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Google AngularJS Framework - Worth the risk?

I have been asked to build a small web application for one of our clients and think it might be a good opportunity to try out a different framework for building web applications. Most of the applications we build are based on asp.net web forms and we have no yet done anything in an MVC architecture but I am eager to start building web applications in a more structured manner with the right tools.
I have been researching things like asp.net MVC and the likes which look quite good but I am wondering is there anything to be said for using something like the Google AngularJS Framework.
If possible I would still like to be able to write my server side code using c# and I have not researched AngularJS enough to know if this is even possible, although I assume I could use web services.
Has anyone had any experience with developing an app using AngularJS and if so, how was it and can you point me in the right direction for some tutorials?

We have been developing a port of a Swing fat-client application in AngularJS for the last couple of months and I think it is worth recommending. As far as learning resources go, check out the official project site (and be sure to read the tutorial) and the mailing list (the authors are very helpful).
The good stuff:
great testability
the two-way data binding is a very powerful feature, and it can be extremely helpful once you "get it"
IMO the AngularJS templates are much less brittle than using data- attributes or "special" CSS classes to mark elements that do something
it greatly reduces the need for using jquery plugins, because implementing that functionality in AngularJS is very easy (stuff like trees, tabs, accordions, etc.)
The bad stuff:
the learning curve seems pretty steep (I didn't have much of a problem, but I've seen some people struggle with it)
validations in AngularJS suck for the time being (a new implementation is on the way)
not all libraries/jquery plugins play nicely with Angular and usually you have to wrap them
the API is still being polished, so expect breaking changes (not a big problem with frequent releases and very good changelog, though)
performance is OK up until several thousand bindings on a page - most of the time this is not a limitation, but there are cases when this could be a problem.
Some pointers (if you ever decide to learn AngularJS):
some people really overuse widgets. In my experience, it's much better to use HTML "partials" + services, and only use widgets sporadically.
read source code of the library - it's the best place to learn stuff about angular
no DOM manipulation in services/controllers
if you use css classes to bind to events, you are doing it wrong

+1 #psycho's answer
AngularJS is client-side framework, so you can use any language on the server. It's designed to work well together with jQuery, with big emphasis on testing...
Here are some resources you might find useful:
TUTORIAL: http://docs.angularjs.org/#!/tutorial
API DOCS: http://docs.angularjs.org/#!/api
Developer Guide: http://docs.angularjs.org/#!/guide
Some example apps:
http://cburgdorf.github.com/angular-todo-app
http://www.fluid.ie/angular/calculate/
http://hookercookerman.github.com/angularjs-todos/
http://paul-hammant.github.com/StoryNavigator/navigator.html
Adapter for SenchaTouch: https://github.com/tigbro/sencha-touch-angular-adapter
Adapter for jQ Mobile: https://github.com/tigbro/jquery-mobile-angular-adapter
Feel free to ask any question on mailing list !
We are still in beta, but there are already several internal apps at Google, powered by AngularJS.
UPDATE (26th July 2012):
AngularJS v1.0 has been released.
For some public AngularJS-powered apps, check out http://builtwith.angularjs.org

IMHO developing something for a client which they may have difficulty supporting is unprofessional. You have to bear in mind that it will be difficult for your client to hire experienced Angular professionals, or train their own people to climb that "steep learning curve". Also, so far the documentation is not that great. Can you easily, in a few moments, answer the question, "How can I connect my shiny Angular app to my client's database?" Can your client sometime in the future easily grab some existing code and adapt it to their potential future needs? Be honest.
Compare plain old reliable LAMP development to Angular. For a "small web application" I really believe that a professional should give his client something maintainable and simple.
It's not to say that Angular isn't cool and sexy etc etc. But you have your client's future maintainability to think about in addition to the latest framework fad. Tread lightly would be my recommendation. Build your own website with Angular first and see what you think before you bestow your fabulous new skills on some trusting client.

