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How to Disply a PDF ByteArray in Flex

Posted on 2010-09-16
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Last Modified: 2012-06-22
I have a .NET web service that I am calling from a Flex application.  The web service returns a PDF as a ByteArray that I would like to display in a new browser window.  I believe I need to use a combination of the URLRequest and URLStream classes to accomplish this task.  Is there a good example on how to do this?
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Question by:MicheleDunham
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5 Comments
 
LVL 20

Expert Comment

by:ChristoferDutz
ID: 33700792
The problem is that Flex is not able to display PDFs. Even if both are Adobe Products, you cannot display a PDF in Flex. The best solution would be to have an aspx page serialize the ByteArray with a MIME Type for PDF and have that content displayed in an IFrame.
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Author Comment

by:MicheleDunham
ID: 33703185

I'm not sure how to hook in the aspx page with the web service?  This is the code the web service executes to generate the ByteArray.  Since the export bytearray is already in a PDF format would it be possible then to use the AlivePDF library to save or display the document?

 // Export the Report to a PDF Byte Array
           
            MemoryStream oStream;
            oStream = (MemoryStream)drillDownCrystalReport.ExportToStream
                (CrystalDecisions.Shared.ExportFormatType.PortableDocFormat);
            Byte[] reportPDFByteArray = oStream.ToArray();

            //  Return the PDF Byte Array to the Calling Program

            return reportPDFByteArray;
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LVL 20

Expert Comment

by:ChristoferDutz
ID: 33705497
Well unfortunately I am a Java Guy and not very familiar with the details of aspx pages. In the Java world we have a Response object and you can get a reference to it's output stream which sends everything you write in that stream to the client.
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Accepted Solution

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MicheleDunham earned 0 total points
ID: 33705550
Yes, that works the same in a .NET aspx page.  However I don't know how to accomplish what you suggest in a web service..  I can use the FileReference class in Flex to allow the user to save the ByteArray as a pdf to disk, but there isn't a way to allow the user to view the pdf in the application or bring up a browser window with the pdf.  In order to do this the client has to download a URL from the server.  At least that is what I think has to happen.  Thanks for your input.
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LVL 20

Expert Comment

by:ChristoferDutz
ID: 33707840
Sending this to the client via WebService will not work. Not if you want to display the PDF in the client. If you want to do this you have to send back the PDF the old-fashioned way using a simple aspx-page (in your case).
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