ASP.NET MVC

Re: Could not load type... in strongly typed view

gerrylowry — Fri, 10 Apr 2009 12:17:30 GMT

Stephen, does this happen on other computers?

I had a problem that occurred version after version.
I falsely assumed, since the whatever version still had the same bug
that Microsoft had failed to fix, that is was not even being tested.
A member in Japan also had that bug. Since the bug was so easy to demonstrate,
I falsely assumed that Microsoft was not testing properly.

I was wrong. Phil Haack could not reproduce the bug
and other members of this forum who tried at my request
also could not reproduce it. I'm not saying that it was not
a bug because it was. Unfortunately, it was a random bug
that does not affect everybody and is therefore difficult to exterminate.

Once I realized that this was a random bug, I used the free
VMware Server 2 to build a clean virtual version of Windows XP Pro SP3
inside of my Windows 2003 and applied every Windows Update to the
fresh, virtual XP Pro platform.

Next, I did a clean install of VS 2008 Pro, updated it to VS SP1,
installed the then current version of ASP.NET MVC, and repeated
my test. The random bug did not reoccur.

That's why I'm asking whether this happens on other computers
to your knowledge. I strongly feel that everyone needs to get on
the final version: ASP.NET MVC v1.0 (a.k.a. RTM) as the best
practice. It's better unless someone is holding a gun to your head
(figuratively) to transition now because Microsoft's only version of
ASP.NET MVC that is officially supported is v1.0 and also
because all future development by Microsoft and likely by most
third party developers with be on v1.0 as a starting point.

Regards,
Gerry (Lowry)

Re: Could not load type... in strongly typed view

stephen_k_walsh — Fri, 10 Apr 2009 09:54:57 GMT

It is the RTM version that screws up VS, the Beta versions were fine!

Re: Could not load type... in strongly typed view

gerrylowry — Thu, 09 Apr 2009 16:38:39 GMT

Just curious Stephen: Is there some reason you are avoiding the final version: ASP.NET MVC v1.0 (a.k.a. RTM)
which also has as a bonus its being officially supported by Microsoft?

You can get to it via this link http://www.asp.net/mvc/.

gerry

Re: Could not load type... in strongly typed view

stephen_k_walsh — Thu, 09 Apr 2009 15:10:07 GMT

Thanks for the link to the fix. VS has been crashing every time I opened a .aspx file since I moved from MVC Beta to RC1

Re: Could not load type... in strongly typed view

lauge — Fri, 13 Mar 2009 08:14:00 GMT

littlefool >> your comment on the web.config in the View folder did it for me. Thanx!

Re: Could not load type... in strongly typed view

Michael2009 — Tue, 03 Feb 2009 18:44:08 GMT

Oh, I've found the answer. It's a bug (http://stackoverflow.com/questions/492671/problem-using-add-view-dialog-in-asp-net-mvc-rc1-for-strongly-typed-view).

Re: Could not load type... in strongly typed view

Michael2009 — Tue, 03 Feb 2009 17:56:42 GMT

I have a problem with "Add View" wizard too (MVC RC1). But it is related to type resolution.

I have Common.dll which contains interfaces for my domain model (for example, IEntity). Domain.dll references Common.dll and contains actual business entities (like Customer : IEntity).

MVC project references both of these assemblies so they are located in \Bin folder.

When I try to add a strongly typed view for Customer I get the following exception:

---------------------------
Template Processing resulted in 1 Errors
---------------------------
C:\Program Files\Microsoft Visual Studio 9.0\Common7\IDE\ItemTemplates\CSharp\Web\MVC\CodeTemplates\AddView\List.tt(-1,-1) : error : An Exception was thrown while running the transformation code. The process cannot continue. The following Exception was thrown:

System.TypeLoadException: Could not load type 'Common.Domain.IEntity' from assembly 'DomainModel, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.

Server stack trace:

   at System.Reflection.Assembly._GetType(String name, Boolean throwOnError, Boolean ignoreCase)

   at System.UnitySerializationHolder.GetRealObject(StreamingContext context)

   at System.Runtime.Serialization.ObjectManager.ResolveObjectReference(ObjectHolder holder)

   at System.Runtime.Serialization.ObjectManager.DoFixups()

   at System.Runtime.Serialization.Formatters.Binary.ObjectReader.Deserialize(HeaderHandler handler, __BinaryParser serParser, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage)

   at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize(Stream serializationStream, HeaderHandler handler, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage)

   at System.Runtime.Remoting.Channels.CrossAppDomainSerializer.DeserializeObject(MemoryStream stm)

   at System.Runtime.Remoting.Channels.CrossAppDomainSerializer.DeserializeMessageParts(MemoryStream stm)

   at System.Runtime.Remoting.Messaging.SmuggledMethodCallMessage.FixupForNewAppDomain()

   at System.Runtime.Remoting.Channels.CrossAppDomainSink.DoDispatch(Byte[] reqStmBuff, SmuggledMethodCallMessage smuggledMcm, SmuggledMethodReturnMessage& smuggledMrm)

   at System.Runtime.Remoting.Channels.CrossAppDomainSink.DoTransitionDispatchCallback(Object[] args)

Exception rethrown at [0]:

   at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)

   at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)

   at Microsoft.VisualStudio.TextTemplating.TransformationRunner.RunTransformation(String fullClassName, String baseClassName, String[] importedNamespaces, String[] references, String source, String inputFile, Boolean debug, SupportedLanguages language, IDictionary`2 languageOptions, IFormatProvider format, ITextTemplatingEngineHost host, Boolean cacheAssemblies, String& result)

   at Microsoft.VisualStudio.TextTemplating.Engine.CompileAndRunCode(String generatorCode, ITextTemplatingEngineHost host, TemplateProcessingSession session)

Re: Could not load type... in strongly typed view

littlefool — Mon, 02 Feb 2009 09:06:59 GMT

Well, I kind off solved it.

