Substituting commas for dots on text entry

[ratapof29]

Hello, i would like to make a field subsitute "," for "." on text entry, or on submission of the form.
The field is called DataCardValue11
I have tried adding this: Substitute(DataCardValue11.Text,",",".") to the "OnChange" and "OnSelect" of the field and it dosnt work...
I have also tried adding that to the "OnSave" of the SharepointIntegration object, and it dosnt work also.
Nothing ever happens and no errors 🙄

Thank you!

[DylanSimons]

You would need to change the first UpdateContext({}) to include a lookup of the data that should be in that field.

I would urge you to use @zmansuri 's solution. It is a much more efficient solution if you can get it working properly!