OnChange isn't working correctly

[FMontesRNX1]

I have a simple form that creates registry on a collection.
In general works, the only issue is when using a barcode scanner, to move between form questions, I've set a 'Tab' suffix instead 'Enter', so, on the last question data card value, I've set something like this on the OnChange property:

SubmitForm(Form1);
NewForm(Form1);
SetFocus(DataCardValue1)

The last line is to back to the first question when the form is submitted.

The problem is that sometimes happens this:
-After change the value and send 'Tab', doesn´t back to the first text box of first question

-Some fields still with same data of last registry sent.
This causes I need to move manually to the first question textbox and start again, but happens again after a few registries.
I've tried to set Reset(Datacardvalue) for each question on the OnChange, but still showing the last data sent.

Any ideas?

[TechieT]

@FMontesRNX1 have you tried ResetForm(Form1)?

[FMontesRNX1]

Hi, yes, by any reason, keeps some info from last submitted registry inclusively with ResetForm(Form).
Not sure if maybe the performance of formulas/app/Internet is making this work so slow and doesn't met the OnChange property all the times.

[FMontesRNX1 · Accepted solution]

Hi everyone, for now I've found a temporary solution.

Basically, I've added a new button that runs the same commands set on the OnChange property and set a specific Tab Index to both.
By this way, if for any unknown reason the OnChange commands doesn't run, the Tab will put the focus on the button instead other zone, so the person can scan again any barcode, and the button will be 'pressed', running the command to Submit the form, set New form, Reset, and setting focus on the first form field.

It doesn't solve the problem, but is working better than the previous scenario.

However any additional ideas will be welcome

[PowerApper_RS]

Hi @FMontesRNX1 , 

I had the same problem in the past. 

I had multiple datacards in my Form and I filled them with values from a barcode scanner. In the OnChange properties of the first fields I had the "SetFocus" function to turn into the next field after scanning a barcode. 

In the "OnChange" function of the last field I had the functions "SubmitForm();;NewForm();;SetFocus();;". 

First I swaped the "NewForm();;SetFocus()" functions from the "OnChange" function of the last field into the "OnSucces" function of the used Form. After that change, the bug doesn't came so often, but it was still there. 

So I did a further optimation. 

I created a timer. 

In the "OnSuccess" function of your form, you start the timer by set a defined value e.g. "VAR_Timer1" to "true". 
In the "OnTimerStart" function, you define the "SubmitForm()" function. In the "OnTimerEnd" function you define "ResetForm();;NewForm()" functions. 
Than you can try some different durations between Submit- and NewForm. 

With a high enough duration the bug was fixed in my APP in 99 percent of cases. 

For further or detailed information feel free to ask again.