Formatting Question

[MrMike]

I'm running into a problem with a datagrid_UpdateCommand event. Basically I
think the problem is related to the fact that I have a Primary key w/datatype
varchar. My code is below, and as you can see I'm trying to retrieve the
value from PKColumn and pass it into a paramater. When this code executes I
get error "Line 1: Incorrect syntax near '?'". My question is: Am I correct
by using the code PKColumn = (e.Item.Cells(2).Text()) to retrieve the value
of this column? Thanks.
Private Sub DataGrid1_UpdateCommand(ByVal source As Object, ByVal e As
System.Web.UI.WebControls.DataGridCommandEventArgs ) Handles
DataGrid1.UpdateCommand

Dim PKColumn As String
PKColumn = (e.Item.Cells(2).Text())
Dim SpecieID As Integer
SpecieID = Integer.Parse(CType(e.Item.Cells(3).Controls(1),
DropDownList).SelectedItem.Value)

Dim updateCommand As New SqlCommand("UPDATE tblLogs SET SpecieID = ?
WHERE (PKColumn = ?)", SqlConnection1)
updateCommand.Parameters.Add("@SpecieID", SqlDbType.VarChar).Value =
SpecieID
updateCommand.Parameters.Add("@PKColumn", SqlDbType.VarChar).Value =
PKColumn
updateCommand.Connection.Open()
updateCommand.ExecuteNonQuery()
'Routine tasks...
DataGrid1.EditItemIndex = -1
Bind()
End Sub