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muzle6074

_IENavigate Error

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$IE_Topic = $IE_Links.Item(24)
_IENavigate($IE, $IE_Topic.href)

If the page fails to load and the collection of links is not stored in $IE_Topic then _IENavigate throws an error. How can I prevent executing the _IENavigate from running if there is no collection of links in $IE_Topic?

Regards

--Alex

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I presume the links object is a normal collection object. You could then use the Count property:

if $IE_Links.Count = 0 then
  MsgBox(0,0,'Link count zero!')
endif

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Hi amokoura,

I ran the script and canceled the page load to try replicate the error but this happened:

The requested action with this object has failed.:

If $IE_Links.Count = 0 Then

If $IE_Links.Count ^ ERROR

Code:

$IE_Links = _IELinkGetCollection($IE)
        If $IE_Links.Count = 0 Then
            MsgBox(0, "", "No collection")
        EndIf   
        $IE_Topic = $IE_Links.Item(24)
        _IENavigate($IE, $IE_Topic.href)

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[...]

ERROR

[...]

Code:

$IE_Links = _IELinkGetCollection($IE)
        If $IE_Links.Count = 0 Then
            MsgBox(0, "", "No collection")
        EndIf   
        $IE_Topic = $IE_Links.Item(24)
        _IENavigate($IE, $IE_Topic.href)
OK I guess _IELinkGetCollection failed and didn't return any object at all.

How about checking _IELinkGetCollection's errors (Check out from manual) before using its data.

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From what i recall doing this a while back, when IE fails to load a webpage it finds three links; because of the help links - eg;troubleshoot connection (and then two others)


Instant Lockerz Invite - www.instantlockerzinvite.co.uk

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From what i recall doing this a while back, when IE fails to load a webpage it finds three links; because of the help links - eg;troubleshoot connection (and then two others)

If it's true, the function should return a Collection object. Probably the Count property isn't set then.

As the manual says, using @EXTENDED should also give the link count.

But i don't know, error checking by evaluating the link count sounds tricky. Maybe the page should be checked some other way before going any deeper.

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As mentioned above, see the helpfile for _IELinkGetCollection:

Success: Returns an object collection of all links in the document, @EXTENDED = link count

Failure: Returns 0 and sets @ERROR

So, check @EXTENDED to see if it is > 0, check the return value (what you expect to be a collection) and see if it is 0 instead or is the IsObj check on the return value.

You can also use _IEErrorHandlerRegister() which will trap the COM error and allow your script to continue.

Dale


Free Internet Tools: DebugBar, AutoIt IE Builder, HTTP UDF, MODIV2, IE Developer Toolbar, IEDocMon, Fiddler, HTML Validator, WGet, curl

MSDN docs: InternetExplorer Object, Document Object, Overviews and Tutorials, DHTML Objects, DHTML Events, WinHttpRequest, XmlHttpRequest, Cross-Frame Scripting, Office object model

Automate input type=file (Related)

Alternative to _IECreateEmbedded? better: _IECreatePseudoEmbedded  Better Better?

IE.au3 issues with Vista - Workarounds

SciTe Debug mode - it's magic: #AutoIt3Wrapper_run_debug_mode=Y Doesn't work needs to be ripped out of the troubleshooting lexicon. It means that what you tried did not produce the results you expected. It begs the questions 1) what did you try?, 2) what did you expect? and 3) what happened instead?

Reproducer: a small (the smallest?) piece of stand-alone code that demonstrates your trouble

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From what i recall doing this a while back, when IE fails to load a webpage it finds three links; because of the help links - eg;troubleshoot connection (and then two others)

After some quick testing it does return a small collection of items even if the page does not load.

Thank you Dale I have used the code you suggested to test @extended.

Thank you all for your contribution!

Regards

--Alex

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