Power Platform Community Forum Thread Details

I have Powerapps Canevas, i have component with comboList, my component have intput and output variable and i have action; my combolist use the action for return collection, when i use in my application, my code there is no error; but my action doesn't retun the collection in my application, this is my code :

Name of my component : Ordre_Jour_Banner

Variables of my components :

variable 1 :

name : seanceCol

type : data

definition : input

type : table

variable 2 :

name : pointODJCol

type : data

definition : input

type : table

variable 3 :

name : oncochange

type : action

return data type : voide

and in Ordre.jour.banner.OnCochange i have this code :

Set(getNewItem_seanceCM;LookUp(
    Ordre_Jour_Banner.seanceCol;
    Text(
        momentum_date_et_heure;
        "yyyy mmmm dd"
    ) = DropdownCanvas2.Selected.Value
));;

Set(Seanceid;getNewItem_seanceCM.momentum_seance_du_conseil_municipalid
);;



Set(type_sean_cm;getNewItem_seanceCM.momentum_type_de_seance_texte);;
Set(date_sean_cm;getNewItem_seanceCM.momentum_date_et_heure);;
Set(seance_cm;getNewItem_seanceCM.momentum_type_de_seance_texte);;

//chargement des nouveaux odj

ClearCollect(
    odj_cm_collection;
    Filter(
        Ordre_Jour_Banner.pointODJCol;
        'Séance du conseil municipal'.'Identifiant unique' = Seanceid
    )
);;

in my application when i chage the value of my combolist, my odj_cm_collection doesn't charge, my function doesn't return odj_cm_collection

thank you for response

Categories:

Building Power Apps

Hi @khedidja90,

Why it’s not working
This is a component scope vs app scope issue and a misunderstanding of what behavior (action) properties can do:

Behavior/Action properties don’t return values.
A custom action (behavior) property can execute a formula in the parent app (where the component is placed), but it cannot return a value to the caller. So you can’t “return a collection” from a behavior property. The return type is effectively void.

Components cannot reliably set app-level variables/collections directly.
Inside a component, using Set() or ClearCollect() does not guarantee writing into the hosting app’s global variables/collections. Components are intentionally sandboxed. The recommended (and supported) way to pass data out of a component is through output properties (custom properties of type Output).

Don’t try to Set(Seanceid, ...) or ClearCollect(odj_cm_collection, ...) inside the component to affect the app. Use output properties.

Change/replace the names according to your schema.

I) Inside your component (Ordre_Jour_Banner)
A) Inputs (you already have these)

Input seanceCol → Table
Input pointODJCol → Table
Action oncochange → Behavior (no return value)

B) Add Output properties (this is the key)
Create these Output properties on the component:
1) SelectedSeance (Output, Record)

Gives you the full selected séance row once the dropdown changes.

Formula (comma locale):

// Output property: SelectedSeance
With(
    {
        rec: LookUp(
            Self.seanceCol,
            Text(momentum_date_et_heure, "yyyy mmmm dd") = DropdownCanvas2.Selected.Value
        )
    },
    rec
)

2) SelectedSeanceId (Output, Text or GUID—match your data type)

Exposes the ID needed to filter your ODJ.

// Output property: SelectedSeanceId
Self.SelectedSeance.momentum_seance_du_conseil_municipalid

3) PointsFiltered (Output, Talbe)

This is what the app will ClearCollect into odj_cm_collection.

// Output property: PointsFiltered
Filter(
    Self.pointODJCol,
    'Séance du conseil municipal'.'Identifiant unique' = Self.SelectedSeanceId
)

C) Dropdown setup inside the component
Items (recommended)
If your dropdown shows dates as text that match Text(momentum_date_et_heure, "yyyy mmmm dd"), set Items to:

Distinct(
    AddColumns(
        Self.seanceCol,
        DisplayDate,
        Text(momentum_date_et_heure, "yyyy mmmm dd")
    ),
    DisplayDate
)

If you already use a diferent Items schema that results in DropdownCanvas2.Selected.Value being the display txet, you can keep it.

OnChange (inside the component)
Call the action so the parent can react:
ThisComponent.oncochange()

Do not Set() or ClearCollect() to app-level state inside the component.

II) In the Parent App (where you dropped the component)
Select the component instance on your screen (e.g., Ordre_Jour_Banner_1) and wire its action property.
A) Component’s oncochange property (in the app)
When the dropdown changes, we will rebuild the app-level collection from the component’s output:

oncochange
ClearCollect(
    odj_cm_collection,
    Ordre_Jour_Banner_1.PointsFiltered
);
// Optional: capture scalars for convenience
Set(Seanceid, Ordre_Jour_Banner_1.SelectedSeanceId);
// If you created these outputs:
// Set(type_sean_cm, Ordre_Jour_Banner_1.SelectedSeanceType);
// Set(date_sean_cm, Ordre_Jour_Banner_1.SelectedSeanceDate);

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