[Solved] Need help!

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Paul
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Paul asked on 05 Oct 2026, 11:23 AM

Hi everyone!

I’m working on a form where I need to place a NumericTextBox inside a FormItem. The reason is that I need to reuse some validation rules that are defined in a separate file, as well as invoke a method that calculates and returns a value.

The problem is that as soon as I try to configure the NumericTextBox this way, the application fails to start or throws an error during runtime.

Has anyone encountered a similar issue when using a NumericTextBox inside a FormItem? I’d appreciate any suggestions on the correct way to structure this or how I can troubleshoot the problem.  One small mistake can send the ball off the edge, making every second of a run count. keeps the action intense with unpredictable paths and increasing speed.

Thanks in advance for any help!

slope

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Rumen
Telerik team
answered on 05 Oct 2026, 12:08 PM

Hi Paul,

Could you please clarify which product or component you are referring to? Also, could you provide the exact error message or describe precisely what happens when the application fails to start or throws the runtime error? You can also attach a screenshot.

The current description does not include enough details to identify the cause. If possible, please also share a small code example showing how you configure the NumericTextBox inside the FormItem.

Thank you!

Regards,
Rumen
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Rumen
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