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Dynamically building tab List from multiselect combobox

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Posted on by Mattw112b

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I have a multiselect combo box with various options for the user to choose from, each option has different questions I want them to answer.

I'd like to use the tab list control and put each different type of question on a different tab.

I added an on change expression to the combobox:

ClearCollect(
TabCollection,
{Tab: """1. Change Details"""} // Always include this base tab
);

// Add entries dynamically based on selection
If(
"Payroll (Worksite Address, PTO Days, New 1099 Sponsor, Start Date, Expense Rates)" in ForAll(ComboboxCanvas1.SelectedItems, Value),
Collect(TabCollection, {Tab: """2. Payroll"""})
);

If(
"Billing (PO Number, CRF Project, Billing Profile)" in ForAll(ComboboxCanvas1.SelectedItems, Value),
Collect(TabCollection, {Tab: """3. Billing"""})
);

The collection gets built as expected.

Then for the items property ont he tab list I have:

[Concat(TabCollection, Tab, ",")]

It accepts this, but the problem is it only creates one tab.

I've tied a few other variations of this too... so instead of putting the double quote in the collection i tried adding in the tab list:

"[" & Concat(TabCollection, """" & Tab & """", ",") & "]"

But this kept failing saying it expected a table value.

I think it fails because it wants to see the [ and ] in there not the "[" and "]" if that makes sense.

When I put just this in a label it shows correctly:

Concat(TabCollection, """" & Tab & """", ",")

So does anyone see what I'm doing wrong here?

Thanks,

Terry

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Building Power Apps

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Answers (1)

ronaldwalcott 3,847 Moderator on at

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Concat creates a string while the Items property of the Tablist accepts a single column table which you can create in your If statement using a column called Value

Collect(TabCollectionNames, {Value: "2. Payroll"}

Set the items property of the tablist to TabCollectionNames

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Verified answer

SwatiSTW 807 Super User 2026 Season 1 on at

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What you doing wrong is trying to turn the collection into a concatenated string for the Items property of the tab list control. The TabList control expects a table (a collection with rows and columns), not a string.

1. In the OnChange property of your combo box, use the following code to build the tab collection:

ClearCollect(
TabCollection,
{Tab: "1. Change Details"}
);

If(
"Payroll (Worksite Address, PTO Days, New 1099 Sponsor, Start Date, Expense Rates)" in ForAll(ComboboxCanvas1.SelectedItems, Value),
Collect(TabCollection, {Tab: "2. Payroll"})
);

If(
"Billing (PO Number, CRF Project, Billing Profile)" in ForAll(ComboboxCanvas1.SelectedItems, Value),
Collect(TabCollection, {Tab: "3. Billing"})
);

2. For the Items property of your tab list control, simply set it to:

TabCollection

3. The tab list will use the Tab field from the TabCollection to display the tab names. Ensure you don’t try to concatenate the collection into a string.

4. To debug or check the collection, add a label and set its Text property to

Concat(TabCollection, Tab, ", ")

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