ListBox Item Uncheck issue

Hi Experts,

In the attached file I have created ListBox and it is working fine, if end user first uncheck the Item “All”. However if Item “All” is checked or selected then it is not allowing to uncheck any another Item from the list.

How can I unselect Item “All” and particular unchecked Item from listbox, if end user unchecked the any another item.

e.g. If Item “All” is selected (all item selected) and user unchecked the any another Item then Item “All” and that particular item need to be unchecked.

Please refer attached file for details and code.

Thanks in Advance

Do you need to select all the other items when All is selected?

Yes, If Item "All" is selected then rest all item should be selected.

But if any another item unchecked by user then that particular Item and "All" need to be unchecked.

Why do they need to be selected?

Can't you check if the All option has been selected in subsequent code.

Actually I am unable identify the unchecked item number or index number of unchecked item when user unchecking/unselecting the item.

e.g. I wanna create it like auto filter dropdown

1) If All is checked then entire list should be selected
2) If All is unchecked then entire list should be unselected (If all items are checked)
3) If all items are checked and any one unchecked (other than "All") by user then only Item All and that particular item should be unchecked.

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solved my problem

How did you solve it?

Attached is the solution

Could you share the solution?

Have you checked attached file ?

No I'm unable to download it.

Attached again in this post, please check