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Asked: 2026-05-22T16:16:30+00:00

I am scraping a certain ASP.NET-enabled search page from a Python script and running

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I am scraping a certain ASP.NET-enabled search page from a Python script and running into trouble getting the data I want from postbacks.

So I want to verify if I’ve got ASP.NET related bits correctly before ruling it out.

So far I just take all hidden form variables (e.g. __VIEWSTATE) and send them with other POST request parameters. Is this correct or they should change in some way? POST response contains updated hidden variables, which I assume should become parameters of the next postback, however when I browse the same page in Firefox, not all hidden form fields posted back are the same (e.g. __EVENTTARGET and __EVENTARGUMENT).

Do I need any other special handling here or this is all there is to it?

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1 Answer

  1. Editorial Team

    That’s pretty much all there is to it. The main thing is maintaining __VIEWSTATE from one post to another; which it sounds like you’ve covered.

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