Get the selected items inside a List Box and assign them to a SharePoint text field Defult property

Question

I have a ListBox inside my Power Apps screen, as follow:

And I have a hidden text box, where I want to define the Default value for the text box to be the selected items (if any) from the ListBox separated by ",".

So from the above screen the Default value for the text box should be "Wireless Mouse/Keyboard", while if the user select all the values inside the List Box, then the Default value for the textbox should be "Docking Station, Wireless Mouse/Keyboard, Monitors ".

Any advice on this please?

Answer 1

Use below formula in Default property of text box control:

Left(
    Concat(
        ListBox1.SelectedItems,
        Value & ", "
    ),
    Len(
        Concat(
            ListBox1.SelectedItems,
            Value & ", "
        )
    ) - 1
)

Where ListBox1 is the name of ListBox control.

Output: