ASP.NET MVC 3 Preview 1 Released

Jul 27, 2010 aspnet code aspnetmvc suggest edit

UPDATE: This post is a out of date. We recently released the Release Candidate for ASP.NET MVC 3.

Feels like just yesterday that we released ASP.NET MVC 2 to the world and here I am already talking about an early preview. In a way, we’re right on schedule. It was almost exactly a year ago that we released Preview 1 of ASP.NET MVC 2.

Today I’m happy to announce that ASP.NET MVC 3 Preview 1 is available for download. Give it a try out and let us know what you think. Some key notes before you give it a whirl:

ASP.NET MVC 3 Preview 1 tooling requires Visual Studio 2010
ASP.NET MVC 3 Preview 1 runtime requires the ASP.NET 4 runtime

As usual, to find out what’s in this release, check out the release notes. Also at the recent MVCConf, a virtual conference about ASP.NET MVC, I recorded a talk that provided a sneak peek at ASP.NET MVC 3 Preview 1. The audio quality isn’t great, but I do demo some of the key new features so be sure to check it out.

So what’s in this release that I’m excited about? Here’s a small sampling:

Razor View Engine which ScottGu wrote about recently. Note that for Preview 1, we only support the C# version (CSHTML). In later previews, we will add support for the VB.NET version (VBHTML). Also, Intellisense support for Razor syntax in Visual Studio 2010 will be released later.
Dependency Injection hooks using service locator interface. Brad Wilson should have a few blog posts on this over the next few days.
Support for .NET 4 Data Annotation and Validation attributes.
Add View dialog support for multiple view engines including custom view engines.
Global Action Filters

In the next few days you should see more details about each of these areas start to show up in various blog posts. I’ll try to keep this blog post updated with relevant blog posts so you can find them all. Enjoy!

Scott Guthrie has a detailed write-up of what’s new in ASP.NET MVC 3 Preview 1 in his trademarked style.
Brad Wilson describes Service Location in ASP.NET MVC 3 in his four part series.
Scott Hanselman recently barged into my office to discuss ASP.NET MVC 3. I was totally unprepared so I sent him to talk to the intern, Morgan, who shares my office while I scrambled. So if you’re interested in watching a schizophrenic video about ASP.NET MVC 3 Preview 1 and the unrelated Sprite Control for ASP.NET, check out this Channel 9 video.
I recorded a video about ASP.NET MVC 3 Preview 1 for the MVCConf. I’m linking to it again here for convenience.
Eilon Lipton just posted his ASP.NET MVC 2 to MVC 3 Application Converter
Jacques Eloff writes about adding custom view templates to a project.

