Conditionally Navigating through Screens

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Posted on by kriggo15

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I'm creating something similar to a "checkout" process and need major help on the navigation logic.

Right now I have 3 checkboxes (could be up to 20 in the future) that represent services. When the user chooses 1 or more checkboxes, it updates an indicator in a collection. When the user chooses to start the checkout process, they should navigate to the first screen that has "yes" as an indicator. After the user is done with that screen, they should then navigate to the next screen with a "yes" or if there isn't one, then they should end on the final screen.

Below is what I've built so far. If you see any flaws in the design, please let me know. I really need help on the navigation logic. I've been scratching my head the past couple of days and nothing has worked.

navigation ss1.png

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Building Power Apps

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Community Power Pla... Microsoft Employee on at

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First, you'll need to collect the values and which screen they are related to. you can do that this way:
Collect(NavigationCollection, {Naviagte:Checkbox1.Value,Screen:Screen1}, {Naviagte:Checkbox2.Value,Screen:Screen2}, {Naviagte:Checkbox3.Value,Screen:Screen3}, ... {Naviagte:Checkbox20.Value,Screen:Screen20} )
Then, you can navigate through those by doing this on the "Next" button's OnSelect property:
UpdateIf(NavigationCollection,Screen=App.ActiveScreen,{Navigate:false,Screen:App.ActiveScreen}); Navigate(LookUp(NavigationCollection,Navigate=true,Screen)
This sets the navigate column to false for that screen then takes to user to the next screen.
kriggo15 526 on at

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This works perfectly but I have one followup question before I close it out. How would I modify what you posted to end on say "Screen21" once there aren't any more screens set as true?

Basically when I get to the end of the loop, I want the Next button to take me to the last screen (Screen21).

Example 1: Screen2 is the only one set as true so the Next button on Screen2 would take me to Screen 21.
Example 2: Screen2 and Screen3 are true, so the Next button on Screen2 would take me to Screen 3, and the Next button on Screen3 would take me to Screen 21.

Thanks again and I appreciate your help!
Community Power Pla... Microsoft Employee on at

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All you would change is the Navigate function in my example above:
Set(NextScreen,LookUp(NavigationCollection,Navigate=true,Screen)); Navigate(If(IsBlank(NextScreen),Screen21,NextScreen)
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kriggo15 526 on at

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Thank you, much appreciated.