Thanks deerchao for the web.config tip. I forgot to look at the views config file as well. The new project contained a little more data like this:

    <pages 
        validateRequest="false"
        pageParserFilterType="System.Web.Mvc.ViewTypeParserFilter, System.Web.Mvc, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"
        pageBaseType="System.Web.Mvc.ViewPage, System.Web.Mvc, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"
        userControlBaseType="System.Web.Mvc.ViewUserControl, System.Web.Mvc, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
      <controls>
        <add assembly="System.Web.Mvc, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" namespace="System.Web.Mvc" tagPrefix="mvc" />
      </controls>      
    </pages>

As you can see, the pages item has now a couple more attributes linked to types. After copy/past this in my old project, the page got loaded.

But then I got the same problem as Nairb was mentioning. When trying to open the view in the IDE, it just shuts down.
I "solved" this by uninstalling the "Visual Studio 2008 PowerCommands" plug in.
So besides loosing this plug-in, the project runs again.

Few more notes...
A new created project with RC1 works perfect with the PowerCommands plug in
I still don't see the System.Web.Mvc reference in the "Add Reference" dialog altough it is installed in the GAC (gacutil)

Re: Could not load type... in strongly typed view

Nairb — Sun, 01 Feb 2009 19:26:51 GMT

To anyone having crashing issues, try disabling any VS plugins you may have installed. There was a thread on StackOverflow1 about this same issue. I had to disable my Huagati DBML/EDMX Tools add-in and others disabled TestDriven.net and Gallio.

1) http://stackoverflow.com/questions/500696/why-does-visual-studio-crash-opening-aspx-with-mvc-rc1/

Re: Could not load type... in strongly typed view

Nairb — Sun, 01 Feb 2009 16:16:30 GMT

I was having very similar problems. Changing out the web.config file under ~/Views/ helped out a bit. I can now run the site with the views working correctly.

Unfortunately, I'm now experiencing a crashing problem from within VisualStudio when opening the view for editing. The entire IDE process simply goes away. Upon restart and reopening of the solution file, I am told that the documents caused the crash and are thus not being opened this time by default. Still, this doesn't help me.

Interestingly, even within a non-strongly-typed view page, VS can't resolve the Html helpers. Specifically, Html and Request can't be found.

Finally, I too don't see System.Web.Mvc in my Add References dialog. Something is clearly amiss. I've tried reinstalling several times, new web.config files, etc. I think there's some obvious sort of problem with VS and MVC now. At least the site runs correctly though.

Can we get any official word on this? Is there a manual process to fix VS integration and ensure System.Web.Mvc shows up in the Gac?

Re: Could not load type... in strongly typed view

Luis Abreu — Sun, 01 Feb 2009 15:32:27 GMT

Yep, had forgotten about the web.config on the Views folder. That one must point to the correct version too...

Re: Could not load type... in strongly typed view

deerchao — Sun, 01 Feb 2009 14:50:44 GMT

Create a brand new Asp.net MVC Application, copy ~/Views/Web.config to override the one of your existing project.

If it's still not working, do the same for ~/Web.config (and of course merge the changes you've made).

I've met the problem because some of these places references the GAC version of System.Web.Mvc assembly, and my code references my custom build of the released source code.

Re: Could not load type... in strongly typed view

DmitryRA — Sun, 01 Feb 2009 02:53:00 GMT

Doesn't work after the project migration. Something breaks it... Can't find out what.

Re: Could not load type... in strongly typed view

DmitryRA — Sat, 31 Jan 2009 22:15:23 GMT

Absolutely the same thing. I don't see an assembly in reference .NET menu. I've tryed to add manually from (program files/microsoft asp.net/asp.net mvc rc/assemblies), tryed to set copy local or get from gac, tryed to delete all the old assemblies. Tryed to copy them manually and add from \bin. Works only on new project.

I can copy classes to a new project, etc... But what is wrong? I can't understand. Why doesn't it work when I copy assemlies and set them manually?

Re: Could not load type... in strongly typed view

Luis Abreu — Sat, 31 Jan 2009 21:55:40 GMT

Hello again.

I've installed MVC RC on another machine and i can confirm that it is on the gac and listed on the add reference dialog. if it's not there, then something has gone wrong. btw, do keep in mind that being in the gac is not enough for being shown on the add reference dialog:

http://www.csharp411.com/adding-assemblies-to-the-visual-studio-add-reference-dialog/

Having said that, I'm not sure on why you're not seeing the assembly on that dialog...