Descriptor (TQueryExecuteTask)

property Descriptor:TfwxmlDocument;

//Function CreateDescriptor():TxmlDocument;
var itr,itqs,itq,itt,itcs,itc,itu,itvs,itv,itas:TxmlItem;
begin
  Result := TxmlDocument.Create(nil); 
  itr  := TxmlItem.Create(Result); 
  itr.ItemName := 'root';
 
  // Add a main query
  // main is the default query name
  //
  itqs := itr.AddItem('queries');
  itq  := itqs.AddItem('query'); 
  itq.AddItems(['QueryName','ClassName'],['main','WfClasseA']); 
 
  // Filtering 
  //
  itq.AddItemText('Filter','(unBool=%1)'); 
  itas := itq.AddItem('Args');
  itas.AddItemSerializedVariant('Arg',True); // serializedValue for boolean true
 
  // Output
  // 
  itt := itr.addItem('output');  
  itt.AddItemText('ExportColumns','true'); 
 
  // Columns 
  //
  itcs := itt.AddItem('columns');
  // 
  itc := itcs.AddItem('column');
  itc.AddItems(['PropName','Title'],['unCode','Code']); 
  // 
  itc := itcs.AddItem('column');
  itc.AddItems(['PropName','Title'],['unBool','Boolean']); 
 
  // Translate value list
  //
  itvs := itc.AddItem('values');
 
  itv := itvs.AddItem('value');
  itv.AddAttribute('oldValue','N');
  itv.AddAttribute('newValue','false');
  // 
  itv := itvs.AddItem('value');
  itv.AddAttribute('oldValue','O');
  itv.AddAttribute('newValue','true');
 
  itc := itcs.AddItem('column');
  itc.AddItems(['PropName','Title'],['unCompteur','Compteur']); 
 
  itc := itcs.AddItem('column');
  itc.AddItems(['PropName','Title'],['unEntier','Entier']); 
 
  itc := itcs.AddItem('column');
  itc.AddItems(['PropName','Title'],['unEtat','Enuméré']); 
 
  itc := itcs.AddItem('column');
  itc.AddItems(['PropName','Title'],['unDouble','Double']); 
 
  // Define which exporter to used
  // CSV for excel csv format
  //
  itu := itr.AddItem('exporter'); 
  itu.AddItems(['ClassName'],['TCSVExporter']);
end;

//Procedure Test;
var qbe:TQueryExecuteTask; doc:TxmlDocument;
begin
  qbe := TQueryExecuteTask.Create;
 
  doc := CreateDescriptor();
  AStr := doc.SaveToString;
 
  // Do not create the descriptor directly inside the Descriptor.document
  // instead, use an intermediate document.
  // This will recreate the document with the correct internal item classes
  //
  qbe.Descriptor.Document.LoadFromString(AStr);
 
  ...
end;