ascendente y descendente

[mjesus20]

hola tengo el siguiente codigo para ordenar mi datagrid de forma ascendente y descendente pero quisiera saber que debo poner en la linea que esta marcada en negrita despues del =

Sub orden(ByVal source As Object, ByVal e As System.Web.UI.WebControls.DataGridSortCommandEvent Args)
Dim dv As New System.Data.DataView()
Dim strorden As String
dv.table=
If viewstate("vcolumna") = e.SortExpression Then
If viewstate("vorden") = "ASC" Then
dv.Sort = e.SortExpression & " " & "DESC"

viewstate("vorden") = "DESC"
Else
dv.Sort = e.SortExpression & " " & "ASC"

viewstate("vorden") = "ASC"
End If
Else
viewstate("vcolumna") = e.SortExpression
dv.Sort = e.SortExpression & " " & "ASC"
viewstate("vorden") = "ASC"
End If
DataGrid1.DataSource = dv
DataGrid1.DataBind()

End Sub