I remember reading this SO thread couple of months back with same question in my mind, and we decided to go ahead with AngularJS, and the best decision we made on this project yet.
We are using AngularJS + ASP.NET MVC4 REST WebAPI.
Most probalbly after such a nice client side Javascript MVC framework, you would only need REST API layer interacting with Business Logic Layer at server side, and no MVC at server Side (ASP.NET MVC/Spring/Structs would feel like old memories).
You will find Angular-UI good add-on (esp ng-grid)
Soon after our project finishes, we might put some of our directive we wrote for open source world.

I have been researching the merits of AngularJS for many months to utilize as a core framework for product I am creating.
There are many aspects of AJS that make it worth while to learn. Yes there is a bit of a learning curve but its well worth it, especially if you wish to have more control on client side capability.
JQuery manipulates the DOM at run time, whereas AJS situates itself within the JS rendering lifecycle. This allows you to teach the DOM new tricks by creating your HTML Elements and Attributes. This is very, very powerful. As what you are able to do is introduce new Element behaviors for whatever your purpose and need. In AJS these custom HTML Attributes/Elements are called Directives. With the ability to craft your own Directives, you are able to build functionality that the current HTML doesn't have, pushing out capabilities that will run on all modern browsers now and into the future. Of the many approaches to inducing new behavior, AJS appears to be the safest direction one could take due to how they have chosen to implement it.
There is a huge performance gain over JQuery in AJS.
I love the simplicity of the two-way data binding, and the separation of concerns in their client side MVC pattern, which as pointed out above provide great testability. There scope object is the glue between the View (HTML), the Model (your Data) and your custom Controllers. The scope provides access to parent attributes and can be isolated at the sibling level, which is important for some reusable templates.
Templates can created and reused across your application which can contain 0 or more custom directives.
I have been using frameworks such as PRISM and MEF but I am finding that AJS has most of the same features that exist in these .NET frameworks but in a 29K footprint. There is rumors that they are working on lazy-loading which if provided will provide for some very interesting LOB type capabilities.
There are a number of UI frameworks that are being built for AJS but you can wrap any 3rd party control lib as needed, given a bit of effort. The trick is to ensure that when these 3rd party controls have changes induced, that you ensure AJS is properly notified using their apply method.
If you combine AJS with MS TypeScript within VS 2012, it provides the ability to manage and build some very impressive projects which will work well for those who are more comfortable with projects within VS.
There are a ton of other reasons to look at AJS, but if you are considering frameworks such as KnockOut I'd highly recommend AJS instead, regardless of it's perceived learning curve. Knockout is a library, AJS is a framework.

So far i think Google's Angular is great. Particular like the databinding and dependency injection.
For other js framework, there are knockout.js , backbone.js etc.
here are some posts:
angular.js example in backbone.js and/or knockout.js

I realise this post is old and you haven't gone with Angular, but I have a similar background to you, and I'm at the same point as you when asking the question.
So for the benefit of future visitors, some of the "risks" and links to resources I've found useful...
As many have already mentioned, Angular can have a very steep learning curve "Not only me, but co-workers that I consider highly smart developers, have struggled with some of the basic concepts" AngularJS is amazing... and hard as hell (link also has some good tutorial links which you asked for), and the version 2 stuff is looking more like java, which wouldn't have been a problem with your C# background, in my opinion Directives are hard enough to understand without verbose annotations and so on.
Angular performance can be poor in some cases, especially when using ng-repeat on a large number of elements Considering Speed and Slowness in AngularJS and Scaylr's experience. Other's have mentioned that performance really degrades over ~2000 bound elements, but that's usually met with arguments about how any app with more than that many elements probably isn't a good app. Keep it in mind though if you have legitimate use cases which call for many bound objects.
Angular is popular in terms of contributors, but ranks way way behind, say, jQuery in terms of production usage. Finding Angular developers might be tough, and jQuery or other developers converting have that "steep learning curve" to deal with.
Because Angular is young, you have no guarantee that it'll gain enough traction for your new Angular skills to be employable, and your new application not to quickly become legacy code
In v1.2 Angular doesn't support IE7 and below and v1.3 will drop IE8. For >=IE9, you need to follow some special coding practices.
The many javascript widgets, plugins and libraries which you might be used to using can't be used properly with Angular without heavy modification and people often suggest to re-write your component in Angular anyway.
UPDATE March 2014: after 2 months attempting to build a non-trivial densely functional one page app: There are many versions of Angular, and it's hard to say which is the best or most stable. It will depend on what you're coding with it. I'm finding some bugs Angular that are fixed by upgrading to a later version and others fixed by regressing to an earlier one. I've never had to go version shopping like this with jQuery.
UPDATE May 2014: Young, broken tools. Batarang is great until it doesn't work. I can't trust it until they fix this one.
And finally, the three best resources I've found for learning this stuff
Todd Motto's ultimate guide, and
UPDATE April 2014: this eBook chapter is quite amazing. I didn't buy the rest of the book yet, but the concept is fantastic
A full non-trivial app written in Angular (the accompanying book is OK, but doesn't really talk about the non-trivial app enough, as they appear to be saying advertised on their site)

