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Switch Statement in Dropdown

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Posted on by Phineas

5,325 Super User 2025 Season 2

I want to 'Switch' the options available in a Dropdown depending on the content of the same Dropdown.

Dropdown (In Gallery1) -
Default: ThisItem.Color (populated default is "Blue").
Items: ["Blue","Red","Green"]

Switch Action Required: If Dropdown equals "Blue" list choices are "Blue","Red","Green"
If Dropdown equals "Red" choice is "Green"
If Dropdown equals "Green" choice is "Red"

Current Switch Statement I'm trying in Dropdown 'OnChange'. However, when I choose an item on the list the options do not change in accordance with my switch.

At this point the default content of Dropdown1 is "Blue" - I click 'OnChange' in which in which is the following -

Switch(Dropdown1.SelectedText.Value,
"Blue"
[{Value: "Blue"}, {Value: "Red"}, {Value: "Green"},

"Red"
{Value: "Green"},

"Green"
{Value: "Red"})

Categories:

Building Power Apps

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v-qiaqi@microsoft.com on at

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Hi @Phineas,

Could you please share a bit more about your scenario?

Set a variable for OnChange property:

Set(varItems,Dropdown1.Selected.Value)

Write the Switch() in the Items property:

Switch(varItems, "Blue" ["Blue","Red","Green"], "Red" ["Green"], "Green" ["Red"])

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Phineas 5,325 Super User 2025 Season 2 on at

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Currently I have in Drodown1:
Dropdown1 - Items: ["Blue","Red","Green"]
Dropdown1 - Default - ThisItem.Colors

The above default "Blue" into Dropdown1 and provides a list of the three colors to choose from.

I've followed your recommendations; When I updated Dropdown1 as follows no default content appears and no list of items is available.

1. I placed the variable in Dropdown1 'OnChange'

Set(varColorChoices,Dropdown1.Selected.Value)

2. I placed the Switch in Dropdown1 'Items'.

Switch(varColorChoices,
"Blue",
["Blue","Red","Green"],

"Red",
["Green"],

"Green",
["Red"])

With the above update nothing appears as default, and nothing appears in the list.

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Verified answer

v-qiaqi@microsoft.com on at

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Hi @Phineas,

I have seen that you have solved this issue here, I will mark here to close this case.

Thanks for your cooperation.

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