Power Platform Community Forum Thread Details

I have a powerapp Send Email button which should disable once its clicked once. Next time if user access the app, button should be disabled as its clicked once already.

I wrote below code

Send Email OnSelect

Set(SendEmailClicked,true);

Send Email Display Mode

If(SendEmailClicked,DisplayMode.Disabled,DisplayMode.Edit)

The Send Email button gets disabled once its clicked. However if i refresh the app, button gets again into Edit Mode. May i know how to avoid this?

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General Questions

All variables and collections are cleared when an app is refreshed. If you need data to be stored persistently across different sessions, you'll have to use a permanent data source like SharePoint, SQL, Dataverse, etc. There are several ways to set this up, and I'll provide a simple example using Sharepoint.

1. Begin by creating a SharePoint list named "Email Log." While you only need one column, you can add more if necessary. In this example, we will use the Title field to store the email addresses of the individuals clicking the button.

2. Connect the newly created SharePoint list as a data source, and in the App > OnStart event, add the following formula:

ClearCollect(colSentEmail, Filter('Email Log', Title = User().Email))

3. Then, on your Send Email Button, OnSelect property, add the following code after your send email event:

Patch('Email Log', Defaults('Email Log'), {Title: User().Email});
ClearCollect(colSentEmail, Filter('Email Log', Title = User().Email))

4. Finally, on the DisplayMode property of your send email button add this formula:

If(CountRows(colSentEmail) = 0, DisplayMode.Edit, DisplayMode.Disabled)

When a user clicks the "Send Email" button once, it is logged in the SharePoint list. The app checks this list for the log entry each time the app is launched to determine if the logged-in user has clicked the button before.