Synching application with browser component navigation 1

[ors]

I am using Delphi 5's Web Browser component to navigate a website.
I need to parse the HTML source of some web pages, but since my code and the web browser do not seem to work in synch, I cannot work on the HTML source immediately after issuing a browser.navigate command.
I tried using sleep / application.processmessages but it did not work.
Any ideas please?

 

[earthandfire]

Can't you use the WebBrowser component's DocumentComplete event to notify you when the page has finished loading?


Hopw this helps.

 

[ors]

Thanks for the help, but my problem is that in each case after triggering browser navigation, I need to do different actions.
Here's a peudo code example.


1) Cycle through grid rows.
2) For each row, navigate to a URL.
3) Parse the new page.
4) Navigate back.
5) Repeat for next row.

My problem is that step 3 takes place before step 2 finishes.
Similarly step 5 starts before step 4 is completed.

Help please.

 

[DelphiAaron]

I found i had to use the WebBrowserDocumentComplete event and ReadyState together.

This is how i download images from a list of url's in a listbox.

1st i have a start button that loads the first url then after that page loads the document complete event kicks in.

TMainForm.WebBrowserDocumentComplete(Sender: TObject;
  const pDisp: IDispatch; var URL: OleVariant);
begin
 If WebBrowser.ReadyState=READYSTATE_COMPLETE then
  begin
   {save image code here}
  end;
 
 URLlistbox.items.Delete(0);
 If URLlistbox.items.Count > 0 then
  {download next url code here}
end;

Aaron

 

[ors]

Thanks for that. I will use it. However my original problem remains in that multiple documentcomplete2 events are triggered for every page. I believe the problem to be some HTML iframe tags. I created a seperate thread to loop and look for document completion, since leaving the loop in the main thread seemed to halt the application and browser.

Further suggestions ar very welcome.