(Delphi ActiveX) Enter/Leave Context in Logging

Demonstrates EnterContext and LeaveContext using the Chilkat Log API.

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
log: TChilkatLog;

begin
log := TChilkatLog.Create(Self);

// Initialize the log object with an initial context tag:
log.Clear('myLog');

// Add some information..
log.LogInfo('Hello, I''m here...');

// Open a sub-context
log.EnterContext('abc');

// New information is now logged within the "abc" context.
log.LogInfo('This is inside the abc context');
log.LogError('File not found.');

// Perhaps open a new context...
log.EnterContext('fileInfo');
log.LogData('filename','something.txt');
log.LogData('path','/somedir/xyz');
log.LeaveContext();

// Close the "abc" context.
log.LeaveContext();

// Examine the content of the log:
Memo1.Lines.Add(log.LastErrorText);

// This is the output:

// myLog:
//   Hello, I'm here...
//   abc:
//     This is inside the abc context
//     File not found.
//     fileInfo:
//       filename: something.txt
//       path: /somedir/xyz
//     --fileInfo
//   --abc
// --myLog
end;