I would say yes to this and check out John Papa's hottowel implementation as a way to do it.

MVC in C# coexisting with Webforms in VB. Can it happen?

I have inherited a really awful webforms application that is all kinds of bad--an untestable hairy mess of datasets and Page_Load events. Object oriented? N-tier? Unit tests? source control? All academic niceties to the team that built this mess.
It started life as an asp classic app, got mostly ported to VB.NET. Management denied my request to "nuke the entire site from orbit" and start over.
[Insert discourse on how ASP.NET MVC is absolutely, positively the only sane way to to .net websites anymore]
I know we might be able to interoperate between the legacy webforms and mvc. The question is, can we leave the legacy code in VB and build the new stuff in C#? I want to force the conversion to C# so the team doesn't fall back into bad habits.
Is there an MVC 2 Areas strategy that we could use here?

I'm not surprised the idea of a total rewrite was shot down. In general that is a recipe for delay and more bugs, regardless of how buggy the current project.
As far as I know it depends on the kind of project. If the existing project is a web application then no you can not. You could reference external libraries built in C# due to the CLR, however, you will not be able to bake C# code right into the project. This is done all the time and is mostly acceptable.
If the existing project is a web site project then I would have to say yes you can. However, you should not willingly do this unless there is an absolute need to do so. This is just asking for a difficult to maintain project and essentially requires you to do a lot of management in the web.config. I would strongly advise against doing this.
site reference: http://timheuer.com/blog/archive/2007/02/28/14002.aspx
I think you should be able to put this method together with those from the Google search mentioned by an earlier poster. Its going to take a bit of work though.
Additionally, coding practices are pretty much entirely unrelated to the language and from my experience working with mostly web forms and a little MVC, both have their time and place. I would look at laying down a set of practices that must be followed and enforce them using code reviews. Any new code you write would be kept clean and tight while you can also update old code to use standards.

I'm intrigued by your implication that the team's bad habits are caused by use of VB. There are plenty of bad habits in any language: the trick is not to switch language, but to learn good habits.
Anyone's post about this kind of thing is going to be opinion - and in my opinion you'd be better off teaching them to program properly in VB than making them learn a new language that they may struggle with. I've seen great, stable, maintainable VB code and I've seen horrendous, messy C# code. Try not associate a programming language with the quality of output of a team that happens to be using it.
(For the record, I develop in both VB and C# and would always choose C# given the choice - but not because I think I write better code in C#.)

