Customizing Controls with Handlers in .NET MAUI

UI controls in .NET MAUI are rendered via handlers, lightweight classes that map properties and features to bite-sized implementations. In this video we will learn how to override the default .NET MAUI handler behavior to tweak the native controls to our liking. Spoiler alert: much easier than Xamarin.Forms Custom Renderers!

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⏱ Timestamps
00:00 - Intro
00:12 - Inspect End Result
00:31 - Implement Custom Handler for All Views
06:09 - Custom Handlers for Multiple Platforms
07:23 - Running the Sample App
07:55 - Customize Specific Control: Button
09:51 - Customize Controls Without if compiler directives
11:53 - Why (Not) Use This Method
12:25 - Customize Controls with Partial Classes
17:53 - Outro

🙋‍♂️ Also find my...

#dotnetmaui #Handlers #Customize #dotnet #dotnet6 #XamarinForms #CustomRenderer #Renderers #CustomHandler

[shahanahmed]

You’re a life saver. Whenever I think I need something, I can always count on learning it quick knowing you probably have a tutorial for it!

[latsbrah]

Awesome video, thank you! I hope we'll learn more about Shells in Maui.

[Looking_Above]

Custom Controls for MAUI Please !!! :)

[SurinderSingh-ueft]

Hi Gerald, Its an much needed video from you with clear presentation of handlers in MAUI, please go for custom controls video as well, Thanks

[Tamer_Ali]

Thanks Gerald for answering my question 👍. You're the man.

[anandshindey]

I like Method 3. Awesome video . Keep them rolling. Thanks.

[jean-baptistedioli]

Thanks for the awesome video!
I'm also interested in creating our own control, for example to create a new button style from scratch. :)

[AlvaroRivoir]

Having a video explaining how to create custom controls would be great

[abdulkabir_]

Awesome video as always, can you make another video related to custom Button in tabbedpage ?

[ermanomartins]

Great video and of course i get more videos about custom handlers !
Thank you !

[metacapitalism]

I quickly tried all three methods in a new project except I used the Entry control and removed the underline. All three methods worked fine. The sample code is under robreno forward slash CustomControlHandlerDemo. I found the 3rd method very nice, but am left with a question. It works, but is this not the recommended way any longer or are there issues to be concerned about? Thanks for this video, Gerald.

[Guru]

Thanks for the video,
How to handle Xamarin.Forms Dependency service & Effects in MAUI

[stefanhodges-kluck]

Thanks for these videos! I am trying to implement this, and as of Version 17.0.0 Preview 7.0 of VS 2022, getting a message that "ButtonMapper does not exist on property ButtonHandler." "ElementHandler" property does exist, but that gives error, "Cannot apply indexing with [] to an expression of type 'IPropertyMapper<IElement, IElementHandler>'."

[ankits]

Hi, I want to creat custom datagridListview handler to handle scrollchange event. Do you have any idea how to do that? Please help

[BelgianDaSeeD]

Thank you for this great video. Do you plan to do one on the MVU pattern in MAUI ? And/Or the declarative way to write UI with C#forMarkup or Comet ?
I am currently a .NET developer but more backend. In my free time I use Flutter to develop some mobile app for personal use and I really like their approach but as it seems that it exists kind of a same way to do it with .NET, I am considering the possibility to use MAUI for my next apps. Of course I can do it in MVVM but I find MVU more interesting for my little apps.

Anyway, keep up the good work, you're doing it great !

[deniszhukovsky]

To be honest I didn't get why the button's background been updated? It seems Gerald has overwritten "MyCustomization" property. Why is this delegate been called. Do we have MyCustomization bindable property somewhere?

[UzairAli]

Indeed Handlers are far better than Renderers, time to upgrade all of my renderers to handlers :)

[Tamer_Ali]

Gerald, I hope you talk about how to make the design responsive for mobile and tablet in Xamarin Forms.

[antonnasonov]

Hi, Gerald! I've just found your videos and they are amazing!
Could you please make a video about how to transform classic Xamarin.Forms custom render to .Net MAUI handler?
If I have a bunch of custom renderers in my app, how should I remake them to handlers?
Thanks in advance!

[hosseinaftabi]

Great. It was so cool, I try to learn Xamarin one month ago, as you describe about MAUI its better to start learning MAUI not xamarin form in old way?
and, Is that a good way to start new App with MAUI or i must wait for release final version?