Found a typo or mistake in the post? suggest edit

Comments

38 responses

Miechu • July 26th, 2010
Wow, that is kind of... fast... are there any chances that mvc3 tooling will be available for vs2008?
Matt Hidinger • July 26th, 2010
@Miechu Unfortunately they said that MVC 3 takes a dependency on .NET 4 so VS 2008 support won't be coming.
@Haacked Downloading now! Looking forward to the metadata and validation improvements... the complex validation I have in my app using MVC 2 has grown to become some of my least favorite code, I will branch and spike out MVC 3 to see how much it could clean up the code.
Thanks for the preview!
-Matt
Tom Frey • July 26th, 2010
@Haacked Is Intellisense for Razor supposed to be working in this preview? I followed the upgrade procedures and see the tooling support for Razor but don't get any Intellisense.
Matt • July 26th, 2010
@Tom Frey In his MvcConf session, he said that there is no intellisense for Razor in Preview 1, but that it should be there by Preview 2.
Mike • July 26th, 2010
Will you be releasing the Razor engine for MVC 2?
Nelson • July 26th, 2010
What about syntax highlighting? It appears as if there is no tooling at all for cshtml files. Is this expected, or is my install broke?
Koistya `Navin • July 26th, 2010
Great news! Downloading... Will Razor be the default choice as a view engine in ASP.NET MVC 3? (that would be cool)
Martin • July 26th, 2010
@Nelson Your installation is not broken. How can you see on this page weblogs.asp.net/... ...there is no syntax highlighting in this version.
Joe • July 26th, 2010
Ugh...for real? I literally just ordered the MVC2 book like...a week ago. It's not even here yet.
It's cool though - you keep putting new awesomeness out to be available to the masses. Keep it up!
Nelson • July 26th, 2010
@martin: Thanks :) Scott Gu seemed to sneak that post by while I wasn't looking.
@phill: Awesome, I'v been looking forward to playing around with razor with ASP.net MVC for a while now. Keep up the awesome work with this project :)
haacked • July 26th, 2010
Hi all, there is no Intellisense or syntax highlighting for Razor in Preview 1. That will come in a later release.
@Mike, there are no plans to release Razor for MVC 2. It requires ASP.NET 4 and MVC 2 is compiled against .NET 3.5 SP1.
Miechu • July 27th, 2010
@haacked @matt
Well I don't know how things are done in mvc tooling but I don't see any reason that the tooling has to be .net 4 dependent, but even assuming that it is... wait.. just notice I can't develop .net 4 app with vs2008 (I was pretty sure I could)... hmmm... that sucks... well... keep up the great work and I'll check mvc3 sometime in the future ;)
g • July 27th, 2010
Would be nice if MVC dropped server side view templates and threw everything at jquery-tmpl and script#, it would be nice to have a well supported GWT alternative, probably just pipe dreams at this point though.
Shiju Varghese • July 27th, 2010
Congrats for the new release
Henning Anderssen • July 27th, 2010
Great news.
When do you think the final release will be finished?
Marco P • July 27th, 2010
awesome stuff, two requests!
1. Support for going in/out of HTTP in a DRY way.
2. RedirectToUrlResult which will either redirect to a specified url of look for a ReturnUrl (convention) in the params.
Rick Schott • July 27th, 2010
Great post and thanks for the MVCConf talk.
James Snape • July 27th, 2010
Hi Phil,
What is your intended ship vehicle for this - out of band or with the next Visual Studio?
Synapse • July 27th, 2010
I'm kinda disappointed with this release.
I was hoping for real caching and support for editing multiple entities at once (like Django formsets) but MVC3 offers only minor improvements.
haacked • July 28th, 2010
@James Snape: Out of band for sure since we'll release before the next version of Visual Studio. We'll probably also have a version of MVC in the next Visual Studio, but we don't know yet which version it will be. There's a lot of planning still going on.
Martin Wawrusch • July 29th, 2010
Any chance we will see a F# version of Razor anytime soon?
Terry • July 30th, 2010
Is it possible to mix ViewPage (aspx) and Razor (cshtml) within the same solution? Think it is. What about hooking Razor files up to existing master (.master) pages? Any way/workaround to pull that off? Or would I have to basically have a 'duplicate' of site.master (one ViewPage and one Razor layout file) if I wasn't ready to convert entire site to Razor view engine all at once?
Martin • July 30th, 2010
What about performance ? Have you forgot about that or is it something that you are also working on?
I guess as more features come along, the performance will also degrade. Especially with the heavy use of Reflection and Expression Trees which i guess is the heaviest parts ?
Just want to know if any time/work is being put into that area ? :)
Denis • July 31st, 2010
I'd like to see T4MVC integrated in asp.net mvc.
I mean, we all know that strongly-typed helpers are a great.
kad1r • August 3rd, 2010
Great new. I'm downloading right now.
Are there training videos to learn MVC3?
Felipe Lima • August 10th, 2010
Phil,
I tried upgrading my MVC 2 project to MVC 3 preview 1 and ran into problems with my typed views. The ViewPage<T>.Model property stopped working and my project stopped running. It seems like the ViewPage<T> views were being treated as regular ViewPage classes and, thus, the Model property had a type = object. Maybe that is a issue you guys could take a look.
Thanks for the good work!
Felipe
Josh Williams • August 16th, 2010
@Felipe: Same here - all my views are broken. My Model.<Class> accessors are no longer available for my custom viewdata. It's so soon I havn't seen any posts on resolutions for this.
Josh Williams • August 16th, 2010
I think I found the issue (atleast for me) - my <%@ Import Namespace... %> messed it up for some reason. Once I removed these unused imports - it works fine. This could be a bug I guess? My import was for a simple Html Helper I made.
Feng • August 18th, 2010
Any plan to add support for localization and theme
shawn • August 24th, 2010
I commented a little while back, but it looks like it might have been eaten because it had a link in it. Are there any plans to add model binding support for updating objects with existing child collections? Right now if you call UpdateModel(model) on a model that has an initialized ChildItems collection, the model.ChildItems collection doesn't get updated properly. I'd be happy to submit a patch that is working for our scenarios.
I'd also love to see some sort of baked in support for using the [Key] data annotation (or equivalent unique/primary key in LinqToSql/EF) as an index key for items in collections to avoid concurrency errors.
Scotteg • August 26th, 2010
Phil,
As for the name of the Dynamic View Object. I don't understand why the ViewData object itself can't just be give Dynamic traits. So people should be able to do this ViewData.Message = "Fred";.
Regards,
ScottEg
Deke • August 31st, 2010
I am running into the same problem as Felipe. Whenever I add a <%@ Import Namespace=... %> to an apsx page the Model loses whatever it's type was and reverts back to being a plain old object. Any work arounds for this other than the obvious (don't use import) or am I doing something wrong here?
Deke • August 31st, 2010
Actually found the work around over here http://forums.asp.net/p/1587136/4012958.aspx
for the Import Namespace problem
Bill • September 2nd, 2010

Actually I've found a way to avoid the bugs with these previews and such, I avoid them and wait for the released product. Sure I read up on the details about the upcoming features but to seriously try and use them? Never. Only time I did that was for ASP.NET 1.0 itself, and only because it was so much of an improvement over ASP.
John • September 7th, 2010
This is an old post but I wanted to vote on something for MVC 3. The razor syntax is sweet by the way. My vote: I want to see stronger jquery validation support using data annotations while using jquery ajax. I would like to see the jquery validation/ajax combinations to play nice with the newer .net 4.0 features, like data annotations for validation.
Scotteg • September 20th, 2010
Phil,
In a masterpage it is possible to place html in the content placeholder that is only replaced if the 'child' page chooses to do so.
It doesn't look as if this is possible in a layout page. I think this is a significant loss of functionality.
Thoughts?
ScottEg
Shiv Kumar • October 2nd, 2010
@ScottEg,
Yes this is possible in Razor using the following in your Layout page:
@RednderSection("someSectionName" options:true).
What that says is the section is optional and Views can choose the render/implement the section.
In a view in which you wish to implement this section, simply do
@section someSetionName {
<h2>This is an optional section, but rendered in this view</h2>
}
Alireza Halani • December 1st, 2010
The Razor engine is great and surely rocks. It would be nice to have some more advance documentation..

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