@taubry Montant HT_DataCard1
Check the Update property of this.
This is what is written back.
There may be some problem with it - you may need to change it for it to work correctly. For example, maybe you need to put the var directly there instead of what it says now. See if it works.
I bet it says something like DataCardValue15.Text in Update property of Montant HT_DataCard1, right?
Well of course it would be blank - the Text is blank!
So why is the Text blank? Because the solution you use requires Resetting the Control - which makes DataCardValue15.Text to be blank!
So then the solution would be:
Montant HT_DataCard1 Update Property - which now says something like DataCardValue15.Text
Either change it to var or DataCardValue15.Default - then I think it might work
Does it work?