Pascal (Lazarus/Delphi)

CSV Delete Column by Name

Demonstrates the DeleteColumnByName method. 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.Csv,
  Chilkat.StringBuilder;

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

procedure RunDemo;
var
  success: Boolean;
  bCrlf: Boolean;
  sb: TStringBuilder;
  csv: TCsv;

begin
  success := False;

  //  We have the following CSV...

  //  permalink,company,numEmps,category,city,state,fundedDate,raisedAmt,raisedCurrency,round
  //  lifelock,LifeLock,,web,Tempe,AZ,1-May-07,6850000,USD,b
  //  mycityfaces,MyCityFaces,7,web,Scottsdale,AZ,1-Jan-08,50000,USD,seed
  //  flypaper,Flypaper,,web,Phoenix,AZ,1-Feb-08,3000000,USD,a
  //  infusionsoft,Infusionsoft,105,software,Gilbert,AZ,1-Oct-07,9000000,USD,a
  //  gauto,gAuto,4,web,Scottsdale,AZ,1-Jan-08,250000,USD,seed

  bCrlf := True;
  sb := TStringBuilder.Create;
  sb.AppendLine('permalink,company,numEmps,category,city,state,fundedDate,raisedAmt,raisedCurrency,round',bCrlf);
  sb.AppendLine('lifelock,LifeLock,,web,Tempe,AZ,1-May-07,6850000,USD,b',bCrlf);
  sb.AppendLine('mycityfaces,MyCityFaces,7,web,Scottsdale,AZ,1-Jan-08,50000,USD,seed',bCrlf);
  sb.AppendLine('flypaper,Flypaper,,web,Phoenix,AZ,1-Feb-08,3000000,USD,a',bCrlf);
  sb.AppendLine('infusionsoft,Infusionsoft,105,software,Gilbert,AZ,1-Oct-07,9000000,USD,a',bCrlf);
  sb.AppendLine('gauto,gAuto,4,web,Scottsdale,AZ,1-Jan-08,250000,USD,seed',bCrlf);

  csv := TCsv.Create;

  //  Indicate that the 1st line contains column names.
  csv.HasColumnNames := True;
  success := csv.LoadFromString(sb.GetAsString());

  //  Delete the "city" column.
  success := csv.DeleteColumnByName('city');

  WriteLn(csv.SaveToString());

  //  Output is:

  //  permalink,company,numEmps,category,state,fundedDate,raisedAmt,raisedCurrency,round
  //  lifelock,LifeLock,,web,AZ,1-May-07,6850000,USD,b
  //  mycityfaces,MyCityFaces,7,web,AZ,1-Jan-08,50000,USD,seed
  //  flypaper,Flypaper,,web,AZ,1-Feb-08,3000000,USD,a
  //  infusionsoft,Infusionsoft,105,software,AZ,1-Oct-07,9000000,USD,a
  //  gauto,gAuto,4,web,AZ,1-Jan-08,250000,USD,seed


  sb.Free;
  csv.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.