what am I doing wrong?

Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged
OleDbConnection1.Open()
OleDbDataAdapter1.SelectCommand.CommandText = "SELECT Location, HotelID FROM Hotel"
OleDbDataAdapter1.SelectCommand.ExecuteNonQuery()
Do

ComboBox1.Items.Add(OleDbDataAdapter1.SelectCommand.CommandText)

Loop
OleDbConnection1.Close()
End Sub