Custom Paging w/ custom filter

[Justin Heath]

I have a grid where I am using a stored proc in NeedsDataSource to populate the grid - the stored proc has support for custom paging, sorting and filtering. 

The paging and sorting appear to work perfectly on their own, however, when combined with filtering I have an issue.  The initial filter works as expected by hooking into the ItemCommand event:

Protected Sub rgPromos_ItemCommand(ByVal source As Object, ByVal e As GridCommandEventArgs) Handles rgPromos.ItemCommand
        If e.CommandName = RadGrid.FilterCommandName Then
            Dim filterPair As Pair = CType(e.CommandArgument, Pair)
            Dim colName As String = filterPair.Second.ToString()

            If colName = "PromotionCode" Then
                Dim tbPattern As TextBox = CType((CType(e.Item, GridFilteringItem))(colName).Controls(0), TextBox)
                PromoCodeFilter = tbPattern.Text
                PromoCodeFilterOperator = filterPair.First.ToString()
                rgPromos.Rebind()
            End If
End Sub

PromoCodeFilter and PromoCodeFilterOperator are properties I use to store the information from the filter - I then pass these values into my stored proc and everything is right in the world.  

The problem is after that initial filter, if I change the grid page the filter values aren't properly passed into the stored procedure.  I assume that on the paging event or something I need to check to see if any filters had already been applied.  Can anyone point me in the right direction? 

[Justin Heath]

Okay, this was pretty simple to fix by just storing the data in viewstate rather than in page variables - hope this helps someone else in the future!