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Triggering a Flow each time a form is loaded (IsNew)

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Posted on by Community Power Pla... Microsoft Employee

Hi again powerusers!

I have a simple form for registering incoming and outgoing post. Each registration needs a unique ID based on YYYY.<random number> which I set using a variable which is set by calling a Flow.

I thought to be smart and set the variable upon loading the App, but as it seems this variable is not refreshed whenever you click on the "New" button again. Meaning all new list items get the same unique id as the first generated in this "session". Working with a button to calculate a new ID works just fine.

How can I trigger the flow each time the form is loaded in New mode?

Thanks!

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WarrenBelz 154,943 Most Valuable Professional on at

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Hi @Anonymous ,

On your New button set a Variable

Set(varNew:true)

On the OnSuccess of the New Form

If( varNew, YourFlowName.Run( . . . . ) )

Also ensure if you have a cancel button from the New Form

Set(varNew:false)

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Community Power Pla... Microsoft Employee on at

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Hi @WarrenBelz

This would only trigger the flow to set the variable on pressing Save - correct?

My users need to see the variable value before pressing Save. Once they then click on "new" again, the variable has to be reset (meaning: the flow has to be run again) so it gets a new number.

Thanks,

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WarrenBelz 154,943 Most Valuable Professional on at

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Hi @Anonymous ,

I cannot see your model, but as you realise, a Flow has to be triggered by something done by the User. They will "see" the Variable as it is initiated on the New function, but you need to consider where to trigger the Flow if you do not want it OnSuccess.

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Community Power Pla... Microsoft Employee on at

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Hi @WarrenBelz

Thanks.

So just to be clear, there is no way in PowerApps to trigger the flow each time the form is loaded, without having to refresh the page?

Thanks,

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WarrenBelz 154,943 Most Valuable Professional on at

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@Anonymous ,

What are you using to trigger the loading of the form? You could run the Flow from there, although to answer your specific question, a Form has no actual OnLoad event

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v-jefferni Microsoft Employee on at

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Hi @Anonymous ,

You can trigger a flow in the App wherever there is a On... property, OnSelect of buttons, OnVisible of Screens, OnStart of App, OnSave of forms, and so on. So, when or where you want to trigger the flow to get the flow returned value, set the variable with triggering the flow, use the variable value. From your end for example, set OnSelect of an add button or icon to navigate to new item screen or NewForm an Edit form, then use the variable as the Default of a Text Input box within the form.

Best regards,

Community Support Team _ Jeffer Ni
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hemrhk 361 on at

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@Anonymous

You can trigger the flow on Screen "OnVisible" property

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