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Programatically Adding Digital signature (.jpg image) to existing PDF file using vb.net/asp.net

Posted on 2014-02-28
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Last Modified: 2014-03-07
I have the following requirement

    Lab equipment exports  the result of investigations into PDF file and is stored in shared drive. I need to read this from another vb.net/asp.net application and insert the digital signature (.jpg image) in to the page footer of the pdf file.

Request experts to give a solution for this at the earliest
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Question by:venkataramanaiahsr
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Expert Comment

by:Matti
ID: 39896820
Well there is a PDF dll and its code in #C available I'm not pointing it as I'm not sure do it violate some patent or not. Then there is Sharp #C to VB tool called Sharp Develop.

It's a long project to select what you need to port in to VB and is it possible to use the ready PDF dll freely available. Dependence do you redistribute it or not.

Then there is components but 2000$ for a tool, well might be good time saver or a disaster as you don't control it's version compatibility and such.

If you need this in VB own compiled code prepare 30days learning curve if you are expert.

Matti
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Author Comment

by:venkataramanaiahsr
ID: 39897045
It is required for in house application. It would greatly help me if you can provide the PDF dll and if possible sample application on how to use it or some documentation on the usage
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LVL 14

Expert Comment

by:Matti
ID: 39897056
Hi!

As I said I do not know VB code for this you must port it, it goes full automated a part by a part, select what you port with Sharp Develop, there is a lot of code and the file safety might be poor in these times so I don't held responsibility of it in these day's.

http://sourceforge.net/projects/pdfsharp/files/pdfsharp/PDFsharp%201.32/PDFSharp-MigraDocFoundation-1_32.zip/download?use_mirror=netcologne

I'm not sure how alternative pdf programs are today, but it's in risk of delete here.

It has VB code samples how to use it but if the dll needs to be VB and own compiled VB.NET code you need #C experience to select what to port.

Matti
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