How to dynamically set "Item" property in "form" control

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Posted on by Community Power Pla...

I would like to set dynamically the item to be edited in a "form" control.

Usually the "item" property is set to "Gallery.Selected".

Do I now need to change the gallery.selected data? Or can I directy set the value of the "Item" property?

Can I set "gallery.selected" or the "item" property by the "on select" event? If so, how?

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Building Power Apps

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Rebetcha 645 on at

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In the item property there should be a reference to a record. What you could do is use a collection in which you store the item that you want to use on the form and reference that record in the 'item'-property. You need to add a clearcollect function to create the record in the collection to every part of the app from where you want to navigate to the 'form'-control. Of course the order of the function should be: first the clearcollect and second the navigate.

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v-micsh-msft on at

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Hi @Anonymous,

It is recommended to take a look at the following article first:

Understand data forms in Microsoft PowerApps

To have the Form control work property, we need to configure the DataSource property and the item property.

Item property is one single record from the table configured under DataSource property.

By default, the DataSource is not allowed to change once configured, but for the item property, we could take use of filter functions to find the proper record,

For example (using Display form as an example):

We have the following table as data source:

1. Data Source configured to

'[dbo].[Product]'

2. Add a button, OnSelect property configured to:

UpdateContext({ProductID1:If(ProductID1>5,ProductID1-4,ProductID1+1)})

3. Item property configured to :

LookUp('[dbo].[Product]',ProductID=ProductID1)

When click the button, the item would change to the corresponding record:

EditForm is only available to configure the item property with Edit Mode, for more details, please check:

Edit form and Display form controls in PowerApps

Regards,

Michael

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Community Power Pla... on at

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Thank you for this hint.

I have implemented this and it worked well.

I did the following:
- created 4 screens (newPage1, newPage2, editPage1, editPage2)
- Item property in NewForm1 and NewForm2 is empty
- On the submit button I do the following (this is probably the complicated part):
Patch(PowerAppsMultiPageDemo,Defaults(PowerAppsMultiPageDemo),{Title: DataCardValue9_1.Text,Feld1: DataCardValue10_1.Text},NewForm2.Updates);Navigate(BrowseScreen1,Cover)

For the edit Pages it was slightly easier:
- Item Property of EditForm1 and EditForm2 is set to "Gallery.Selected"
- On submit I do the following:
Patch(PowerAppsMultiPageDemo,BrowseGallery1.Selected,EditForm1.Updates,EditForm1_1.Updates);Navigate(BrowseScreen1,Cover)

The only downside of it is that such an architecture is quite effortful. especially when it comes to changes, one always has to consider dependencies to the rules.

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Community Power Pla... on at

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Thankts for the second hint.

I'm curious to see if this leads to an even simpler approach.

I didn't know that I can filter the item property like this.

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OrangeJuiceCup 24 on at

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Thank you very much, Michael (v-micsh-msft)! That was just what I needed.

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Community Power Pla... on at

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You helped me a lot! Thanks! 🙂

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Patrick42 4 on at

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Similar question, but what should you set "item" as when you want to create a new item

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