How do I save xls files from disk to an sql database and from a sqldatabase to file

procedure TForm1.BitBtn1Click(Sender: TObject);
Var
  OleContainer : TOleContainer;
  MStream : TMemoryStream;
  FStream : TFileStream;
  Doc: TStream;
  FileName : String;
begin
  if OpenDialog1.Execute then
  begin
    Doc := TMemoryStream.Create;
    Try
      If SameText(ExtractFileExt(OpenDialog1.FileName),'.PDF') then
      begin
        FStream := TFileStream.Create(OpenDialog1.FileName,fmOpenRead);
        Try
          //Doc := FStream;
          adsArchief.Append;
          adsArchiefFileName.Value := OpenDialog1.FileName;
          (adsArchief.FieldbyName('FileStream') as TBlobField).LoadFromStream(FSTream);
          adsArchiefExtension.Value :=  ExtractFileExt(OpenDialog1.FileName);
          adsArchief.Post;
          Finally
          FStream.Free;
         end;
      end
      else
      begin
        OleContainer := TOleContainer.Create(nil);
        Try
         OleContainer.Parent  := Form1;// Assuming there is a form
         OleContainer.visible := False;
         OleContainer.CreateObjectFromFile(OpenDialog1.FileName,False);
         MStream := TMemoryStream.Create;
         Try
          OleContainer.SaveToStream(MStream);
          adsArchief.Append;
          adsArchiefFileName.Value := OpenDialog1.FileName;
          (adsArchief.FieldbyName('FileStream') as TBlobField).LoadFromStream(MStream);
          adsArchiefExtension.Value :=  ExtractFileExt(OpenDialog1.FileName);
          adsArchief.Post;
         Finally
          MStream.Free;
         end;
        Finally
         OleContainer.Free;
        end;
      end;
    Finally
      FreeAndNil(DOC);
    End;
 
  end;
end;
 
procedure TForm1.BitBtn2Click(Sender: TObject);
Var
  OleContainer : TOleContainer;
  MStream : TMemoryStream;
  FStream : TFileStream;
  Doc: TStream;
  FileName : String;
begin
  SaveDialog1.Filter := adsArchiefExtension.Value+'|*'+adsArchiefExtension.Value;
  SaveDialog1.DefaultExt := adsArchiefExtension.Value;
  If  SaveDialog1.Execute then
  begin
    if SameText(adsArchiefExtension.Value,'.PDF') then
    begin
      FStream := TFileStream.Create(SaveDialog1.Filename,fmCreate);
      Try
        Doc := adsArchief.CreateBlobStream(adsArchief.FieldByName('FileStream'),bmRead);
        FStream.CopyFrom(Doc, Doc.Size);
        //FStream.Write;
      Finally
        FStream.Free;
      end;
    end
    else
    begin
        OleContainer := TOleContainer.Create(nil);
        OleContainer.Parent  := Form1;// Assuming there is a form
        OleContainer.visible := False;
        Doc := adsArchief.CreateBlobStream(adsArchief.FieldByName('FileStream'),bmRead);
        Try
          OleContainer.LoadFromStream(Doc);
          OleContainer.OleObject.SaveAsDocument(SaveDialog1.Filename); //SaveAsDocument(SaveDialog1.Filename);
        Finally
          freeAndNil(OleContainer);
          freeAndNil(Doc)
        End;
    end;
  end;
end;

                                  

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