Problema con NPgSQL Urgente!

[laureano59]

El tipo de Dato es bytea (Lo utilizo para almacenar una huella dactilar)

Este es el codigo para que se entienda un poco lo que necesito :

da.InsertCommand = New System.Data.Odbc.OdbcCommand("INSERT INTO persona (huella1,id_tip_pers,id_depa) Values(?,1,1)", conex)
da.InsertCommand.CommandType = CommandType.Text
da.InsertCommand.Parameters.Add("@huella", System.Data.Odbc.OdbcType.Binary, template.Size, "huella1")

' Open connection
conex.Open()

' Fill DataSet.
Dim ds As DataSet = New DataSet
da.Fill(ds, "persona")

' Add a new row.
Dim foo As Byte()

' Create parameter for ? contained in the SQL statement.
Dim newRow As DataRow = ds.Tables("persona").NewRow()
newRow("huella1") = template.tpt
ds.Tables("persona").Rows.Add(newRow)

' Include an event to fill in the Autonumber value.

AddHandler da.RowUpdated, New System.Data.Odbc.OdbcRowUpdatedEventHandler(Addres sOf OnRowUpdated)


' Update DataSet.

Try
da.Update(ds, "persona")
Catch ex As Exception

End Try

conex.Close()

' return ID
'Return 1 'newRow("ID")

'---------Retorno ID Autonumrico---------'
Dim con As New ModeloConexion.ctrConexion
Dim StrSelec As String
StrSelec = "SELECT MAX(id) FROM persona"
Dim dsAuto As DataSet
dsAuto = con.dsLoadGrid(StrSelec, "persona")
Return dsAuto.Tables("persona").Rows(0).Item(0)