> wbZillower.Navigate( URL );
> Doc := wbZillower.Document as IHTMLDocument2; {***********}
> How can I get wbZillower.Document to be non nil in the procedure below?:
Because Navigate() is asynchronous. You get control back long before the
navigator has loaded the page.
You have to wait until the page is loaded.
Before accessing the document, do something like this:
while wbZillower.ReadyState < READYSTATE_INTERACTIVE do
Application.ProcessMessages;
--
[email protected]
The author of the freeware multi-tier middleware MidWare
The author of the freeware Internet Component Suite (ICS)
http://www.overbyte.be
----- Original Message -----
From: "Rich Cooper" <[email protected]>
To: "'Borland's Delphi Discussion List'" <[email protected]>
Sent: Thursday, February 19, 2009 7:44 PM
Subject: RE: [TWebBrowser] Calling a JavaScript function
Francois et al,
I still have a problem with the line
Doc := wbZillower.Document as IHTMLDocument2; {***********}
In the procedure below because wbZillower.Document is always nil, no matter
What the URL line is.
How can I get wbZillower.Document to be non nil in the procedure below?:
const Header : string = 'http://www.zillow.com/homes/map/';
procedure TfmZillower.buNextClick(Sender: TObject);
var I : Integer;
URL : WideString;
Doc : IHTMLDocument2; // Current HTML document
HTMLWin : IHTMLWindow2; // Parent window of current HTML document
begin
Line := '';
{Get values of each address}
while (not Eof(AdrFile))
do begin
ReadLn(AdrFile,Line);
Line := Trim(Line);
if Line<>''
then begin
for I := 1 to Length(Line) do
if Line[I]=' '
then Line[I]:= '-';
URL := Header+Line+'_rb/';
meZillower.Text := URL;
wbZillower.Navigate( URL );
Doc := wbZillower.Document as IHTMLDocument2; {***********}
if Assigned(Doc)
then begin
HTMLWin := Doc.parentWindow;
if Assigned(HTMLWin)
then begin
try
HTMLWin.execScript( JavaScriptExpression,
'JavaScript');
except on E:Exception do
begin
ShowMessage( 'Javascript execution error: "'
+
JavaScriptExpression + '"');
end;
end;
end;
end;
end;
end;
end;
Sincerely,
Rich Cooper
EnglishLogicKernel.com
Rich AT EnglishLogicKernel DOT com
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf
Of Francois Piette
Sent: Wednesday, February 18, 2009 12:41 AM
To: Borland's Delphi Discussion List
Subject: Re: [TWebBrowser] Calling a JavaScript function
>What unit has to be in the "uses" clause to define the two vars:
> Doc : IHTMLDocument2; // Current HTML document
> HTMLWin : IHTMLWindow2; // Parent window of current HTML document
You need MSHTML, SHDocVw and ActiveX.
--
[email protected]
Author of ICS (Internet Component Suite, freeware)
Author of MidWare (Multi-tier framework, freeware)
http://www.overbyte.be
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf
Of Francois Piette
Sent: Monday, February 16, 2009 7:25 AM
To: Borland's Delphi Discussion List
Subject: Re: [TWebBrowser] Calling a JavaScript function
> I have the following problem: Having a web page loaded into a TWebBrowser
> hosted in my Delphi application, I want to have Delphi code execute a
> JavaScript function embedded in the HTML page. How can I do that ?
Answering my own question:
procedure WB_ExecScript(WebBrowser: TWebBrowser; JavaScriptExpression :
String);
var
Doc : IHTMLDocument2; // Current HTML document
HTMLWin : IHTMLWindow2; // Parent window of current HTML document
begin
Doc := WebBrowser.Document as IHTMLDocument2;
if Assigned(Doc) then begin
HTMLWin := Doc.parentWindow;
if Assigned(HTMLWin) then begin
try
HTMLWin.execScript(JavaScriptExpression, 'JavaScript');
except
on E:Exception do begin
ShowMessage('Erreur d''exécution JavaScript de "' +
JavaScriptExpression + '"');
end;
end;
end;
end;
end;
--
[email protected]
Author of ICS (Internet Component Suite, freeware)
Author of MidWare (Multi-tier framework, freeware)
http://www.overbyte.be
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