How to enable pre-load data for next screen

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Posted on by Ilhamsyah

Hi All,

i'm building some apps where some of the formula would be like this.

If(IsBlank(Question1_1.Text) = false, Navigate(Question_SafeandClean,ScreenTransition.UnCover), If(IsBlank(Question1_2.Text) = false, Navigate(Question_FoodDefence,ScreenTransition.UnCover),If(IsBlank(Question1_3.Text) = false, Navigate(Question_Waste,ScreenTransition.UnCover), If(IsBlank(Question1_4.Text) = false, Navigate(Question_Pest,ScreenTransition.UnCover), If(IsBlank(Question1_5.Text) = false, Navigate(Question_Utilities,ScreenTransition.UnCover), If(IsBlank(Question1_6.Text) = false, Navigate(Question_SafeWork,ScreenTransition.UnCover), If(IsBlank(Question1_7.Text) = false, Navigate(Question_Chemical,ScreenTransition.UnCover), If(IsBlank(Question1_8.Text) = false, Navigate(Question_Emergency,ScreenTransition.UnCover), If(IsBlank(Question1_9.Text) = false, Navigate(Question_HighRisk,ScreenTransition.UnCover), Navigate(SummaryScreen,ScreenTransition.UnCover))))))))));

It basically filtering the list of questions in the next screen once i click the submit button in the previous screen, once clicked it would check the next available question, the screen with no questions would be skipped.

however the problem once we start to use it in mobile apps sometimes the screens that had questions in it are not finished load the data, creating the logic that this screen "not having a question" then apps would skip that screen.

Is there any way for me to workaround on this? Maybe make the apps to load all the data in every screen when start the apps?

Thanks in advance for your help!

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Pro_User_365 546 on at

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Hello @Ilhamsyah ,
I understand you're looking to preload data for screens in your PowerApps application to ensure that data is ready when a screen is navigated to. Here's a succinct solution:
To preload data, you can utilize the App.OnStart event to load all necessary data into global variables or collections. This will load the data when the app starts rather than at the time of navigation. Here’s an example:
// In App.OnStart ClearCollect(GlobalQuestions, DataSource);
Replace DataSource with the source of your data.
Then, use a context variable set to false by default and switch it to true after data is loaded on the screen's OnVisible property:

// In Screen's OnVisible Set(IsDataLoaded, false); // Your data loading logic Set(IsDataLoaded, true);
When navigating, include a check to ensure IsDataLoaded is true:
If( IsDataLoaded && !IsBlank(Question1_1.Text), Navigate(Question_SafeandClean, ScreenTransition.UnCover), // ... other conditions );
With this approach, you ensure the data is ready and accessible before the user navigates through the screens, thus preventing screens from being skipped due to unloaded data.
Best regards,

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Ilhamsyah 18 on at

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Hi @Pro_User_365 ,

thanks for helping and sorry for delay reply.
i've already tried the coding and it seems that it still had some screen skipped due to data is not loaded yet.

for this part :
// In Screen's OnVisible Set(IsDataLoaded, false); // Your data loading logic Set(IsDataLoaded, true);
i'm type all the coding in the onvisible property of my home screen like this, is this correct?

and this is my coding for the navigation

Thanks in advance, and Happy New Year!

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