[RESOLVED] GridView's sort function

[thatzlim]

Hi, I'm trying to do this:

I am working on web app project. I'm using visual studio 2005, .net framework 2.0.

On Business Logic Layer (BLL), I stored the sql query result in UserCollection (UserCollection is a collection of User object which inherits the generic Collection class, User object is a class defined by me). Then passing this UserCollection to Presentation Layer.

On Presentation Layer, I bind this UserCollection to a GridView. I enabled Sorting on GridView. I defined the SortExpression for the column that I want to sort via GridView's SmartTag.

My question is, when I run the application, clicking on the GridView's column header, it will not sort the result. Why is it so? How can I make it able to sort?

Kindly advice in details. Thank you!!!