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Editorial Team
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Asked: 2026-05-13T14:50:02+00:00

I am doing some work on a legacy project, one that has been upgraded

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I am doing some work on a legacy project, one that has been upgraded through the years from 1.1, to 2.0, and is now set at 3.5. Currently I am having some issues with required field validators not running when I click submit.

It’s a pretty simple setup. I have two textboxes, I need both to be filled when a user clicks submit, I have RFV’s pointing to each textbox but when I click the submit button the validation is not fired and then the resulting code bombs out. I have tried using both ValidationGroup on the relevant controls and also changing Display from “Dynamic” to “Static”, with no results.

I’ve also had some issues when using AJAX controls where I get javascript errors and the like, which to me would point to an incorrect config regarding client-side libraries. Of course, I’m not really sure how to go about pinpointing the errors in my config. Any suggestions?

Thanks,

Mike

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1 Answer

  1. Editorial Team

    I found the solution while researching a similar problem on Telerik’s support forum. The trick is to remove the tag <xhtmlConformance mode="Legacy"/> from the web.config as this somehow prevents the proper JS libraries from being loaded into the page.

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