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Data Table with unknown number of columns - Dynamic collection

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Hi,

I've developing an survey app which contains a table where only first column is fixed (it's always the same), but this table could have 1 or 2 or more additional columns, and they depends on amounts of buildings to visit.

In other words, each user of my app can build a table where he/she will choose the amount the buildings to visit (it can be 1 or 100) and then in each visit the user can load the necessary amount of SpecificParts for each visited building.

Each user will create a different Table each time, which will have a different number of columns each time.

so, the deliverable table should be looks like:

DeliverableTable= { SpecificParts, Building #1, building #2,.......}

I was trying with following simple example

ClearCollection(colFixColTable, { SpecficPart: "KTN2134"} )

also, in a Text Input, the user must write each name of building to visit

and adding a Data Table:

DataTable1.Items = ClearCollection( colDelivTable, AddColumns(colFixColTable, BuildingNames.Text, 0) )

but it's seems does not work

seems it is not possible to add columns to a collection dynamically.

Any idea or help will be appreciated. Thank U!

Cheers

FSio

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Building Power Apps

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Verified answer

CNT 10,921 Super User 2024 Season 1 on at

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@FSio Firstly, DataTable1.Items = In PowerApps you cannot assign values like this. You have to set the desired value in the Items property of the control (DataTable1).
Secondly, the columns names(s) in AddColumns has to be a string (for example, "Name" with double quotes included). It cannot be a variable or refer to a string elsewhere.
To solve your problem, you shouldn't be adding 1 - 100 columns but rather have a set number of fixed columns like BuildingNo, PartNo etc., and then add 1 - 100 records depending on how many visits the user makes.

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WarrenBelz 153,032 Most Valuable Professional on at

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Hi @FSio ,

For your first

ClearCollect( colFixColTable, {SpecficPart: "KTN2134"} )

Your data table Items - assuming you want a text field

AddColumns( colFixColTable, "BuildingNames", "0" )

Please click Accept as solution if my post helped you solve your issue. This will help others find it more readily. It also closes the item. If the content was useful in other ways, please consider giving it Thumbs Up.

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Drrickryp Super User 2024 Season 1 on at

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@FSio

It seems to me that your basic design should consist of two tables in a one to many relationship. The parent table would be specific part and any description related to it and the second table would be buildings with a reference back to the ID of the part. You could then number each building in the child table and there would be no limit to the number of rows in that table. This design is flexible in that you could search for buildings by part and also parts by building.

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