Setting Value in Declare Expression

General
,
1

I am working with a three‑level Page List structure. Within PageList2, there is a nested PageList3, which is rendered in the UI as a table. PageList3 contains two columns: Type and Number of Devices.

For each load type, I need to copy the corresponding Number of Devices value into another property and make it available in real time on the UI for further processing.

I attempted the following approaches:

  • Used a Declare OnChange rule with the watched property set to PageList2.NoOfDevices and invoked an activity, but the declare rule is not firing at all.

  • Tried a Declare Expression rule by setting
    DesiredProperty = ValueOf(PageList.NoOfDevices), but the expression does not validate or allow saving.

I cannot move this logic to a Post Data Transform, as the value is required immediately on the UI for other operations.

Could someone please advise on the correct approach to handle this scenario?

2

Hello @Priyam

You are going in the right direction. May be few adjustments and it should work.

For your scenario, you can try,

Create a property CountOfDevices of type Integer and create a declare expression for the same with below code,

.CountOfDevices = Value of = @LengthOfPageList(.PageList3) (or)

.CountOfDevices = Count of = .PageList3() using entries in which = .Type!=””

image
image830×368 24.7 KB

image
image1008×356 28.2 KB

image
image1022×355 27.8 KB

The first option will just take the count of the page list 3 entries. You have to ensure that your type and number of devices are marked as required during entry

The second option will take the count of entries in page list 3 with a certain condition if you wish to, else you can give @when(Always)

You can choose any one of the option based on your requirement.

Below is my structure

Work case → .Questions() → .Fields()

I should be able to get the count of fields setup for each question on the question level.

Below is an working example with two levels of pagelists. It should work for you as well

If your requirement is anything different, please share any mockups or detailed requirements so that we can suggest more options.

Hope this helps

Regards

JC