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Editorial Team
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Asked: 2026-05-22T16:29:55+00:00

I have made a form using Google Apps Script’s Ui Services and put it

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I have made a form using Google Apps Script’s Ui Services and put it as a gadget inside a Sites page. The form has a SubmitButton. In the doPost I save the form data to a Google spreadsheet.

How can I validate form data before it gets saved?

  • I couldn’t use doPost because it clears the UI.
  • I thought of using regular Button and handle validation and saving in a ServerClickHandler but I cannot get the all form data in e.parameter.

What is the right way to do this?

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1 Answer

  1. Editorial Team

    I did it using the second approach I mentioned above using the click handler of a button instead of a submit button on a form. The problem was that for a strange reason the handler throws an exception if the callback element (panel or a grid) has a multi-select Listbox. If the listbox is removed, the handler works as it should. I posted it as an issue to Google forum.

    I am still interested to see if this can be done in the doPost method using submit button and a form panel. I think it would be possible if we could prevent doPost from clearing out the UI somehow.

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