Introducing the .NET Community Toolkit - MVVM, Performance, Diagnostics, & More

[@JoseSilva-gt6zj]

Thank you, James and Sergio! I'm so happy to see videos about the news of MVVM! I've watched your MVVM video on your channel and I'm here to delight it in another flavor! Thank you! Keep going! 👏

[@Mike-eq3lz]

An excellent toolkit, observable collections and derivatives are super useful. Great messaging between View Models as well. I use to use Caliban Micro. This toolkit is a great modern replacement.

[@dotnetdevni]

Maui feels like its some kind of which craft amazing seeing all the platforms from web desktop and phone finally meld all together.

[@dotnetdevni]

Amazing xamrain was always do your own validation approach this be great if this goes across all four platforms.

[@enzodiaz3921]

Nice interview. Thanks both!

[@isax55]

Te code generator is really cool, observables and commands auto-generated is really making mvvm easier to implement

[@Tronex2009]

Just rolled back from MCT to MvvmHelpers, since MCT does not reflect RC1 breaking changes yet. I am watching their repo closely and can’t wait to switch back to the Toolkit, because it’s amazing!

[@Sergio0694]

We just released the Preview 3 of the MVVM Toolkit, give it a try! I've written a blog post about it with more info, you can find it here: devblogs.microsoft.com/ifdef-windows/announcing-net-community-toolkit-v8-0-0-preview-3/

[@fieryscorpion]

Wow this is AMAZING!

[@S3Kglitches]

That MVVM community toolkit stuff is best. Is it the same what you are showing in your MAUI tutorials, James? I've seen ObservableObject there as well and some very simplified and nicely-looking ViewModels!

[@LordErnie]

Great video, but I do have some technical questions. I am still a student and I'm trying to get the hang of 'new' techniques like span, and buffers. What are they? What do they do? How do I use them. I hear that they are now an industry standard, but it's hard to keep up for someone who want's to learn. Does anyone have any good pointers? Does James have a video on it perhaps?

[@Sergio0694]

I'd recommend reading through the official docs for both the C# language and the various APIs. For instance, you can see docs about the Span type docs.microsoft.com/en-us/dotnet/api/system.span-1 and docs.microsoft.com/en-us/archive/msdn-magazine/2018/january/csharp-all-about-span-exploring-a-new-net-mainstay. Generally speaking, a span is a type that abstracts over sequences of values (it's essentially a pair of a managed pointer and a length). So, one of the things a span can do is to map over an array, or a slice of an array. The point of the span type is that you don't have to worry/care about where items are. You just know you have a given slice of items you can work on. They could be from an array, from a local buffer, from native memory, who knows, and who cares 😄

[@sman6320]

If I use the attribute [RelayCommand]: how can I get the info about the sender? E.g. which entry control was changed.

[@psychotrout]

This is really great!

[@sangachidam3219]

Great video thanks. Does all these feature work for mobile app ? Or is this just for windows store app?

[@LosWochos76]

Can you please make a video on how to use validation by using the ObservableValidator in combination with xaml and reflecting errors. I couldnt get it to work...

[@DonaldFranciszekTusk]

Can You please explain me why to use Commands in my private project if I can use Events?

[@dasfahrer8187]

When is WPF navigation coming for the MVVM Toolkit?

[@mohammedsadiq6953]

Can you run prism and the this toolkit at the same time ?

[@neralem]

What if you are doing the "traditional" mvvm stuff where you separate ViewModels and Models? Sometimes I want to inject a model that just holds the data into the corresponding viewmodel to display and modify it. How do I do that?

[@rarepanda3766]

Awesome. Is there any example targeting all platforms with this toolkit. aswell? Like Web & iOS & Android & Windows & Linux ?

[@Sergio0694]

Hey there! We have a Sample App currently targeting UWP and Xamarin.Forms, but we're looking into adding more targets in the future 😄 github.com/CommunityToolkit/MVVM-Samples

[@NehaSingh-fe7nu]

Awesome!

[@TheRealMrp]

From the looks of it, this is not supported for a UWP application?

[@bernpaul9868]

why people said mvvm is not secure? and they said ruby is one of the top secure ?

[@tea_otomo]

I really like to use it, why does it not support .NET 6 though (according to NuGet)?

[@Sergio0694]

It does! All packags in the .NET Community Toolkit multi-target both .NET Standard 2.0 .NET 6, so you can use them everywhere 😄

[@FANTICOUS32]

Is it compatible with .Net Framework 4.8 ?

[@Otonium]

Thanks, where's that nice sample app?

[@IdontlikeyouGoogle]

I cannot use this since this only works on W11 and I'm stuck with W10 and cannot update

[@S3Kglitches]

MVVM toolkit Messenger - sending messages - why not use C# events? They do broadcasting

[@ericblankenburg]

Love it

[@as2droid]

No Codelense reference count for [ObservableProperty] ! I cant believe I fell into this trap :(

[@this-is-bioman]

The sound quality is below any decency

[@S3Kglitches]

That Guard thing looks just like stuff which has been available in Java Unit tests for years.

[@terry_hutt]

I wish this worked for .Net Framework. Coding in VB (sorry) the first [ObservableProperty] works but none of the others seem to generate their properties

[@robertodalmonte504]

The Toolkit is Supercalifragilisticexpialidocious! I was wondering if there's a way to localize the error message from a Resource.resx file Something like: [ObservableProperty] [Required] [MinLength(2, ErrorMessage = Resources.givenName)] [MaxLength(40)] private string _givenName = string.Empty;

[@Sergio0694]

There's no built-in support for localization, but that's outside the scope of the MVVM Toolkit. You could implement your own localization logic for validation in several different ways, eg. by writing your own validation attributes with additional localization logic for generating error messages.

[@robertodalmonte504]

@@Sergio0694 Thanks Sergio, is there a sample on how to do that anywhere, con you point me in the right direction?

[@namelastname4077]

please do an update