Question

is it possible to save entire document loaded in Webbrowser (in Delphi) as a ordinary HTML file with new values (I mean values entered by user in html’s forms this document)?
I need this for reading this HTML document with all values next time when application will be used.

Answer 1

Sure this is possible!

Small demo App, make a new vcl forms application, drop a TWebBrowser, a TButton and a TMemo on your form and use this code (don’t forget to bind OnCreate for the Form and OnClick for the Button)

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, OleCtrls, SHDocVw, StdCtrls,mshtml, ActiveX;

type
  TForm1 = class(TForm)
    WebBrowser1: TWebBrowser;
    Button1: TButton;
    Memo1: TMemo;
    procedure FormCreate(Sender: TObject);
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

//code snagged from about.com
procedure WBLoadHTML(WebBrowser: TWebBrowser; HTMLCode: string) ;
var
   sl: TStringList;
   ms: TMemoryStream;
begin
   WebBrowser.Navigate('about:blank') ;
   while WebBrowser.ReadyState < READYSTATE_INTERACTIVE do
    Application.ProcessMessages;

   if Assigned(WebBrowser.Document) then
   begin
     sl := TStringList.Create;
     try
       ms := TMemoryStream.Create;
       try
         sl.Text := HTMLCode;
         sl.SaveToStream(ms) ;
         ms.Seek(0, 0) ;
         (WebBrowser.Document as IPersistStreamInit).Load(TStreamAdapter.Create(ms)) ;
       finally
         ms.Free;
       end;
     finally
       sl.Free;
     end;
   end;
end;

procedure TForm1.Button1Click(Sender: TObject);

var
  Doc : IHtmlDocument2;

begin
 Doc := WebBrowser1.Document as IHtmlDocument2;
 Memo1.Lines.Text := Doc.body.innerHTML;
end;

procedure TForm1.FormCreate(Sender: TObject);

var
  Html : String;
begin
 Html := 'change value of input and press Button1 to changed DOM<br/><input id="myinput" type="text" value="orgval"></input>';
 WBLoadHTML(WebBrowser1, Html);
end;

end.

Output:

EDIT

As mjn pointed out, the values of password type inputs will not be shown.
You can still can get their value though:

add these 2 lines to Button1.Click and change html

OnCreate:

Html := 'change value of input and press Button1 to changed DOM<br/><input id="myinput" type="password" value="orgval"></input>';

OnClick:

El := (Doc as IHtmlDocument3).getElementById('myinput') as IHtmlInputElement;
     Memo1.Lines.Add(Format('value of password field = %s', [El.value]))