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Comparing comboBox selected Item with choice column values

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Posted on by wagnerortizz

Hi!
I need to avoid a user to patch values in a choice column if such values already exist.

In other words, I need to get the selectedItems in a combobox and check if they already exist in a choice colum (in SharePoint list).

It seems easy...but I have been trying this for over 4 days! loool
Any tips?

Thanks a lot in advance!

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Building Power Apps

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alaabitar 1,503 Super User 2024 Season 1 on at

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Hello,

You can activate the enforce unique values at the column level in sharepoint.

Best regards,
Alaa

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wagnerortizz 45 on at

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Yeh..Thanks a lot..
I believe it desnt work to me because indeed I cant have the same value, but only coming from the same person...
Person A can only choose "Orange" once. If he/she tries to choose "Orange" again, I block.
But person B can still choose his/her "Orange". Thats why I am gonna have repeated value in the colum, but not coming from the same person....gotcha?

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wagnerortizz 45 on at

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The problem I am facing is because Choice Column return registers. So each option/each choice is a register. But in ComboBox, each choice is a Table. And that is driving me crazy...cuz I need to compare them, but can't

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v-yujincui-msft Microsoft Employee on at

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Hi @wagnerortizz ,

Does your choice column allow multiple selection?

I did a simple test with a choice column that doesn't allow multiple selections for your reference.

I put all the existing options into a collection before submitting the data, and then determine whether the current option is in the collection.

1. Here is my List.

2. Here is my App.

ClearCollect(collectionname,Distinct(AddColumns(datasource,"newcolumnname",ChoiceColumn.Value),newcolumnname)); If(Form1.Mode=FormMode.New,If(DataCardValue9.Selected.Value in collectionname,Notify("Please choose another option"),SubmitForm(Form1)),SubmitForm(Form1))

Result Screenshot:

Best Regards,
Charlie Choi

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