Change the sorting field within groups on runtime

Hi. I'm using VS.net 2008 and CR 2008, and I've been trying to change the sorting field within a group during runtime. Here is the code I'm trying:

Code:

---

        Dim myReport As New ReportDocument
        Dim fielddef As FieldDefinition

        fielddef = myReport.Database.Tables.Item(0).Fields.Item("startnummer")
        myReport.DataDefinition.SortFields.Item(0).Field = fielddef

---

But it only changes the grouping, and I don't want to change that. Is it impossible to change the sorting field without affecting the grouping?

Hope you understand my problem, and thanks for all the help :)

I think you have to clear the existing sort order first. It is something like

vb Code:

myReport.DataDefinition.SortFields.clear

then specify the new sort order using AddItem or some other method

A Group is a SortField.

Loop through all the SortFields checking the SortFieldType for a RecordSortField. If you don't find one, add a new SortField. If you do modify it's FieldDefinition.

Thanks a lot Bruce! I made it work with this code:

Code:

---

        fielddef = myReport.Database.Tables.Item(0).Fields.Item("startnummer")

        For Each SortField In myReport.DataDefinition.SortFields
            If SortField.SortType = SortFieldType.RecordSortField Then
                SortField.Field = fielddef
            End If
        Next

---

But this code works only if it finds a RecordSortField. How do I add a new SortField if it can't find a RecordSortField?