[marcoszorrilla]

Prueba con esto:

How to save a QuickReport custom preview to text?
Add QREXTRA to your uses clause and use the following code:

Código Delphi [-]
  
  procedure TFPreview.ToolButton3Click(Sender: TObject);
 begin 
   FReport.QuickRep1.ExportToFilter (TQRAsciiExportFilter.Create('c:\report.txt'));
 end;

Un Saludo.