Guys, here's where I am stuck.
I have a need to create a single XPS file from a huge bunch of tiny XPS files. The problem is that I keep running out of memory when I try to do this.
I present below the code (taken from MSDN), but essentially all it does is this:
- It reads each tiny XPS file
- Extracts the pages from it.
- Adds these pages to a FixedDocumentSequence.
- When all docs are done, it writes this sequence out to the combined XPS doc.
IMO, my FixedDocumentSequence is getting too big. So, I am thinking, that maybe I can do this piece by piece - i.e. append the tiny XPS docs to the combined XPS docs one by one.
Now, I don't know how to do that. Any pointers?
Code:
//Create new xps package
Package combinedXPS = Package.Open(filename, FileMode.Create);
XpsDocumentWriter xpsWriter = XpsDocument.CreateXpsDocumentWriter(new XpsDocument(combinedXPS));
FixedDocumentSequence combinedSequence = new FixedDocumentSequence();
//Go through each file given
foreach (string file in filenames)
{
//Load Xps Package
XpsDocument singleXPS = new XpsDocument(file, FileAccess.Read);
FixedDocumentSequence singleSequence = singleXPS.GetFixedDocumentSequence();
//Go through each document in the file
foreach (DocumentReference docRef in singleSequence.References)
{
FixedDocument oldDoc = docRef.GetDocument(false);
FixedDocument newDoc = new FixedDocument();
DocumentReference newDocReference = new DocumentReference();
newDocReference.SetDocument(newDoc);
//Go through each page
foreach (PageContent page in oldDoc.Pages)
{
PageContent newPage = new PageContent();
newPage.Source = page.Source;
(newPage as IUriContext).BaseUri = ((IUriContext)page).BaseUri;
newPage.GetPageRoot(true);
newDoc.Pages.Add(newPage);
}
//Add the document to package
combinedSequence.References.Add(newDocReference);
}
singleXPS.Close();
}
xpsWriter.Write(combinedSequence);
combinedXPS.Close();
