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Repository Pattern - Pagination, Sorting

Posted By:      Posted Date: September 13, 2010    Points: 0   Category :SharePoint
Hi All, envt: MOSS 2007 I have been trying to get my head around on P&P for 2007. It looks fine and adaptable but I do not see pagination / sorting designs implemented there. End of the day in the User Interface we need to provide the ability ot page and to sort the data (ASP.NET Grid in user control). Now in P&P we don't have datatables (weakly typed) but have domain models (strongly typed). Now had this been datatables, I could have retained the datatable in memory (cache / session) and could have gone back to it every time a user sorts / or does paging. But with domain objects we don't have that flexibility but will have to implement the logic on our own. Thats is fine, But i dont see a IQueryable or something of that sort being passed back. 1) Any ideas on how to do this with clean separation of concerns? 2) If we are going IQueryable way of exposing a say - DomainObject.FindByLoginName(id) - Then we dont have an option, but to go to the database for every call? Right ? Is that a good design OR do we other better ideas ? Cheers    

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Repository Pattern Question. Confused need help.



I been reading Repository Pattern implementation for MVC 2. I am confused due to few things.

Simple Implementation is below.

Tables : Contact has One to Many relation with AssignToCategories
1 - Contacts
2 - AssignToCategories

I have in Model folder


My Questions

1 - We can use ContactRepository directly in View. Why we need IContactRepository for. As long as I know its for Test. Am I right?. If not than whats the purpose.
2 - I have seen ContactService, IContactService. As for as I know its for Business logic. Is there more to it?
3 - Contact has relation to AssignToCategories. Should I put all the data reterival logic within ContactRepository or this AssignToCategories need to have separate Repository and Interface.

I need some help with the concept. Though I have done alot of reading but still confused.

There is one layer called Pipe and filter. Whats the used of that?


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