change a specific column value of the galley chosen item with default expression

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Posted on by Hanan-khamissy

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In my app i need to make the option for the user change a specific column value of the galley chosen item

on the other hand the default value to be:

"Trim(part1&" "&part2&" "&part3)"

1. I choose text input (to make it possible to write an expression in the default)

default: Trim(part1&" "&part2&" "&part3).

2. Save button Patch function to save the new value that the user choose

it is not working

how can i do it?

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Building Power Apps

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v-mengmli-msft Microsoft Employee on at

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Hi @Hanan-khamissy ,

Usually, we use Trim to remove spaces between characters, and Concat to concatate multiple characters, related reference documentation:
Trim and TrimEnds functions in Power Apps - Power Platform | Microsoft Learn
Concat and Concatenate functions in Power Apps - Power Platform | Microsoft Learn

If you are not too proficient in the use of functions, you can also provide more details for me.
I hope you can tell me what you are using "Trim(part1&" "&part2&" "&part3)" for?
In addition, I would like you to provide the patch formula.
Of course, it would be better if there were some screenshots.

Best regards,
Rimmon Li
Hanan-khamissy 140 on at

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In this form in the image in the "Perfect name " Card i want to be as default 1 + 2 +3 but also if the user want to change he can change it and to save the edited value (Submitform)
v-mengmli-msft Microsoft Employee on at

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Hi @Hanan-khamissy ,

I assume 1,2,3 in label controls and 123 in text input control.
Please try this:
Set the default of text input:
Concatenate(Label1.Text," ",Label2.Text," ",Label3.Text)
Best regards,
Rimmon
Hanan-khamissy 140 on at

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1)If I set it as the default what's happen when the user edit the default value?
in the next time we enter the app is the edit value will appear?
2) the "123" box is part of the same form of the "1" & "2" & "3" boxes (one of the cards
is it ok or i should make the "123" box as input text and then save the user input with Patch function?
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v-mengmli-msft Microsoft Employee on at

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Hi @Hanan-khamissy ,

If the user edits, of course, the content edited by the user is displayed.
User edits disappear when they re-enter the app, but not during screen switching.
In general, you can use the patch function to update the user-edited value to the original record, provided that the data types are consistent.

Best regards,
Rimmon Li