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Power Platform Community / Forums / Power Apps / Old & New ComboBox OnC...
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Old & New ComboBox OnChange function.

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Looking for a solution for the OnChange function of any combobox. Combobox seems to self-trigger the change and results in the app loading continuously until it has passed through all of the comboboxes within a gallery. As an example, a gallery containing a list of tasks with a Task Owner. The task owner is displayed via a combobox, with the ability for the PowerApp user to change at any given time. When loading into the page, the page/gallery will refresh itself X times depending on the volume of items within the gallery. 

Dropdowns do not work for my current situation as two fields need to be seen to be selected, alongside the search function is required. Currently have a variable to be set on OnSelect of the combobox and the OnChange function "should" only operate when said variable is equal to the item in the gallery. However this does not work and results in the PowerApp flashing. 

The new combobox that has recently been published, the OnChange works but triggers multiple times when changed, and with no OnSelect function available I cannot build in the variable check to ensure that it only runs once changed. 

Why is this particular function just broken?!
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  • timl Profile Picture
    36,393 Super User 2025 Season 2 on at
    Hi CharlesH-SY,
     
    Can you clarify the formula that you're using in the OnSelect/OnChange properties, as I imagine that it's possible to accomplish what you want to achieve without the use of variables. For example, if you only want some formula to run OnChange when the value in the CombBox has changed, you could use this sort of formula in a gallery to compare the combobox value with the initial record value.
     
    If(cboTaskOwner.Selected.Value <> ThisItem.Selected.Value,
       //Insert your OnChangeFormula here
    )
     

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