Custom Page with a gallery having a dropdown control gets cleared after Patch

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Posted on by Mira Ghaly

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Hi All,

I am running into an issue with a dropdown in a gallery so I have a dropdown modern control in a gallery as below:

There is a save button that does a patch on changed records , after the patch I am refreshing the gallery source but what happens is the dropdown gets cleared afterwards, I have tried with classic Controls still same problem.

Anyone has faced this issue?

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WarrenBelz 156,550 Most Valuable Professional on at

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Hi @Mira_Ghaly ,

Whenever you action something from within a Gallery, it resets itself and all controls revert to their Default value, so that Combo Box needs to be defaulted to the value you just patched. If the Items are from a collection, you can use AddColumns and then patch to the added column as well.

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Mira Ghaly 11,415 Moderator on at

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Hi @WarrenBelz

I am not sure what do you mean by the Combobox needs to be defaulted to that value you just patched.

I am setting the defaultselecteditems to thisitem.x

The items in the dropdown are from choices column in dataverse
cwebb365 3,334 Most Valuable Professional on at

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Gotta be something up with the defaultselecteditem on the dropdown? What is it set to? Or are the drop downs blank when you click them or just the selected item clears?
WarrenBelz 156,550 Most Valuable Professional on at

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@Mira_Ghaly ,

I was suspecting an "unbound" control with no default value - that is generally the reason for this behaviour. What type of field are you patching to and what is the Items of the Combo Box and its output (ComboBox.Selected.Output). The DefaultSelectedItems (using the output) if x is a Text field would be

{Output: ThisItem.x}

It is also important that your gallery is linked directly off the list that you are patching to (not off a collection), so the source of the gallery record is updated and refreshed to show the new value.

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.

MVP (Business Applications) Visit my blog Practical Power Apps