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Workbook.Open fails after reading in a stream


We’re setting up a project in Silverlight. We browse an excel file, read it into a bytearray and send it with wcf to the server. There it exists as a Stream-Object (Type from System.IO). The method Workbook.Open accepts a Stream object as parameter, but when this is called, it throws a {“Specified method is not supported.”}.

We use Aspose.Cells for .NET, dll version is

Any suggestions for this?

Kind regards


Please test this issue with the latest version:
for .NET v6.0.1.9

If the problem persists, then please create a sample application project replicating the problem and attach here.


I’ve tried with the dll version you supplied in your answer, but i got the same error as before. I’ve put the basic in a separate project and reproduced the error. I attached it to this reply.

Kind regards.