A common way of loading XpsDocument is to load it from file:
XpsDocument document = new XpsDocument(filename, FileAccess.Read, CompressionOption.NotCompressed);
FixedDocumentSequence fixedDocumentSequence = document.GetFixedDocumentSequence();
//To view in the DocViewer
docViewer.Document = fixedDocumentSequence as IDocumentPaginatorSource;
But if we need to Load the Xps from a Stream we can use the Package Class and do the following:
private void LoadXpsFromStream(Byte[] xpsByte, string packageUriString)
{
MemoryStream xpsStream = new MemoryStream(xpsByte);
using (Package package = Package.Open(xpsStream))
//Remember to create URI for the package
Uri packageUri = new Uri(packageUriString);
//Need to add the Package to the PackageStore
PackageStore.AddPackage(packageUri, package);
//Create instance of XpsDocument
XpsDocument document = new XpsDocument(package, CompressionOptions.MaximuCompression, packageUriString);
//Do the operation on document here
//Here I am viewing the document in the DocViewer
FixedDocumentSequence fixedDocumentSequence = document.GetFixedDocumentSequence();
//To view in the DocViewer
docViewer.Document = fixedDocumentSequence as IDocumentPaginatorSource;
//Remember to keep the Package object in PackageStore until all operations complete on document.
//Remove the package from store
PackageStore.RemovePackage(packageUri);
doc.Close();
}
//Calling the above function from Client
//
//Get bytes[] from MemoryStream
//byte[] xpsBytes = someStream.ToArray();
//For demonstration I am reading bytes from a file
byte[] xpsBytes = File.ReadAllBytes(@"somexps.xps");
//
LoadXpsFromStream( xpsBytes, "somexps.xps");
Hope this helps.