It is possible, essentially by making all the views, etc. in the MVC project embeddable, adding it as a reference to the VB.Net project and then registering the routes.
It's a bit more complicated that that, Matt Honeycutt has a series of posts roughly outlining how he did it here:
http://trycatchfail.com/blog/post/ASPNET-MVC-3-Razor-C-and-VBNET-WebForms-A-Tale-of-Black-Magic-Voodoo.aspx

My first .net web app - should I go straight to MVC framework (c.f. ASP.net)

I'm done some WinForms work in C# but now moving to have to develop a web application front end in .NET (C#). I have experience developing web apps in Ruby on Rails (& a little with Java with JSP pages & struts mvc).
Should I jump straight to MVC framework? (as opposed to going ASP.net) That is from the point of view of future direction for Microsoft & as well ease in ramping up from myself.
Or if you like, given my experience to date, what would the pros/cons for me re MVC versus ASP.net?
thanks

Have look here it will help you Choosing the Right Programming Model

If you need to work really close to the wire then MVC is a great choice. By this I mean, if you need to have very tight controls over markup then; while acheivable with WebForms; it is much easier with MVC. This would be common for applications that are targeting a public (e.g. internet) audience which might have a richer graphical experience. In contrast, if you're developing an internal (e.g. intranet) business application where graphical presentation is not as critical, then WebForms has a lot of really nice enabling capabilities that will allow you to move more quickly.
Don't get me wrong, you can make WebForm applications look really really nice, but you give up some control over the markup.
Very often ViewState comes into this kind of discussion. MVC will not have any ViewState so the on-the-wire footprint will be much smaller which translates to speed and bandwidth cost savings at some point. On the downside, making stateful applications with MVC can be more painful. In contrast, WebForms will carry ViewState by default and are inherently more stateful. This is typically fine for internal applications. Keep in mind that ViewState does not have to be sent over the wire... there are extensions that allow you to offload that to a local cache. I'm not favoring one over the other, but you should be aware of what each can do in this regard.
If unit testing is important to you then MVC is also a much better choice, as this is easier as well. This is totally acheivable in WebForms but requires you pattern your code behind correctly.
Security is not a major factor since much of setting up the IPrinciple and IIdentity occure in the HTTP pipeline via HttpModules, so either will do in that regard.
Another major factor in making your choice relates to your skills relative to the time you have to deliver... If you're not used to working in a stateless manner or coding standard web technologies (e.g. html, css, jquery, etc...) MVC will take you longer to do very basic things. With that said, once in place it will likely be cleaner, smaller, more testable, and faster. If you need to move very quickly there is a lot you can do faster in WebForms. WebForms also does a lot of heavy lifting with respect to markup so there are a number of details you can leave to ASP.NET.
I actually use both for a variety of reasons, and MS has stated they plan to continue support and development for both.

MVC is part of ASP.NET. You must mean MVC vs Webform to which the answer would be: coming from a Winform background, you will find webform easier to use. For the future, go MVC.

I used to work on desktop applications too, and never really got into web stuff. I didnt even (gasp!) knew HTML (yeah, that was my programmers shame). In my new job we were going to start a new application using ASP.NET MVC and I gotta tell you, I love it. HOWEVER I think you should only go with MVC if you are or you count with someone with good html/css design skills.
Html is easy I know (I've learned it know!) but I think its kind of hard to make nice designs with html and css, specially if you suck at designing and you could probably do prettier stuff using webforms, which is a little bit easier/similar to winforms.
Also, if you go the MVC way make sure you have enough time to learn it, since you are going to go a little bit more low level, gonna have to learn more of the little details, like the actual difference between post/get and all that stuff that is pretty much completely hidden in webforms. I would really recommend getting a book, I used this one Pro Asp.net MVC and really liked it.
Finally, if your page is gonna have interactive bits, or ajax-y things, if you go the MVC way you are more likely gonna have to learn javascript/jQuery too. If you go the webforms you can use the included drag'n drop ajax controls.

