Number special formatting

[Fa1con74]

Hello, I want to format a text field in this way ###_###_### when the user is typing.
Is it possible ?

[bonameblisto · Accepted solution]

Look answer for that post
https://www.googlecloudcommunity.com/gc/AppSheet-Q-A/Text-or-Number-Box-with-Dots-in-between-to-ente...
Notice: any checks executed not imediatly user types data, but when edited field lost focus (switch to next field or button)

[WillowMobileSys]

Not when the user is typing.  AppSheet does not use input format strings.

AppSheet does allow you apply validation rules in the a property named "Valid_If" on each column.  You can apply expressions to verify the input is in the format you expect and if not present a message  composed in the "Invalid value error" property.

To accomplish the same thing, I would include in your field label text such as (e.g. ###_###_###) to give the user an example upfront of how you wish the values to be entered, then implement a "Valid_If" with "Invalid value error" expression to confirm the format and show a message if its wrong.