Delphi TQuery save to csv file

Question

I want to export content of a TQuery to a CSV file without using a 3d part component(Delphi 7). From my knowledge this can not be accomplished with Delphi standard components.

Answer 1

This is like the Rob McDonell solution but with some enhancements: header, escape chars, enclosure only when required, and ";" separator. You can easily disable this enhancements if not required.

procedure SaveToCSV(DataSet: TDataSet; FileName: String);
const
  Delimiter: Char = ';'; // In order to be automatically recognized in Microsoft Excel use ";", not ","
  Enclosure: Char = '"';
var
  List: TStringList;
  S: String;
  I: Integer;
  function EscapeString(s: string): string;
  var
    i: Integer;
  begin
    Result := StringReplace(s,Enclosure,Enclosure+Enclosure,[rfReplaceAll]);
    if (Pos(Delimiter,s) > 0) OR (Pos(Enclosure,s) > 0) then  // Comment this line for enclosure in every fields
        Result := Enclosure+Result+Enclosure;
  end;
  procedure AddHeader;
  var
    I: Integer;
  begin
    S := '';
    for I := 0 to DataSet.FieldCount - 1 do begin
      if S > '' then
        S := S + Delimiter;
      S := S + EscapeString(DataSet.Fields[I].FieldName);
    end;
    List.Add(S);
  end;
  procedure AddRecord;
  var
    I: Integer;
  begin
    S := '';
    for I := 0 to DataSet.FieldCount - 1 do begin
      if S > '' then
        S := S + Delimiter;
      S := S + EscapeString(DataSet.Fields[I].AsString);
    end;
    List.Add(S);
  end;
begin
  List := TStringList.Create;
  try
    DataSet.DisableControls;
    DataSet.First;
    AddHeader;  // Comment if header not required
    while not DataSet.Eof do begin
      AddRecord;
      DataSet.Next;
    end;
  finally
    List.SaveToFile(FileName);
    DataSet.First;
    DataSet.EnableControls;
    List.Free;
  end;
end;