The Refresh function in Power Apps is used to refresh a data source. This function is particularly useful when you need to ensure that the data displayed in your app is up-to-date by reloading the latest data from the data source.
PowerApps – Refresh() function Syntax
- DataSource: The data source that you want to refresh.
Notes:
- Performance Considerations: Use the Refresh function sensibly to avoid unnecessary data loading, which can impact app performance, especially with large datasets.
- Conditional Refresh: Combine the Refresh function with conditional logic to refresh data sources only when certain conditions are met.
- Feedback to Users: Provide visual feedback to users, such as loading indicators, when refreshing data to enhance the user experience.
- Data Consistency: Ensure that the data displayed in your app is always up-to-date by refreshing data sources as needed.
PowerApps – Manually refresh data source
Suppose you have a data source named Employees and you want to refresh it when a button is clicked.
- Add a Button Control:
- Insert a Button control.
- Set the Text property of the Button to "Refresh Employees".
- Set the OnSelect property of the Button to:
When the button is clicked, the Employees data source will be refreshed, pulling in the latest data.
PowerApps - Refresh Multiple Data Sources
Suppose you have multiple data sources, Employees and Departments, and you want to refresh both with a single button click.
- Add a Button Control:
- Insert a Button control.
- Set the Text property of the Button to "Refresh All Data".
- Set the OnSelect property of the Button to:
Refresh(Employees);
Refresh(Departments)
When the button is clicked, both the Employees and Departments data sources will be refreshed.
PowerApps - Refresh data source on Screen Load
Suppose you want to automatically refresh a data source whenever a specific screen is loaded.
- Add a Screen:
- Insert a new screen named EmployeeScreen.
- Set the OnVisible Property of the Screen:
- Select the screen.
- Set the OnVisible property of the screen to:
Whenever EmployeeScreen becomes visible, the Employees data source will be refreshed automatically.
Suppose you have a form for adding new employees, and you want to refresh the Employees data source after the form is submitted to display the newly added employee.
- Add a Form Control:
- Insert a form control named EmployeeForm.
- Set the DataSource property of the form to Employees.
- Add a Button Control to Submit the Form:
- Insert a Button control named SubmitButton.
- Set the Text property of the Button to "Submit".
- Set the OnSelect property of the Button to:
SubmitForm(EmployeeForm);
Refresh(Employees)
When the button is clicked, the form will be submitted, and the Employees data source will be refreshed to include the newly added employee.