ObjectProvider, ObjectView, and Other

I have question:

1. Is ObjectProvider and ObjectView component available only in .NET 3.5 project only?
2. I have added ObjectProvider in my Form, and set the QueryCondition to : SELECT * FROM BookExtent b WHERE EXISTS s IN b.stocks : (s.storage=$1)
   How/when to set $1 parameter value in code?
3. I have persistent fields with nvarchar (2000), I'm using SQLSERVER EXPRESS 2005 as a backend, but when I try to save text in 1000+ char from textarea (bellow 2000 char), it's get truncate. I'm using it in my MVC apps, is this textarea length limitation, MVC, or OpenAccess  BUGS?

More question.
I have persistent(s) class something like this:

[Persistent]
public class Book
{
    string title;
    IList<Stock> stocks;
}

[Persistent]
public class Storage
{
    string name;
}

[Persistent]
public class Stock
{
    decimal qty;
    Storage storage;
}


Every book have 1:n Stock.

Sample data:
1. Book: title=C++ In 24 Minutes
    stocks: #0: Storage.name=Default, qty=1
2. Book: title=VB.NET for Dummies
    stocks: #0: Storage.name=Default, qty=5
        #1: Storage.name=Warehouse, qty=95

If I want to show only book with storage.name=Default what is the most optimized OSQL?
I'm using this OQL: SELECT * FROM BookExtent b WHERE EXISTS s IN b.stocks : (s.storage.name=$1)
But every access of Book.stocks[0].qty OpenAccess send 1 SQL, If the Book data 1000, will result additional 1000 Sql Query?

1. The ObjectProvider and ObjectView are available for both .Net3.5 and .Net2.0.

I don't see any ObjectProvider and ObjectView component in toolbox when developing with WinForm and .NET 2.0, it's show when I switched to .NET 3.5.


Best Regards,
Fakhru Rahman

Hello Fakhru,
That is a problem  with our api assembly, it links against 3.0 as well but is working fine with a .net 2.0 application. Nevertheless the designer thinks that it is a 3.0 minimal version assembly and it is not showing the toolbox entries. You can switch your project temporary to 3.0 and put everything on your pages, then switch back to 2.0, that will work. Another way is to show all entries in the toolbox, select the one you need, press copy on the keyboard, select the form and press paste.

Kind regards,
Jan Blessenohl
the Telerik team