Pascal (Lazarus/Delphi)

Update an XML Attribute

See more XML Examples

Demonstrates how to update XML attributes.

The output XML is this:

<abc b="pear" c="orange" a="130">Test</abc>

Pascal (Lazarus/Delphi)

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.Xml;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  xml: TXml;

begin
  success := False;

  xml := TXml.Create;

  success := xml.LoadXml('<abc a="123" b="apple">Test</abc>');

  //  The UpdateAttribute and AddOrUpdateAttribute methods
  //  are identical.  Both will replace the attribute's value if it
  //  already exists, or insert a new attribute if it does not yet exist.

  //  Change the value of attribute "b" to "pear".
  success := xml.UpdateAttribute('b','pear');

  //  Because no attribute named "c" exists, UpdateAttribute
  //  will create it:
  success := xml.UpdateAttribute('c','orange');

  //  If an attribute's value is an integer, the AddToAttribute
  //  method may be called to update it by adding an integer value.
  //  For example, update the value of "a" to "130" by adding 7.
  xml.AddToAttribute('a',7);

  //  Examine the result:
  WriteLn(xml.GetXml());


  xml.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.