Following article explains the difference between Combo box and Dropdown in Power Apps.
Have you ever added a Dropdown in Power Apps and later realized you needed Search, Multi-Select, or Custom Values?
It happens to almost everyone.
That’s when you discover the Combo Box control.
This difference between combo-box and drop down in power apps is a very common Power Apps interview question
Let’s understand it in a simple way.
Difference between Combo Box and Dropdown in Power apps — Quick Summary
| Feature | Combo Box | Dropdown |
| Select multiple items | ✅ Yes | ❌ No |
| Search items | ✅ Yes | ❌ No |
| Show multiple columns (Name + Title, etc.) | ✅ Yes | ❌ No |
| Allow user to enter custom values | ✅ Yes | ❌ No |
| Works with complex data (Dataverse lookup) | ✅ Yes | ✅ But limited |
| Can behave like dropdown (if multi-select off) | ✅ Yes | ❌ Reverse not possible |
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Following are the key differences
1️⃣ Multi-Select Support
- Combo Box → Select more than one item
- Dropdown → Only one item at a time
2️⃣ Search Option
- Combo Box → type to find results
- Dropdown → scroll only
3️⃣ Showing Existing Selected Record
- Combo Box needs DefaultSelectedItems property:
DefaultSelectedItems = Filter(Employees, ID in SelectedEmployeeIDs)
- Dropdown uses simple Default property:
Default = "Rahul"
4️⃣ Custom Values
- Combo Box → Users can type their own value
- Dropdown → No custom input allowed
5️⃣ Multiple Columns Display
- Combo box offers Layout (Single/Double Column)
- Dropdown = only one column
If asked in interview
“A Combo Box supports multi-select, searching, custom values, and displaying multiple columns.
A Dropdown only supports single selection and no search.
A Combo Box can act like a dropdown (if search + multi-select are disabled), but not the opposite.”
When to use what
This table explains where to use combo box and where to use dropdown.
| Use Combo Box when | Use Dropdown when |
| You need user search | Very small list |
| You need multiple selections | Single selection only |
| Data is coming from Dataverse lookup | Static list values |
| Users need to add custom data | No custom entry required |
Here is the summary for this :
| Combo Box | Dropdown |
| More powerful | Simpler |
| Best for connected data | Best for small/limited data |
| Multi-select | Single-select |
| Search & Custom values | Not supported |
Recommendation:
If unsure, start with a Combo Box → you can always disable advanced features.
Frequently Asked Questions (FAQs)
Q1: Which control is best for Dataverse lookup fields?
Combo Box
Q2: Can a Dropdown be converted to Combo Box features?
No — But Combo Box can behave like a dropdown.
Q3: Can Combo Box show 2 fields (like Name + Role)?
Yes using Layout → Double
Q4: Which is asked more in interviews?
Combo Box — because it involves real business scenarios.
You can learn more about combo box control from microsoft documentation website.
Next: What is the difference between Concatenate and Concat in Power Apps?
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