' ########################################################################################
' Microsoft Windows
' Contents: ADO - Transaction example
' Compiler: FreeBasic 32 & 64 bit
' Demonstrates the use of transactions.
' Note: Error checking ommited for brevity.
' Copyright (c) 2016 José Roca. Freeware. Use at your own risk.
' THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER
' EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF
' MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR PURPOSE.
' ########################################################################################

'#CONSOLE ON
#define UNICODE
#include "Afx/CADODB/CADODB.inc"
USING Afx

' // Open the connection
DIM pConnection AS CAdoConnection
pConnection.Open "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=biblio.mdb"

' // Open the recordset
DIM pRecordset AS CAdoRecordset
DIM cvSource AS CVAR = "SELECT * FROM Authors"
pRecordset.Open(cvSource, pConnection, adOpenKeyset, adLockOptimistic, adCmdText)

' // Begin a transaction
pConnection.BeginTrans
' // Parse the recordset
DO
   ' // While not at the end of the recordset...
   IF pRecordset.EOF THEN EXIT DO
   ' // Get the content of the "Author" column
   DIM cvRes AS CVAR = pRecordset.Collect("Year Born")
   IF cvRes.ValInt = 1947 THEN pRecordset.Collect("Year Born") = 1900
   ' // Fetch the next row
   IF pRecordset.MoveNext <> S_OK THEN EXIT DO
LOOP
' // Commit the transaction
'pConnection.CommitTrans
' // Rollback the transaction because this is a demo
pConnection.RollbackTrans

PRINT
PRINT "Press any key..."
SLEEP
