(Delphi DLL) Enter/Leave Context in Logging

Demonstrates EnterContext and LeaveContext using the Chilkat Log API.

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

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

...

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

begin
log := CkLog_Create();

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

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

// Open a sub-context
CkLog_EnterContext(log,'abc');

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

// Perhaps open a new context...
CkLog_EnterContext(log,'fileInfo');
CkLog_LogData(log,'filename','something.txt');
CkLog_LogData(log,'path','/somedir/xyz');
CkLog_LeaveContext(log);

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

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

// 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

CkLog_Dispose(log);

end;