Interfaces de parte do OM do XPS

Este tópico descreve como usar as interfaces que fornecem acesso a partes de documento XPS em um OM XPS.

Exemplos de código

Os exemplos de código a seguir mostram dois exemplos de como usar as interfaces de parte para acessar o conteúdo do OM do XPS.

Obter o nome de uma parte do documento

O exemplo de código a seguir navega até uma parte do documento e obtém o nome da parte.

    HRESULT                         hr = S_OK;
    
    IXpsOMDocumentSequence          *docSeq;
    IXpsOMDocumentCollection        *docs;
    IXpsOMDocument                  *doc;
    IXpsOMPageReferenceCollection   *pages;
    IXpsOMPageReference             *pageRef;
    IXpsOMPage                      *page;

    IOpcPartUri                     *thisDocPartUri;
    IOpcPartUri                     *thisPagePartUri;

    UINT32  numDocs = 0;
    UINT32  thisDoc = 0;

    UINT32  numPageRefs = 0;
    UINT32  thisPageRef = 0;

    // package points to the IXpsOMPackage interface to walk.

    // get the fixed document sequence of the package
    hr = package->GetDocumentSequence(&docSeq);

    // get the fixed documents in the fixed document sequence
    hr = docSeq->GetDocuments(&docs);

    // walk the collection of documents;
    hr = docs->GetCount(&numDocs);
    thisDoc = 0;
    while (thisDoc < numDocs) {
        hr = docs->GetAt(thisDoc, &doc);
        
        // get the part name (URI) of this document
        hr = doc->GetPartName ( &thisDocPartUri );

        // get the doc contents
        hr = doc->GetPageReferences(&pages);
        
        // walk the collection of page references
        hr = pages->GetCount(&numPageRefs);
        thisPageRef = 0;
        while (thisPageRef < numPageRefs) {
            // get this page reference
            hr = pages->GetAt(thisPageRef, &pageRef );

            // get the part name (URI) of this page
            hr = pageRef->GetPage (&page);
            hr = page->GetPartName ( &thisPagePartUri );

            // do something with the part name
 
            thisPagePartUri->Release();
            page->Release();
            pageRef->Release();

            thisPageRef++;
        }
        pages->Release();
        thisDocPartUri->Release();
        doc->Release();
        thisDoc++;
    }

    docs->Release();
    docSeq->Release();

Obter os recursos de parte associados a esta página

O exemplo de código a seguir obtém as listas dos diferentes recursos que são usados por esta página.

    HRESULT                                   hr = S_OK;
    IXpsOMPartResources                       *resources;

    IXpsOMColorProfileResourceCollection      *colorProfileResources;
    IXpsOMFontResourceCollection              *fontResources;
    IXpsOMImageResourceCollection             *imageResources;
    IXpsOMRemoteDictionaryResourceCollection  *dictionaryResources; 

    // pageRef contains the current page reference 
    hr = pageRef->CollectPartResources ( &resources );

    // Get pointers to each type of resource
    hr = resources->GetColorProfileResources( &colorProfileResources );
    hr = resources->GetFontResources( &fontResources );
    hr = resources->GetImageResources( &imageResources );
    hr = resources->GetRemoteDictionaryResources( &dictionaryResources );

    // use resources

    dictionaryResources->Release();
    imageResources->Release();
    fontResources->Release();
    colorProfileResources->Release();
    resources->Release();