How do I check if a Text Input field contains letters?

Hi guys,

I did a search but I couldn't figure out how to do this.

I need to be able to enter only numerical values into a text input field (phone number)

So whenever an invalid character its added (letters or symbols) I need the system to throw a warning.

Thanks in advance for any ideas.

you can add an event to check the type

under System - Check Value Type

for value enter your TextInput.Text field, and type Number or String (depending on whether you want to display an error or continue on with what was entered).

Thanks!

You can also change your TextBox type to Number. It will only accept numbers.

dop2000 For some reason, that didn't work.

Finally I opted for:

RegexReplace(TextInput.Text, "\D", "", "")

But when I try to format the phone number as xxx-xxxx, the symbol "-" is deleted since On Text changed I'm using RegexReplace.