Hi David,
It is not possible to limit the input of RadNumericUpDown at the time it is being input. You can use the Minimum and Maximum properties to limit the RadNumericUpDown value when the user has finished editing. And you can wire up some DataValidation logic as shown in
this online example.
To accomplish the input length validation, I would suggest that you try using the
RadMaskedInputTextBox, instead.
I hope this helps.
Regards,
Dani
the Telerik team
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