How to Validate Power Apps Dropdown Control?

A few weeks back, I got a task to validate my Power Apps dropdown that they aren’t blank. A warning message will display if the dropdown is blank: “Please Select an Item.”

In this Power Apps tutorial, I will explain how to validate Power Apps Dropdown control using a Button. Also, we will see how to validate a Power Apps dropdown using a text label control with a simple scenario.

Validate Power Apps Dropdown Control Using Button

Now, let us validate the Power Apps dropdown control using a button control.

Example:

I have a SharePoint list named Project Tracker. This list contains the below fields.

Column Name	Data Type
Project Name	It is a default single line of text, and I renamed it “Project Name.”
Description	Multiple lines of text
Project Status	Choice

On my Power Apps screen, I have added an Edit form connected to the above SharePoint list. The form contains a Dropdown control connected to the SharePoint list choice column. The dropdown has 3 choice values:

1. Completed
2. In Progress
3. Not Started

Now, I’ll validate the Power Apps dropdown control. The Button will be visible when a user selects the dropdown value as Completed. Otherwise, the button will be in disable mode, as shown below.

To achieve it, follow the below-mentioned steps:

• Insert an Edit form -> Set its DataSource property to:

'Project Tracker'

Where,

1. ‘Project Tracker’ = SharePoint Online List

• Insert a Button control -> Set its DisplayMode property code like below:

DisplayMode = If(
    drp_ProjectStatus.Selected.Value = "Completed",
    DisplayMode.Edit,
    DisplayMode.Disabled
)

Where,

1. drp_ProjectStatus = Power Apps Dropdown Name
2. “Completed” = SharePoint Choice Field Value

• Save, Publish, and Preview the app. If a user selects the project status as “Completed,” then the button will be in enable mode, as shown below:

Validate Power Apps Dropdown Using Text Label

Now, let’s check how to validate the Power Apps dropdown using a text label control.

Example:

I have a Dropdown control and Text label control. Whenever the user doesn’t select a value from the dropdown menu, it will show me the warning message “Please Select the Manufacturer,” as shown below:

To achieve it, follow the steps below:

• On the Power Apps Screen, insert a Dropdown control -> Set its Items property as:

[
    Blank(),
    "Sony",
    "Samsung",
    "Apple",
    "Tata Motors",
    "Intel"
]

Where,

1. [Blank(), “Sony,” “Samsung,” “Apple,” “Tata Motors,” “Intel”] = Power Apps Dropdown values

• Insert a Text label control and set its Text and Visible properties as shown below.

Text = "Please Select the Manufacturer"

Visible = IsBlank(drp_Manufacturer.Selected.Value)

Where,

1. “Please Select the Manufacturer” = Power Apps text label value
2. IsBlank() = This Power Apps IsBlank() function tests for a blank value or an empty string
3. drp_Manufacturer = Power Apps dropdown value

• Save, Publish, and preview the app. If the dropdown control is empty or blank, a warning message will appear: “Please Select the Manufacturer.” Otherwise, the warning message will not appear.

This is how to validate a Power Apps dropdown control using a text label.

Moreover, you may also like some more Power Apps articles:

• Display SharePoint Person Column in Power Apps Dropdown
• Convert Text box to Dropdown in Power Apps
• Power Apps Dropdown Values Not Showing
• Set Default Value in Power Apps Dropdown Control from SharePoint list
• Sort a Power Apps Dropdown Control

I hope you found this article helpful. This article taught us how to validate a Power Apps Dropdown control using a Button and text label control.