PackUriHelper.ResolvePartUri(Uri, Uri) Méthode

Définition

Espace de noms:

System.IO.Packaging

Assembly:

System.IO.Packaging.dll

Paquet:

System.IO.Packaging v8.0.0

Source:

PackUriHelper.cs

Retourne un URI de composant à partir d'un URI de composant source et d'un URI avec chemin d'accès relatif à un composant cible.

public:
 static Uri ^ ResolvePartUri(Uri ^ sourcePartUri, Uri ^ targetUri);

public static Uri ResolvePartUri (Uri sourcePartUri, Uri targetUri);

static member ResolvePartUri : Uri * Uri -> Uri

Public Shared Function ResolvePartUri (sourcePartUri As Uri, targetUri As Uri) As Uri

Paramètres

sourcePartUri

Uri

URI du composant source, ou « / » pour désigner la racine du Package.

targetUri

Uri

URI relatif vers le composant cible.

Retours

Uri

URI du composant cible résolu entre le SourcePartUri spécifié et les paramètres targetUri.

Exceptions

ArgumentNullException

sourcePartUri ou targetUri est null.

ArgumentException

sourcePartUri n'est pas un URI de composant valide.

- ou -

targetUri n'est pas un URI relatif valide.

Exemples

L'exemple suivant illustre l'utilisation de la méthode ResolvePartUri. Pour obtenir l’exemple complet, consultez Lecture d’un exemple de package.

// 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.

Remarques

Le tableau suivant illustre des exemples de cas pour ResolvePartUri.

sourcePartUri	targetUri	URI retourné
/mydoc/markup/page.xml	picture.jpg	/mydoc/markup/picture.jpg
/mydoc/markup/page.xml	images/picture.jpg	/mydoc/markup/images/picture.jpg
/mydoc/markup/page.xml	./picture.jpg	/mydoc/markup/picture.jpg
/mydoc/markup/page.xml	.. /picture.jpg	/mydoc/picture.jpg
/mydoc/markup/page.xml	.. /images/picture.jpg	/mydoc/images/picture.jpg
/	images/picture.jpg	/images/picture.jpg

Voir aussi

• GetPartUri(Uri)
• GetRelativeUri(Uri, Uri)
• Spécification d’Open Packaging Conventions