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Populating dropdown value based on other dropdown

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Posted on by Community Power Pla... Microsoft Employee

Hi there,

I am quite new to PowerApps so my apologies for this rather simple question.

I have 6 dropdowns with the same items in all of them: "Chosen" and "Rejected". All dropdowns are named Dropdown1, Dropdown2 etc.
If I select Chosen in one of the dropdowns, I want the rest of the dropdowns to automatically select "Rejected", vice versa if I change a Rejected dropdown to Chosen, the whole operation starts again.

How would you solve this? I tried to look at default values but without any luck 😞

Thanks in advance,

/Casper

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JR-BejeweledOne 5,836 Moderator on at

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In your default items for each control you will need a formula similar to this: Each control will have 5 statements to evaluate and will reference the other 5 controls.

Here are 2 ways you could do this: This one would be set on Dropdown1 (On dropdown2, you would be referencing dropdowns 1, 3,4,5,6 and so on for each subsequent control)

If( Dropdown2.Selected.Value = "Chosen" Or Dropdown3.Selected.Value = "Chosen" Or Dropdown4.Selected.Value = "Chosen" Or Dropdown5.Selected.Value = "Chosen" Or Dropdown6.Selected.Value = "Chosen", "Rejected", "")

If(
   Dropdown2.Selected.Value = "Chosen", "Rejected",
   Dropdown3.Selected.Value = "Chosen", "Rejected",
   Dropdown4.Selected.Value = "Chosen", "Rejected",
   Dropdown5.Selected.Value = "Chosen", "Rejected",
   Dropdown6.Selected.Value = "Chosen", "Rejected",
   ""
)

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Community Power Pla... Microsoft Employee on at

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Thanks for the tip!

I tried to do that, inserted the first If formula in the defaults value of dropdown1 with success. But I get circular reference errors when I try and insert the changed formula on dropdown2 and the other ones. Don't really see how to fix that 😞

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JR-BejeweledOne 5,836 Moderator on at

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I will see if I can figure it out. Other than this are these dropdowns dependent on each other at all? Is the items property for each ["Chosen", "Rejected"] or are they getting the values from a data source?

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JR-BejeweledOne 5,836 Moderator on at

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Here you go.

On your app load set a variable like this where 'Dropdowns' is the name of the variable:

Set(
    Dropdowns,
      {
        Dropdown1: false,
        Dropdown2: false,
        Dropdown3: false,
        Dropdown4: false,
        Dropdown5: false,
        Dropdown6: false
     }
)

On each of your dropdowns use this formula changing it as needed based on which dropdown you are setting.
Dropdown1 would be:

If(
Dropdown1.Selected.Value = "Chosen", Set(Dropdowns, {Dropdown1: true, Dropdown2: false, Dropdown3: false, Dropdown4: false, Dropdown5: false, Dropdown: 6 false})
)

Dropdown2 would be:

If(
Dropdown2.Selected.Value = "Chosen", Set(Dropdowns, {Dropdown1: false, Dropdown2: true, Dropdown3: false, Dropdown4: false, Dropdown5: false, Dropdown: 6 false})
)

And so on for each dropdown.

Set the default property for each dropdown:
So the default property for Dropdown1 would be:
If(
Dropdowns.Dropdown1 = false, "Rejected",
Dropdowns.Dropdown1 = true, "Chosen",
Dropdowns.Dropdown1 = false & Dropdowns.Dropdown2 = false & Dropdowns.Dropdown3 = false & Dropdowns.Dropdown4 = false & Dropdowns.Dropdown5 = false & Dropdowns.Dropdown6 = false,
""
)

And the default property for dropdown2 would be:

If(
Dropdowns.Dropdown2 = false, "Rejected",
Dropdowns.Dropdown2 = true, "Chosen",
Dropdowns.Dropdown1 = false & Dropdowns.Dropdown2 = false & Dropdowns.Dropdown3 = false & Dropdowns.Dropdown4 = false & Dropdowns.Dropdown5 = false & Dropdowns.Dropdown6 = false,
""
)

And so on.

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Community Power Pla... Microsoft Employee on at

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Thank you for this! Working with a global variable makes sense!

I have one question that I do not fully understand; you wrote that: "On each of your dropdowns use this formula changing it as needed based on which dropdown you are setting".

Where exactly do I change this formula? OnSelect, OnChange or? It cannot be the default property, since this is another formula 🙂

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JR-BejeweledOne 5,836 Moderator on at

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My apologies. I give you this elaborate setup and forgot to tell you where to use it! Yes it is used in the OnChange property.

I also see an error I needed to fix in the example for the dropdown2 default formula. It should have read (and I will fix it for others to see):

And the default property for dropdown2 would be:

If(
Dropdowns.Dropdown2 = false, "Rejected",
Dropdowns.Dropdown2 = true, "Chosen",
Dropdowns.Dropdown1 = false & Dropdowns.Dropdown2 = false & Dropdowns.Dropdown3 = false & Dropdowns.Dropdown4 = false & Dropdowns.Dropdown5 = false & Dropdowns.Dropdown6 = false,
""
)

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Community Power Pla... Microsoft Employee on at

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Thank you very much!

I think this solved it - even though I have some 'errors', it at least now works every time I select "chosen".

Excellent suggestion and help!

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JR-BejeweledOne 5,836 Moderator on at

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If you don't mind me asking, what 'errors' are you seeing?

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