01.connection.Open();
02. OleDbCommand command = new OleDbCommand();
03. command.Connection = connection;
04. string query = "select * from Item ";
05. command.CommandText = query;
06.
07. OleDbDataAdapter da = new OleDbDataAdapter(command);
08. DataTable dt = new DataTable();
09. da.Fill(dt);
10. cbbNameItem.DataSource = dt;
11. cbbNameItem.DisplayMember = "NameThai_Item";
12. cbbNameItem.ValueMember = "ID_Item";
13. connection.Close();
