Behavior & BindableProperty in Xamarin.Forms

Learn how to add Behaviors and BindableProperty to MVVM apps in order to extend XAML syntax and bind Commands to user controls that does not support binding commands like ListView.

[@AdityaWibisana]

Perfect!!! Extremely helpfull. Thanks man!!!

[@dinobulja]

Nice explanation, thank you

[@redarismail5777]

Dear Houusem, Thank you so much for your valuable videos. Could you please post a video or give some advice about showing detail page of a list view using MVVM.

[@CelioMotta]

Perfect! Thank you!

[@mikerodriguez1971]

What plugin are you using to get the class and member usage status? "0 references | Houssem Dellai, 1 hour ago | 1 author, 1 change"

[@maceloo]

helpfull a lot! Thanks!

[@bharathib6475]

Hi, your videos are helping me alot from when I started as learning xamarin form.so 1st I would like to thank you for Posting such a good videos.and can you please make a video for obfuscation for protect xamarin apps with confuserex(open source).

[@ifrit1537]

Thank you. It is the same method for ItemAppearing?, I have a week since I started learning Xamarin and I am using MVVM too. I need to implement a infinite scroll listView. I guess ItemAppearing is used to get that(infinite scroll listView). If I need to implement this, Do I just need to create the method to call the client service to some API, and the rest is the same? (Sorry, I am learning English too)

[@redarismail5777]

I use the same approach, but know I am having a problem with deselection of the listView item. Could you please leave a feedback about Deselection of listview model. Thanks.

[@theafricanwalkchannel4302]

Sir please I know this is not related but I want to bind two stacklayout from two different pages together ,for examples I had a stack of images and want it to appear on another page after I click done, I used parameter and it went to the other page but when I want to edit and I come back the stack of images is not on the first page anymore because I used parameter , so I want to find a way to bind them instead of using parameters so that when I come back to the first page the stack of images will still be there thank you.

[@kiranwilson7527]

Hi, well explained. Thank you. I tried to work in the same way. But I am stuck with error "No property, BindableProperty, or event found for "Command", or mismatching type between value and property." Can you please help me to rectify this.

[@leelapk2669]

Are you demoing on MAC using parallels or Bootcamp. It was smooth :)

[@HoussemDellai]

using free VirtualBox :)

[@leelapk2669]

Thanks. I am on a Macbook Pro late 2015 16GB model with SSD speeds of 1500 Read and 1600 write. Will try out Virtualbox. What 's you configuration btw.

[@leelapk2669]

What are you VirtualBox settings RAM ?

[@HoussemDellai]

@@leelapk2669 6 GB but 4 is also enough

[@pkarsten77]

This Works Fine, but i have one Problem, after Select one item from the ListView Item, i cannot select this item again, i must first select other, and then the first again. Background is i select item, it cames a dialog, would you edit his? yes /no, if i click no, then i would select the item again, but nothing happens, i try set Selectproduct = null after select it, but has no effect. Any ideas? Thanks

[@antheliotech6822]

if possible please do a video on user control, how to create and re use in entire application.

[@FollyOx]

This should be built into Xamarin. How would you pass a command parameter aswell ?, maybe you could do a video on the next step.

[@tidehtee-day2909]

Do I need to install any packages for this

[@redarismail5777]

Guys Any one has the same example plus detailed page of each item list Thanks

[@anilpaul7373]

Hi sir... could you please tell me how to call web service

[@sujeetkumaryadav9600]

Please Describe how to work with gorilla player in xamarin ???

[@HoussemDellai]

Sujeet Kumar Yadav Gorilla is now dead since we ha Xamarin Previewer.

[@sujeetkumaryadav9600]

I have another proble with visual studio.
My xamarin toolbox is disable.so i can't use that control.

[@HoussemDellai]

Sujeet Kumar Yadav you get it via Views -> Other Windows -> Forms Previewer

[@yairtorkeltaub7619]

excellent way except it is not attached bindable property it's bindable property

[@maximus_infinitus]

Wow! All that to add a Command? Why not just add an ItemSelectedCommand property? I really can't understand Xamarin team. First you say that using the code behind is not "good", then why the hell is it there? Why just don't remove it and use the mvvm pattern as default? Mvvm is nice, but needing this kind of workaround to do such a simple thing just doesn't make sense. Make up your minds and make a good platform that don't need workarounds like this. Instead of a couple of lines in the code behind you created a ton of code to do just the same and you really think the code behind solution is not an elegant code? Come on! The less coding the more elegant it is. Xamarin dev team really needs to learn from Adobe/Apache Flex platform.

[@AimanSalamah]

If you planning to make reusable code and classes also if you are going to add unit test for your code then you need to use MVVM

[@HoussemDellai]

You can reuse the behavior again and again and you can make it as Nuget package so you you don't have to write the bahavior in each project.

[@FollyOx]

Xamarin, ironically doesn't have enough developers actively working on it, they are stretched too thin as such basic features are STILL missing

[@solvedplus858]

sound is too bad to me