Coming from Ruby on Rails or other MVC based frameworks ASP.NET MVC is almost the best choice. (ASP.NET MVC is actually only the "VC" part, so you have to add an ORM of your choice. EF and Linq to Sql is the Microsoft way, NHibernate or other ORM's are the other way. One good quick start project is S#arp Architecture which uses NHibernate as the "M" part, or you can check out WHCM, which is a project built on S#arp Architecture and other good frameworks (it is considered an ASP.NET MVC best-practices demo project) ). ASP.NET MVC uses almost nothing from the WebForms package (the only exception I found is the AntiForgeryToken), so you'll loose nothing if you're unfamiliar with ASP.NET WebForms.
But as you said you have also made console applications, which ASP.NET WebForms resemble more.
If your project is new, I advise you to use ASP.NET MVC. If your project clearly separates the M-V-C part (like in S#arp Architecture, where they reside in different assemblies), creating a console application that uses the same business logic shouldn't be too hard. If your current project is to port a WinForms application to the web, then it might be easier to use WebForms.

I should get familiar with the language before using "fancy" stuff like MVC, because it's just way easier to learn when you could almost think in the language (but it's not necessary).

Horses for courses. If you're slapping together a quick app for someone, web forms is probably quicker and easier.
If you're building a long running enterprise app MVC gives you better testability a SoC.

Lightweight .NET web development?

I'm currently working on a project that has a sizable amount of both client and web code. The client code is written in C# and the web piece is written in PHP. Maintaining consistency between the two worlds is becoming cumbersome, and I want to consolidate the web code to .Net.
The issue is that I hate web development in ASP.Net Web Forms. I want something as raw as PHP, just using C# instead. I've read a little about ASP.Net MVC, but it looks like it abstracts too much of the request logic for my liking.
Does anyone know of a lightweight way to allow C# + .Net to handle web requests? Should I be looking more closely at MVC?
Update: I went with ASP.Net MVC and I've been very pleased so far.

If you're looking to get away from ASP.NET Web Forms, the I recommend ASP.NET MVC with a custom view engine (like Spark, or NHaml). This will give you the consolidation your looking for and allow you to avoid most of the Web Forms that your not happy with.
AFAIK, to do .NET web development, you are going to have to interact with ASP.NET in some form or another, but the custom view engines in MVC could be exactly the abstraction your looking for.

It is now possible to use a software stack completely separate to IIS and ASP.Net using Kyak, Nancy and Gate.
http://bvanderveen.com/a/gate-0.1.0/

You might want to check out Kayak, which is, to my knowledge, the only standalone .NET web development framework that's not ASP.NET.
Caveat: Kayak's request handling implementation is not the best, so there may be performance or scaling issues. I can't say for sure -- I've only read it, not run it.
Edit: I've taken another look at the source code, and it looks like they've rewritten a significant portion of their server code, and in doing so fixed the major issues. Performance probably won't be a problem.

MVC.NET is open source, so you can make it do what you want. It is a framework that is overrideable, extensible, etc. I'd look closer at it. It works great for me and I've come from a background of CGI, Struts and Webwork. I love it.

In my opinion nothing is more lightweight than the combination of NancyFX (http://nancyfx.org/) with Dapper (https://github.com/SamSaffron/dapper-dot-net) for data access.
NancyFX can be hosted within ASP.NET, WCF, Azure, OWIN-compatible environments, Umbraco or you can write your own host.
Read also these articles:
http://theothersideofcode.com/lightweight-development-in-dot-net-nancy
http://theothersideofcode.com/lightweight-data-access-in-dot-net-massive
I also suggest you to TinyIoC (https://github.com/grumpydev/TinyIoC) for decouple your application layers.
Regards,
Giacomo

You should look into the IHttpHandler and IHttpModule interfaces. These are the foundations for ASP.NET WebForms. Brad Wilson has a good intro to the former.
In the bad days when WebForms was the way to do ASP.NET development I was writing my own simple MVC framework with these interfaces. The bit I struggled with at the time was the View engine but now there are a number of these.
You take a closer look at ASP.NET MVC since the source is available and decide for yourself. It may be that you want to change some of the conventions used rather than the whole framework.

Asp.Net MVC vs Castle MonoRail

I've some experiences on build application with Asp.Net, but now MVC frameworks become more popular. I would like to try building new multilingual web application using with Asp.Net MVC or Castle MonoRail but I don't know which one is good for me. I don't like the web form view engine, but I like routing feature in Asp.Net MVC.
Could anyone tells about pros and cons between those?
Which ViewEngine is the better as well for overriding the master template?

