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Checking for empty field values in records in gallery

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Posted on by Community Power Pla... Microsoft Employee

I have a Gallery that displays 1 or more records based on user selection. The record(s) contain multiple fields, of which I need to verify that 2 fields (Asset ID, VIN) in all records displayed in the gallery contain values when the user presses a save button. I have the following code in place and it works, but I'm curious if there is a more efficent way to do this, as it feels a bit clunky to me (creating a collection to hold the rowcounts of blank records).

Here is the screen:

2019-09-19 10_06_41-Equipment Requester Admin - Saved (Unpublished) - PowerApps.png

Here is the code:

Clear(ValidateCollection);

//Create a new collection to check if all required fields are populated
ForAll(
 EquipmentGallery_DetailsScreen.AllItems,
 If(
 IsBlank(AssetIDTextInput_DetailsScreen.Text) || IsBlank(VINTextboxInput_DetailsScreen.Text),
 Collect(
 ValidateCollection,
 {RequestID: RequestIDDataLabel_DetailsScreen.Text}
 )
 )
);
//If we have rows, then we have blank required field entries
If(
 CountRows(EquipmentGallery_DetailsScreen.AllItems) <> 0,
 "Save code goes here", 
 UpdateContext({conValidationErr: true, conValidationMessage: "!"})
)

I use the context variable to drive user feedback for the required fields.

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Building Power Apps

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wyotim 2,545 on at

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Hey @Anonymous, here's the way I would go at it. In the EquipmentGallery_DetailsScreen gallery I would hide (Visible property = false) a text label with the following:

IsBlank(AssetIDTextInput_DetailsScreen.Text) || IsBlank(VINTextboxInput_DetailsScreen.Text)

which will produce a boolean (true/false) value for each row of the gallery (true if one or more of those text inputs are blank, false otherwise). Next, I would count how many of those text labels are true like so:

CountIf(EquipmentGallery_DetailsScreen.AllItems.lblBlankItems, lblBlankItems.Text = "true")

where lblBlankItems is the name of the aforementioned text label. Note that the "true" is a text value and in double-quotes as we are checking the label's text, not for a true/false value in the typical sense. If this count is equal to zero, all of those fields have an entry. If not, one or more is missing an entry.

If you did something like :

If( CountIf(EquipmentGallery_DetailsScreen.AllItems.lblBlankItems, lblBlankItems.Text = "true") = 0, "Save code goes here", UpdateContext({conValidationErr: true, conValidationMessage: "!"}) )

I think you could cut out the entire collection business altogether.

Let me know if that works for you or not; I'd be happy to follow up if needed!

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Community Power Pla... Microsoft Employee on at

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Beautiful! That was a brilliant idea and way less clunky than what I had. Thank you!

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wyotim 2,545 on at

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You are most welcome! Happy to be able to help!

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abc 123 789 Moderator on at

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Worked great, Thanks!

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Frown 46 on at

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It didn't work for me, but it taught me a new technique that will be valuable in future. Thank you!

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tu22 44 on at

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I am try to check for empty rows within the gallery and count the empty rows but all the rows are empty but it shows false. what am i missing?

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