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Creating a unique number

Avatar

Level 3

I want to create a form-number based on the date and time.

I've created a FormCalc script that works in Livecycle, but in Acrobat Pro it doesn't work (a fixed number appears, based on the date and time of the PDF i created in LiveCycle)

if (Hasvalue(Field)) then


null


else


Field.rawValue = concat ((num2date(date(), "DDMMYYYY")), (Num2Time(time(), "HHMMSS")))


endif

The number has to be locked.

But with my solution it wil regenerate after resetting the form.

Is there a better solution?

0 Replies

Avatar

Level 3

Trying an other solution gave the same problem

if ($.rawValue==null)then
$.rawValue = Concat(Num2Date(date(), "DDMMYYYY"), Num2Time(time(), "HHMMSS"))
else
$.rawValue
endif


The Preview in LiveCycle works perfect.

But after exporting to PDF, the field has the creation date/time of the PDF.

Of cource resetting the fields results in a new generated number.

This brings me to the folowing problem.

If i get it to work, then i have to open the PDF in Acrobat Pro to enable the Reader Rights.

So opening the pdf and resetting the fields will generate the number.

Can anyone tell me how to do this?

Avatar

Level 3

I've tried it with a Javascript and placed this at "form:ready"

This seems to work

if (xfa.resolveNode("Field").rawValue != null){

          }

     else

          {

          xfa.resolveNode("Field").rawValue = util.printd("ddmmyyyyHHMMss", new Date());

          }

But when i reset the form, the number is also reset

Is there a way to prevent a Field to be reset?

Avatar

Level 10

Hi,

You could move the script to the docReady event, as I don't think this will be affected by the reset.

Hope that helps,

Niall

Avatar

Level 3

That's the problem

I need to enable the Reader Rights

So i have to reset that field one time

Any suggestions?

Avatar

Level 10

Hi,

Do you need the number to reflect when the form is developed/deployed?

Or do you need the number to change every time the form is opened by the users and submitted?

Niall

Avatar

Level 3

It's for a declaration form, the user must download this from a server.

The number must be generated when the user opens the form the first time.

When the user saves the document, that number must also be saved, so the same number will show up when the user opens that form again.

It's not permitted to change that number (not even on reset)

I hope you understand my poor English

Avatar

Level 10

Hi,

Your English is fine, and I think I know what you are trying to achieve.

It would be easier if you were using the full LiveCycle Enterprise Suite. This server product allows for a workflow and could assign a unique number to the form.

If you are using LC Designer to generate a form and then deploy it standalone then it becomes more difficult to control a unique number.

I think that having the script happen when the form is opened is complicated, as it will change every time the form is opened. You could set the reference number based on a field or fields being not-null. See example here: https://acrobat.com/#d=E4m9qZun8wUBkaSQnR8gNA

To get around the reset problem, you could assign the reference number to a variable; reset the form; and then reassign the variable to the reference number field. Again this is in the sample above.

If you do a search in this forum you will see how other users have tackled the unique number problem.

Hope that helps,

Niall

Avatar

Level 3

Found the answer (i think it's stupid that it works this way, but who am i....)

I've used this script to generate my number

That number will be saved with the PDF and doesn't change when i save, close and open the pdf again

if (xfa.resolveNode("FieldName").rawValue != null){

          }

     else

          {

          xfa.resolveNode("FieldName").rawValue = util.printd("ddmmyyyyHHMMss", new Date());

     }

Now comes the fun part

I've created a script object with the script above and put a script reference at: myField -> Form:ready

Now when i open the PDF in Acrobat Pro, the number shows up and can be saved as i want.

But when i reset the form, my number disappears and a new number generates after i save, close and reopen the PDF.

BUT!!! When i insert the complete script at: myField -> Form:ready

Then a new number will be generated after i reset the form

Can you explain this behaviour?

Now i've used the last option, so a new number will generate on reset.

For saving the form with Reader Rights enabled, i created a button with a script that makes the number field empty and the button hidden:

FieldName = ""

ButtonName.presence = "hidden"

Avatar

Level 10

Hi,

If you are only using the script once, I would keep it in the form:ready event of the object. It really only makes sense to use a script object if you are reusing the script several times in the form.

Also you shouldn't have to resolveNode the object in your script.

You could simplify the script by testing == null instead of != null, for example:

if (FieldName.rawValue == null)

{

     FieldName.rawValue = util.printd("ddmmyyyyHHMMss", new Date());

}

I have updated the example to reflect your method: https://acrobat.com/#d=7MTJmmhWCVSfQQir3XwxXQ

In order to get over the reset button generating a new number, you could add to the standard reset script to save the current reference number into a variable.

var vRef = referenceNumber.rawValue; 

xfa.host.resetData();

referenceNumber.rawValue = vRef;

The purpose of the last button is clear, because the reference number will be set when you open the form in Acrobat to apply the rights. Good catch.

Niall

Avatar

Level 3

Is it possible to get a script for a shorter length of generated numbers? e.g a comb of 4 - 5 numbers?