Validate Inputs, Warn Users, and Disable Buttons in Power Apps

Learn how to create effective user experiences in Power Apps by validating input fields, displaying warning messages, and controlling button states. In this comprehensive tutorial, we will demonstrate various techniques for managing user interactions in your Power Apps Canvas App. Whether you are a beginner or an experienced Power Apps developer, this video will help you enhance the functionality and usability of your app. Don't forget to like, comment, and subscribe for more Power Apps tutorials!

Chapters:
0:00 - Introduction
0:48 - Demo of the solution
2:05 - Understanding IsBlank vs. IsEmpty for input validation
3:42 - Controlling button state with DisplayMode property
5:11 - Indicating required fields with an asterisk (*)
5:45 - Why hiding buttons is not recommended
6:55 - Using IsMatch for pattern validation
9:02 - Displaying warning messages when inputs don't match
11:03 - Implementing DelayOutput for improved user experience
12:18 - Validating Dropdown controls
13:50 - Using OnChange event for real-time validation
16:54 - Applying complex logic to control button state
18:59 - Fail Fast: The importance of timely feedback in validation

#PowerApps #CanvasApp #InputValidation #ButtonControl #UserExperience #PowerAppsTutorial

[dougydoe]

The timing is just impeccable. Right in the middle of a project and this has given me more ideas for validating input fields. Yes, the IsMatch video is needed, Shane... Thank you

[chrisundery]

Great as ever Shane. Literally had an accidental entry the other day as the user missed a field that should be set to mandatory. Can now easily fix. Keep them coming.

[TracyOsimowicz]

I would love an IsMatch video (and especially if it includes a very quick tutorial on regex expression syntax?) Appreciate all your work!

[jonathangagnon]

The timing on this is great! I'm trying to control data being put into a PowerApp and visualizing it in PowerBI...well timed. And your answers are more useful than ChatGPT (Yup, I used it as an aide) And yes, please, an in-depth isMatch video would be appreciated.

[oluwatobipaul]

Thank you Shane. This really refreshed my memory on data validation

[manojroy]

Really, helpful video to understand the basics of controls and work to it, this would also help the freshers to understand the properties of the controls and how to implement it.

[frenamakenson]

hey Shane Thanks for sharing those Tips... very Usefull to make better UX

[franknielsen]

IsMatch video - YES. And thx for another great video Shane :)

[GreyDob]

Another great video Shane, I just noticed you used AND and OR functions, didn't know that was working, I was still using the && and || 🙂

[jdwillingham]

Hey Shane. Thanks for all of the fantastic instructional videos. I am trying to use a dropdown field to enable another field to become editable in a form. I was trying to use this video to assist me. Essentially, I want the dropdown to be used to ask a question “Change to Title or Description?” With the options being “Yes or No” and based off that answer it will allow those fields “Title” and “Description” to become editable fields on the form instead of being greyed out and viewable if the answer is “yes”. Any assistance you could provide will be greatly appreciated.

[ophemtech]

I must confess that this is really an angel coming to my aid cuz i just hitted this validation problem. though if i had continued with using my head and tweaking things, i couldve gotten it but maybe not as better as you taught it here.

but i really do have a problem, i seem to not be able to create a dataverse or sharepoint, and i still dont know why i can't create that, is it that i dont have access to do so or what do you think could be the problem. but anyways, thank you for these tutorials, its life saving

[RoyAliKhairan]

Nice video as always--i always smile every time you correct your own words. Anyway, it seems i need your assistance here! I want to build an app to take care of the exit clearance process in my office. I do watch a lot of videos on how to build an app using this PowerApps but I still couldn't figure out how to make this exit clearance into the app. Any advice from you would be very much appreciated. Cheers!

[semajnitram]

an ismatch video would be great (unless you've already done it, in which case thank you!)

[dvk]

Thank you Shane (one more time!!). I owe you the beer!!

[juliennunes]

Great video! Though since the lblWarnEmail only shows up when the email is invalid and not blank, if the email is blank the user could actually click on the button
Thats a demonstration so no one cares but it might surprises some people that copied pasted haha

[lwhite]

Great stuff! I use form.valid to set display mode for buttons. Does form.valid pick up IsMatch errors? Or do I need to add that to the button's display mode property? Not sure this makes sense to anyone but me.

[angelmingkem]

Hello from Indonesia... Really helpful video for me :) just learning the powerapp.
Question, is it possible to record the data to Excel or Sharepoint?

[anthonyapodaca]

Yes! IsMatch with custom regex... maybe some help from AI friends

[espiemar]

How do I find a required field that is not allowing the submission of my forms? I have combed each field, I have sorted my fields with tabs and they are only required when they are visible

[zekeskinner]

Hey Shane, How would I disable a button with a form field instead of a table field. I am using powerapps to automate an application into a sharepoint list and I need to make it to where the data field that is required will not allow me to continue in my application without filling out that portion. I have tried the IsBlank and IsEmpty but neither are working.