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Asked: 2026-05-12T00:26:10+00:00

Currently I am using the terrific Linq 2 Json.net (by newtonsoft), which is a

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Currently I am using the terrific Linq 2 Json.net (by newtonsoft), which is a very great simple tool to generate JSON result in programatic way.

But after finishing some projects, I stopped and rethink, should I generate the JSON result in the controller? I mean, in .net MVC framework, it DOES provided a JSONResult as one of the ViewResult. But should the controller bother how the result is generated? Or should it just “Provide” the data to view, and it should be the view’s job to generate the necessary output (and formatting)?

One last thing, I also heard that using “ViewData” in controller might not be a good idea as controller is concerning too much on display/output issue, any better pattern or method could be use?

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  1. Editorial Team

    I think I will justify the JSON output in Controller as JSON is just a form of ViewData, just similar thing as using ViewData Dictionary to communicate with the View pages.

    And the actual View page is already rendered, or handled by the client side languages. Although one downside is, the JSON-output Controller is quite dependent to the view, yes, you can still change the view to some other thing which accepts that JSON as channel of communication, but not a good idea if you want to change the client to, for example, a desktop application using other channels as communication (like, direct TCP connection nor SOAP application etc.) coz the controller is made for JSON. (true you can make an adapter to do translation).

    So to wrap it up, JSON rendering in controller is OK as long as you are not planning to other platform while presisting the controller unchanged.

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