PDF Opens In Acrobat X But Not Programatically?

Jun 18, 2012

I've written an interface with a 3rd party web service in VB.NET. The final step in that interface involves the 3rd party delivering to us (as a stream) a PDF document. After streaming is complete I save a copy of the PDF on our servers, so that our users can view the PDF by clicking on a link in our system. The PDF opens fine in Acrobat X, but when I try to open it programatically I an error saying that "the file is damaged and could not be repaired". I can also open the file in IE just fine, with no issues, and the same code that displays this PDF works just fine on lots of other existing PDFs that predate the 3rd party interface.

I have emptied out temporary internet files as suggested in some posts I saw online. I also opened the PDF in Notepad++ and the %PDF tag is first, and the %%EOF tag is last, so there's certainly no corruption visible in the document source that I can see. Below is the (very standard) code we use to open PDFs into a separate browser instance on our site:

PDFFile = System.AppDomain.CurrentDomain.BaseDirectory & Request.QueryString("LetterPath") & Request.QueryString("Letter")
Response.Clear()
Response.ClearHeaders()
Response.BufferOutput = True

[code].....

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I'm having a problem with closing Acrobat. I'm using vb.net to sign a PDF file in running Acrobat. After I'm done I close Acrobat and try to delete the currently signed PDF file, but I get an error message telling me that file is being used by another process. I tried closing and setting to Nothing AcroApp, AcroAVDoc, AcroPDDoc JSO, but still that doesn't work. I tried releasing them with Marshal.ReleaseComObject(...) still no effect.[code]

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I'm writing an app that prints of batches of documents to clients for posting. The printer uses OMR to collate and fold the documents into envelopes automatically.The document inputs will either be Word or Adobe Acrobat. I have routines to print off each document type while adding OMR on the fly.

The issue I have is that when the routine for PDF is run, the Adobe file is not closing properly. So when the next clients batch is being printed, there is an error saying that the document is locked by another user or process.I'm using the Acrobat 7 reference library and have Acrobat 7 installed on my machine (full blown product, not reader,) I'm closing the PDDocument, the AVDocument and the application in the code and I've even wrote a routine to kill the process to no avail.

[Code]...

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Aug 5, 2011

[code]...

IF I open up IE, which I assume the WebBrowser control is based on, I can type the path of the PDF in the address bar, and it views it in the browser, just as it should.

When I do "navigate" to a PDF file, I do notice a short popup (and progress bar) before viewing the PDF in acrobat. It happens so quickly that I can't read it, but it looks like a download progress bar.

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Public Shared Sub StreamPdfToBrowser(ByVal doc As Document)
Dim Ctx As HttpContext = HttpContext.Current
'// Clear any part of this page that might have already been buffered for output.

[code]....

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Below is a snippet of the code that I am try to using:
Try
'Tries To Close Acrobat Application
acrobatApp.Exit()
System.Runtime.InteropServices.Marshal.ReleaseComObject(javaScriptObj)
[Code] .....

Although I am not sure if this could be a problem - I run a javascript saveAs script on the Acrobat side in order to make a copy of the file. This also could be a reason why it is hanging, but I ruled it out based on basic knowledge of saving files and exiting from other Acrobat/Microsoft Programs. Acrobat only closes when my application ends. (Currently) I am trying to make it consider the case if a user manually closes the Acrobat application.

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PdfStream.WriteTo(PdfFile)
PdfStream.Flush()

[Code]...

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