How do I update a variable when UpdateContext is triggered?

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Posted on by Future_Vision

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Here is what I have.

When a user chooses ** Add 3rd Party ** from the 3rd Party combobox the "Add 3rd Party" text field appears. When they click the "Add" button the following executes: (NOTE: DefaultSelectedItems is set too newThird)

If(!IsBlank('Add 3rd Party TB'.Value),UpdateContext({newThird:Patch('Third Parties', {'Third Party (cr9c7_thirdparty)':'Add 3rd Party TB'.Value})});Reset('Add 3rd Party TB'))

This works great but I have found a problem I am trying to solve. Instead of referencing the value of the combobox for later use as below

'3rd Party CB'.Selected.'Third Party (cr9c7_thirdparty)'

I decided to assign the value of the combobox to a variable at OnChange like this for easier reference.

Set(source3rd,'3rd Party CB'.Selected.'Third Party (cr9c7_thirdparty)')

This works great IF I am changing the value manually. When the combobox value is updated with UpdateContext then the OnChange function is not triggered. Is there a way to make this work or perhaps my whole approach needs a rework.

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Building Power Apps

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Drrickryp Super User 2024 Season 1 on at

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Hi @Future_Vision

If I understand it right, https://powerusers.microsoft.com/t5/Building-Power-Apps/Trigger-a-dropdown-OnChange-from-a-button/m-p/632168#M200421 may be the solution to your question. Basically store the action in the button and have the OnChange select the button.

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Future_Vision 634 on at

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Hmmm. Not completely sure I understand. I got this to work but there may be a better way.

DefaultSelectedItem is set to newThird. This allows the combobox to choose the value I entered in the "Add 3rd Party" textbox when it refreshes after the Patch.
I left the OnChange property of the 3rd Party combobox set to update source3rd when a change is made unless it is the "** Add 3rd Party **" option
On the button. I set source3rd to the value of the Add 3rd Party textbox.
This allows a value to be written to source3rd when the dropdown is selected and then overwritten if a new value is added. Again, not sure this is the most efficient way to do this though. Perhaps @Drrickryp 's solution is better. I'm just unsure how to implement that.

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