[02/03] Enumerating a subset of a strongly typed collection

Hi

I have a strongly typed collection of Employee objects called EmployeeCollection and the Employee object exposes a property for departmentCode. I need to do some processing on employees belonging to specific departments so I though I'd have a method that would expose a filtered view of the collection. After some digging it looks like I need to implement my own Enumeration class using IEnumerator. Can someone point me to some good code samples on how to achieve this?

I'm using VS.NET 2003

Thanks

I got a mail alert that jmcilhinney replied to my post but I don't see t here :(

I recommended that you implement the IBindingListView interface in another class, which I have done myself to provide sorting and filtering of a typed Collection. I then realised that you're on .NET 1.1 and that interface is new in .NET 2.0, so I deleted my post.

jmcilhinney, thanks for taking time to respond to my post.
Until I find the right way I have added an overloaded GetEnumertor method that takes department code as argument. I then initialise an EmployeeCollection object to which I add the employees who form part of the departmentcode. An the end of the method I return the newEmpCol.GetEnumerator object.
I don't quite like the idea of building another list, I would have thought of something that would have built and returned a virtual list of indexese that match the department code.

Thanks

Building another list is no big deal because you aren't copying the actual objects, just the references to them. That's no different to returning a list of indices as far as resources are concerned.

Thanks, you re-assure me in my design then.