Speaking as an advocate of monorail, I've got to say you should probably go for ASP.NET MVC. To be honest, the simple fact that ASP.NET MVC is going to become the default architecture within three years should probably swing it. This equation was different a year ago, simply because the default architecture had serious productivity problems compared to MonoRail.
If you want to talk technical advantages and disadvantages:
ASP.NET AJAX is a mess (avoid it), but they've now got jQuery. In fact, the jQuery support is better than any other environment. Of course, you only fully get that with IDE integration with the standard view engine.
There are some aesthetic improvements (for instance, the way model information is passed around is much cleaner and more obvious than Monorail).
Also, don't dismiss the standard view engine out of hand. You don't have to throw controls at it like you did with ASP.NET, you can code it in a pretty similar manner to Brail, only using C# instead of Boo.
There are things that are just plain ugly
* the number of methods that take object for a parameter. Good luck finding the documentation on what exactly they expect.
* Microsoft's fondness for abstract classes over interfaces. They have their reasons, but I still dislike it.
Also, in many ways, MonoRail remains the more complete platform. There's no abstraction for validation or paging in ASP.NET, for instance. Also, there's not really any help for binding to a model. The helpers have very little functionality compared to their Monorail equivalents.
Overall, though, I think ASP.NET MVC is a winner.

MonoRail and ASP.NET MVC are fundamentally very similar, you should be well off using either one of them. MonoRail has existed much longer and has therefore more higher level features.
The main strength of ASP.NET MVC is it's routeing engine, to be fair MonoRail has pretty much an equivalent routing engine, and with some modification you can use the ASP.NET MVC routing engine with MonoRail as the routing engine is not really in ASP.NET MVC but in System.Web.Routing (Released in .NET 3.5 SP1). ASP.NET MVC and integration with Visual studio is also a plus, and will probably get better as we approach RTM of v1.
The MvcContrib project contains some great view engines, like Spark, NHaml and Brail. No one could be considered "Best", A personal favourite is Spark. For more on spark: http://dev.dejardin.org/documentation/syntax
The WebForms engine has intellisense which is a great advantage that to my knowledge all alternative view engines lack.

Apart from perceived popularity and support from Microsoft, ASP.NET MVC still lacks some core features that Monorail has had for a long time like controller organization (Areas), native ViewComponents and Filters that can use IoC to name the most important ones.
I have some big applications that use all of these features and I've had a hard time porting them to ASP.NET MVC.
I have worked with Monorail for some years now and while MVC looks promising and it's flexibility is awesome, I still find it akward that for every other thing I try to do, turns out it isn't there and I have to either plug a little piece of MvcContrib, another piece of SharpArchitecture, build it myself, you get the picture. Monorail is so much easier to work with (right now, that is).
I expect things will get better in the next few of months as some proposed solutions will begin to rise against others and become more mainstream. Hey, diversity of options is good but trust me, you don't want to be in Java-land 3 years ago where there were so many web frameworks that you could build your site using one for every different page!
In the meantime I will keep slowly porting my MR apps to MVC, just in case.

I think MVC wins hands down. Its feature set is very similar, but is going to be the more "popular" of the two (and thus typically more widely supported, documented and extended throughout the development community). In addition, the new ViewEngine (Razor).. and IDE improvements factor in for me, and boost the value of choosing MVC over monorail, in my opinion.
I've used pretty much all the common ViewEngines, but wound up rolling my own (created an OpenSource Project for it) utilizing the awesome StringTemplate template engine. ST is a true separation of concerns, IMO. I find myself writing better apps as a result, with MUCH less tag soup. I also threw out a quick intro and reference guide if you choose to kick the tires on the engine. I've had awesome luck on projects I've deployed thus far using it. That being said, Razor (MVC 3) looks pretty impressive.