Databinding and ActiveRecord - Screencast Three

April 19th 2007, 12:30 pm in .NET, Monorail, Screencasts.

The third screencast in the series talks about the Databind attribute in Monorail, which allows you to bind values to objects. I also extend the example to use ActiveRecord, and save the databound object to a database.

http://colinramsay.co.uk/screencasts/3/

It begins to highlight some of the more advanced uses of Monorail, and introduces the Castle implementation of the Active Record pattern. In the next screencast, I’ll be consolidating on the topics I’ve covered so far and address some of the real work problems which Monorail can easily solve.

One point of relevance: the use of ActiveRecord with Monorail is completely optional. I’ve used it here because I feel they integrate well, but if you’ve got another persistance framework which you’d prefer to use then that’s possible too!

Don’t forget to watch Getting Started with Monorail and Using Monorail, the first two screencasts in the series.

Responses to “Databinding and ActiveRecord - Screencast Three”

  1. [...] Databinding and ActiveRecord - screencast   [...]

    Kevin Miller : Monorail Screencasts

  2. Colin,
    Ive been watching your screencasts and following along on my own. Ive gotten to the point where im trying to save the user to the database. I am getting an exception (below) when user.Save(); line is executed. Do you have any idea what is causing this?

    [AssertionFailure: null id in entry (don't flush the Session after an exception occurs)]
    NHibernate.Impl.SessionImpl.CheckId(Object obj, IEntityPersister persister, Object id) +146
    NHibernate.Impl.SessionImpl.FlushEntity(Object obj, EntityEntry entry) +220
    NHibernate.Impl.SessionImpl.FlushEntities() +310
    NHibernate.Impl.SessionImpl.FlushEverything() +168
    NHibernate.Impl.SessionImpl.Flush() +104
    Castle.ActiveRecord.Framework.SessionFactoryHolder.ReleaseSession(ISession session) in c:\srcfile\CastleProject\trunk\ActiveRecord\Castle.ActiveRecord\Framework\SessionFactoryHolder.cs:214
    Castle.ActiveRecord.ActiveRecordBase.InternalSave(Object instance, Boolean flush) in c:\srcfile\CastleProject\trunk\ActiveRecord\Castle.ActiveRecord\Framework\ActiveRecordBase.cs:540
    Castle.ActiveRecord.ActiveRecordBase.Save(Object instance) in c:\srcfile\CastleProject\trunk\ActiveRecord\Castle.ActiveRecord\Framework\ActiveRecordBase.cs:482
    Castle.ActiveRecord.ActiveRecordBase.Save() in c:\srcfile\CastleProject\trunk\ActiveRecord\Castle.ActiveRecord\Framework\ActiveRecordBase.cs:1232
    Fantasy.Controllers.AccountController.Register(User user) in c:\Users\Loren\Documents\Visual Studio 2005\WebSites\Fantasy\Controllers\AccountController.cs:32

    Loren

  3. Loren: try debugging on user.Save and check that the values of user are what you’d expect…

    Colin Ramsay

  4. just finished watching this one.
    Great stuff! Any chance of you going to make more?
    Oh oh.. #4.. watching

    andriy

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