis.

Contoh

Contoh berikut menunjukkan cara mengambil hubungan yang telah ditentukan untuk paket.

// 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.

Keterangan

GetRelationships tidak akan pernah kembali null; namun koleksi yang dikembalikan mungkin berisi elemen nol jika tidak ada hubungan tingkat paket yang cocok dengan yang ditentukan relationshipType.

Tabel berikut menunjukkan URI tingkat relationshipType paket yang ditentukan oleh spesifikasi Open Packaging Conventions (OPC).

Hubungan tingkat paket Jenis Hubungan URI
Properti Inti http://schemas.openxmlformats.org/package/2006/relationships/metadata/core-properties
Tanda Tangan Digital http://schemas.openxmlformats.org/package/2006/relationships/digital-signature/signature
Sertifikat Tanda Tangan Digital http://schemas.openxmlformats.org/package/2006/relationships/digital-signature/certificate
Asal Tanda Tangan Digital http://schemas.openxmlformats.org/package/2006/relationships/digital-signature/origin
Gambar mini http://schemas.openxmlformats.org/package/2006/relationships/metadata/thumbnail

Untuk informasi tambahan, lihat spesifikasi Open Packaging Conventions (OPC) yang tersedia untuk diunduh di https://www.ecma-international.org/publications-and-standards/standards/ecma-376/.

Berlaku untuk

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