sorting a datagrid Ascending, descending

[davidrobin]

I want to sort datagrid columns ascending or descending. They always sort ascending.

How can I do descending.

This is the code I have in the Sort Command event.

Private Sub dgrResults_SortCommand1(ByVal source As Object, ByVal e As _
System.Web.UI.WebControls.DataGridSortCommandEventArgs) Handles dgrResults.SortCommand
 
        Dim dstStudents As DataSet = PopulateGrid()
 
        ' Create a DataView from the Dataset.
        Dim dvwStudents As New DataView(dstStudents.Tables(0))
        Try
 
            ' The DataView provides an easy way to sort. Simply set the
            ' Sort property with the name of the field to sort by.
            dvwStudents.Sort = e.SortExpression
 
            ' Rebind the data source and specify that it should be sorted
            ' by the field specified in the SortExpression property.
 
            dgrResults.DataSource = dvwStudents
            dgrResults.DataBind()
        Catch ex As Exception
            Response.Redirect(clsLib.RedirectTo(ex.Message, "Search.aspx"))
        End Try
 
    End Sub

The PopulateGrid function returns a dataset of data.