Avoiding Listview Duplicates

[Tddupre]

I am populating the list view using mysql and i dont know how to avoid duplicate rows.

 Private Sub Btnrefresh_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Btnrefresh.Click


        Using connection As New MySqlConnection(";")

            Using command As New MySqlCommand("SELECT Distinct  name, type, uploaded, uploader, location FROM programs", connection)

                connection.Open()



                Using reader As MySqlDataReader = command.ExecuteReader()

                    While (reader.Read())
                        Dim name As String = reader("name")
                        Dim type As String = reader("type")
                        Dim uploaded As String = reader("uploaded")
                        Dim uploader As String = reader("uploader")
                        Dim location As String = reader("location")

                        Dim lv As ListViewItem = ListView1.Items.Add(location)


                        lv.SubItems.Add(name)

                        lv.SubItems.Add(type)

                        lv.SubItems.Add(uploaded)
                        lv.SubItems.Add(uploader)

                    End While

                End Using

            End Using

        End Using

    End Sub