DefaultSelectedItems ofr modern combobox 2026

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Posted on by Atul Vijay K P

While trying to us a combobox inside a gallery. I am trying to show the default item of the colum by This item. columnname. For this case i used [Lookup(Datasource,columnname=Thisitem.columnname)] to get table output. The intresting thing is that the combobox just takes the first item of the items as default selected. Is this a bug of the new combobox?

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SebS 4,826 Super User 2026 Season 1 on at

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I would say try one of this approuch

ComboBox.DefaultSelectedItems =
Filter(
Datasource,
columnname = ThisItem.columnname
)

Or

With(
{rec: LookUp(Datasource, columnname = ThisItem.columnname)},
If(!IsBlank(rec), [rec])
)

Should work

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Atul Vijay K P 11 on at

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@SebS I tried this way but unfortunately same result. The interesting part is that if we are using the old combo box its working fine. When i use the latest released combobox(new) its not working. When i use the comboboxcanvas (previous), even using the formula [ThisItem.columnname] works.

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11manish 3,333 on at

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Not a bug
It seems that It’s a data structure mismatch issue

Fix by:

Using DefaultSelectedItems correctly

Ensuring matching schema

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Atul Vijay K P 11 on at

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My Data source is a SQL table named Plant data - It consists of 3 columns, Business line, Area, Plant. I am using the combo box inside a gallery. The Items of the gallery is a Dataverse table It contains Plant column along with others. Both the columns as of type text. The datasource of combobox is Filter(SQL,Business line<>"ABC").ItemLabelText is ThisItem.Plant.The defaultselecteditems is [LookUp(SQL, Plant = ThisItem.Plant)].
I tried all these logics in the comboboxcanvas & it works. Here it taking the first item of the list as default.

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WarrenBelz 155,840 Most Valuable Professional on at

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@Atul Vijay K P,

I will add here that if the Items of the Combo Box is
Filter( SQL, Business line <> "ABC" ).ItemLabelText

and the Combo Box is a Single Selection then the DefaultSelectedItems should be
{ItemLabelText: ThisItem.Plant}

although I cannot see any reference to ItemLabelText in the fields you mention.

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Atul Vijay K P 11 on at

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@WarrenBelz Thanks for the reply. What i was trying to explain was the below are the fields that i am filling.
Data source: Filter(SQL,Business line<>"ABC")
Item label text: ThisItem.Plant
Default selected items: [LookUp(SQL, Plant = ThisItem.Plant)]

Sorry for the confusion.

But I tried this way you advised. Made the table into single column table (Plant Only) & added default selected as a record. IT WORKED!!!!

Data source: Filter(SQL,Business line<>"ABC").PLANT
Item label text: ThisItem.PLANT
Default selected items: {PLANT: ThisItem.Plant}

From this experience, I am in the understanding that the items of the combo box should be a single column table & the default selected items should be of type record only & not table.

Is this right?

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WarrenBelz 155,840 Most Valuable Professional on at

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Hi @Atul Vijay K P,

The DefaultSelectedItems structure depends on whether it is a single or multiple selection and/or field. You need to reference the DisplayFields reference (the field name you are displaying in the drop-down) and the field name you are writing to/reading from in the format. In your case, for a Single selection/field. This is technically a Record, but is really a one-Record Table, which a Combo Box expects in its structure.
{DisplayFieldName: ThisItem.DataSourceFieldName}

Multiple selection is a Table, but the structure with SQL is not the same as (example SharePoint in a Multi-value choice field)
ForAll( ThisItem.DataSourceFieldName As _Data, {DisplayFieldName: _Data.Value} )

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WarrenBelz 155,840 Most Valuable Professional on at

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Hi @Atul Vijay K P,

A quick follow-up to see if you received the answer you were looking for. Happy to assist further if not.

Please ✅ Does this answer your question if my post helped you solve your issue. This will help others find it more readily. It also closes the item. If the content was useful in other ways, please consider answering Yes to Was this reply helpful? or give it a Like ♥
Visit my blog Practical Power Apps LinkedIn

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