Loads a document from existing data stored in a stream.
Public Shared Function LoadFromStream(
ByVal stream As System.IO.Stream,
ByVal options As LoadDocumentOptions
) As Document
Stream containing the original document data. This value cannot be null and the stream must be seekable.
Options to use when loading the document. This value cannot be null.
The newly created document object.
LoadFromFile, LoadFromUri, LoadFromUriAsync and LoadFromStream creates a Document class from any supported image or document file format stored in a disk file, remote URL or a stream. The returned object can then be used to retrieve any page as image or SVG, to obtain the text using SVG or OCR, use the annotations or the document structure such as links and bookmarks.
The Document class will use the stream members to read the various parts such as the images and metadata on demand as needed. It is the user responsibility to keep the stream alive while the document is not disposed. When the document is disposed, the stream is no longer used and can be closed or disposed by the user.
If the document is saved into the cache using SaveToCache, then the entire content of the stream is saved into the cache and the stream is no longer used and can be safely disposed by the user. When the document is later re-loaded from the cache using LoadFromCache, then it is treated as it was downloaded from an external resource and the stream functionality is not used (the value of Stream will be null).
After the document is obtained, InternalObject will be to the internal LEADTOOLS object used with the document.
Refer to Loading Using LEADTOOLS Documents Library for detailed information on how to use this method and the various options used.
public static void DocumentFactoryLoadFromStreamExample()
// Get a stream to anything, in this case a file
// Note that the stream must be seekable
var fileName = Path.Combine(ImagesPath.Path, "Leadtools.pdf");
using (var stream = File.OpenRead(fileName))
// We must keep the stream alive as long as the document is alive
var options = new LoadDocumentOptions();
using (var document = DocumentFactory.LoadFromStream(stream, options))
Public Shared Sub DocumentFactoryLoadFromStreamExample()
' Get a stream to anything, in this case a file
' Note that the stream must be seekable
Dim fileName As String = Path.Combine(ImagesPath.Path, "Leadtools.pdf")
Using stream As Stream = File.OpenRead(fileName)
' We must keep the stream alive as long as the document is alive
Dim options As New LoadDocumentOptions()
Using document As Document = DocumentFactory.LoadFromStream(stream, options)