Delphi Database, Delphi Components from ComponentAce

Transaction Example

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The following example shows how to use transaction system:

with Archiver do
begin
FileName := 'C:\TEST\test.zip';

// Create a new archive file
OpenArchive(fmCreate);

// Set path to folder with some text files to BaseDir
BaseDir := 'C:\SOURCE_FOLDER';

// Start a transaction
BeginUpdate;

// Add all files and directories from 'C:\SOURCE_FOLDER' to the archive
try
AddFiles('*.*');
except

// If errors occurs rollback transaction. All modifications will be cancelled.
CancelUpdate;

// Close archive and exit current procedure
CloseArchive;
Exit;
end;

// Set path to folder with some HTML files to BaseDir
BaseDir := 'C:\SOURCE_FOLDER1\';

// Add all HTML files from 'C:\SOURCE_FOLDER1' to the archive
try
AddFiles('*.htm?');
except

// If errors occurs rollback transaction. All modifications will be cancelled.
CancelUpdate;

// Close archive and exit current procedure
CloseArchive;
Exit;
end;

// Commit a transaction. All modifications will be saved.
EndUpdate;

// Close the archive
CloseArchive;
end;

Nov 21, 2024