XPS OM Part Interfaces

This topic describes how to use the interfaces that provide access to XPS document parts in an XPS OM.

Code Examples

The code examples that follow show two examples of how to use the part interfaces to access XPS OM content.

Get the name of a document part

The following code example navigates to a document part and gets the part's name.

    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();

Get the part resources that are associated with this page

The following code example gets the lists of the different resources that are used by this page.

    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();