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Editorial Team
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Asked: 2026-05-15T13:59:26+00:00

I’m having a very hard time wrapping my head around this problem (it might

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I’m having a very hard time wrapping my head around this problem (it might be the heat from the summer finally arriving).

Problem:
I want the user to press a button client side which performs javascript data preparing and at last send a JSON structure to (currently a asmx webservice on) the server. The JSON structure is several levels deep.

Server side I create a PDF file which I want to send back to the user.

Goal:
The user feeling is that she presses a button and expects a PDF to return to her – either in a new window or as a download (preferrable).

Tools:
The system consists of (client side) HTML, JavaScript and ExtJS and (server side) ASP.NET.

Normally I would use an ashx handler to return a file to the client, but can I send a JSON structure to the handler and still be able to parse it correctly server side?

I am searching for the pattern to use.

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1 Answer

  1. Editorial Team

    On the client side: submit the JSON string as part of the form data.

    On the server side: parse the JSON string (the answers to this question list a number of JSON parsers usable in asp.net) and then generate the PDF. The header

    Content-disposition: attachment; filename=something.pdf;

    will make the PDF appear as a download for the user.

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