Using the Power Apps Switch Function

In this tutorial, you’ll learn how to work with the Power Apps Switch function. This function is useful for evaluating a single formula against multiple possible values and executing corresponding actions.

Syntax Overview

The basic syntax of the Switch function is:

Switch(
  Formula,
  Match1, Result1,
  Match2, Result2,
  ...
)
  

It compares the result of the formula with each match value. If a match is found, the corresponding result is returned or executed.

Example: Displaying City Images

Let’s build a simple app that displays an image based on the selected city from a dropdown menu.

1. Add a Dropdown control and set its Items property to:
   [“Please select a city”, “New York City”, “Houston”, “Atlanta”, “San Diego”, “Miami”]
   
2. Add an Image control and set its Image property using the Switch function:
   Switch( Dropdown1.Selected.Value,
   “New York City”, “https://example.com/nyc.jpg”,
   “Houston”, “https://example.com/houston.jpg”,
   “Atlanta”, “https://example.com/atlanta.jpg”,
   “San Diego”, “https://example.com/sandiego.jpg”,
   “Miami”, “https://example.com/miami.jpg” )

Now, when a city is selected, the corresponding image will be displayed.

Conditional Logic with Nested Functions

You can nest other functions inside Switch. For example, use a Radio control to toggle between day and night images for Miami:

1. Add a Radio control with Items set to: [“Day”, “Night”]
   
2. Update the Miami case in the Switch function:
   Switch( Dropdown1.Selected.Value,
   “New York City”, “url/nyc.jpg”,
   “Houston”, “url/houston.jpg”,
   “Atlanta”, “url/atlanta.jpg”,
   “San Diego”, “url/sandiego.jpg”,
   “Miami”,
   If(RadioTime.Selected.Value = “Day”, url/miami_day.jpg”, “url/miami_night.jpg”
   )
   )
   

This allows dynamic image switching based on both city and time of day.

Navigation Example

You can also use Switch to navigate to different screens based on the selected city:

1. Add a Button and set its OnSelect property:
   Switch( Dropdown1.Selected.Value,
   “New York City”, Navigate(NewYorkCityScreen),
   “Houston”, Navigate(HoustonScreen),
   “Atlanta”, Navigate(AtlantaScreen),
   “San Diego”, Navigate(SanDiegoScreen),
   “Miami”, Navigate(MiamiScreen) )

Clicking the button will take the user to the appropriate city screen.

When to Use Switch vs. If

• Use Switch when testing one variable against multiple known values.
• Use If when testing multiple variables or complex conditions.

Conclusion

The Switch function is a powerful and cleaner alternative to multiple If statements when dealing with a single variable and known values. It enhances readability and simplifies logic in Power Apps.