How to restart a loop if there is an @error?

[BrewManNH]

4 minutes ago, Danp2 said:

That code comes from here

That doesn't answer the question, does that code even work? How can you use Execute that way, and why would you in the first place?

[oemript]

_IEErrorNotify(True) is only coding for notification setting, I have tried @error, but Msgbox does not show up, so how to detect not responding properly under this situation?

Sleep(250)
       $jsEval = Execute('$oIE.Document.head.eval')
       if @error then
          MsgBox(64 + 262144, 'Title', 'Error')
       EndIf

Do you have any suggestions?
Thanks, to everyone very much for any suggestions (^v^)

Edited November 3, 2018 by oemript

[Danp2]

@BrewManNH Yes... it works, allowing you to retrieve a reference the the browser's eval function. Original discussion is here.

[oemript]

Do
       Global $oIE = _IECreate($URL, 1)
       ...
       $jsEval = Execute('$oIE.Document.head.eval')
       If $jsEval("typeof jQuery=='undefined'") Then
          MsgBox(64 + 262144, 'Title', 'Error')
       EndIf
   Until IsObj($jsEval)
   
    Do
       Sleep(250)
       MsgBox(64 + 262144, 'Total Vol', '0')
    Until $jsEval("RawSummary.totalVol") <> 0
      MsgBox(64 + 262144, 'Total Vol', 'Pass')

When I test it, and find out the error occur totalVol = 0 on the second loop and it loops forever, problem is solved.
Thanks, to everyone very much for any suggestions (^v^)

Edited November 3, 2018 by oemript

[Danp2]

Your code makes no sense, especially after the last edit. You can't expect to use $jsEval within the Do loop where it is being created.

[oemript]

Code is updated, which need to start from beginning.

Thanks, to everyone very much for suggestions (^v^)

 

[Gianni]

On 3/11/2018 at 2:39 PM, BrewManNH said:

That doesn't answer the question, does that code even work? How can you use Execute that way, and why would you in the first place?

It's a simple and ingenious way to avoid AutoIt crashes in some circumstances.
I saw it used by @genius257 in this post: (https://www.autoitscript.com/forum/topic/185387-value-of-js-variable-in-ie/?do=findComment&comment=1332372) and in the first instance I was also perplexed, but in fact that way can save us from unwanted crashes. (see his explanation here)
for example, if you want to get a reference to a javascript function you can use this code:

$oIE.Document.head.eval

but if the function is not yet available in the javascript environment, the above code causes the script to crash.
By simply putting the code in the Execute () function, the error is not generated.
You can still check if the command was successful by checking if the variable returned by Execute () is an object or not.
In this way you can wait painlessly for the javascript function to be available until the returned variable is an object. Here an example of use:

......
    ; create a reference to the javascript eval() function
    $oIE.document.parentWindow.setTimeout('document.head.eval = eval', 0)
    Do
        Sleep(250)
        $jsEval = Execute('$oIE.Document.head.eval')
    Until IsObj($jsEval)
    .......

 

[Gianni]

On 1/11/2018 at 11:23 PM, oemript said:

Referring to following coding, I would like to set a condition if Do loop last more than 3 minutes, then break Do Loop and ContinueLoop for next For loop, if not, Do Loop would run forever.

For example

1) Processing $x = 3

2) Running Do Loop more than 3 minutes

3) Exit Do Loop

4) Processing $x = 4

for $x = 1 to 5
   ...
   Do
       Sleep(250)
   Until $jsEval("RawSummary.totalVol") <> 0
   ...
Next

Does anyone have any suggestions?
Thanks, to everyone very much for any suggestions (^v^)

 

.... something like this...

for $x = 1 to 5
   $Timer = TimerInit()
   Do
       Sleep(250)
   Until ($jsEval("RawSummary.totalVol") <> 0) Or (TimerDiff($Timer) > 180000 ) ; timeout in 180000ms = 3 minutes
   ...
Next

 

 

On 3/11/2018 at 2:43 PM, oemript said:

_IEErrorNotify(True) is only coding for notification setting, I have tried @error, but Msgbox does not show up, so how to detect not responding properly under this situation?

Sleep(250)
       $jsEval = Execute('$oIE.Document.head.eval')
       if @error then
          MsgBox(64 + 262144, 'Title', 'Error')
       EndIf

Do you have any suggestions?
Thanks, to everyone very much for any suggestions (^v^)

the error will never occur because the Execute() function never arises errors...

check instead if the returned variable is of the type you are expecting or is empty
something similar to this for example...

Sleep(250)
       $jsEval = Execute('$oIE.Document.head.eval')
       if Not IsObj($jsEval) then
          MsgBox(64 + 262144, 'Error', 'eval still unavailable')
       EndIf

 

[BrewManNH]

1 hour ago, Chimp said:

It's a simple and ingenious way to avoid AutoIt crashes in some circumstances.

Thank you for the explanation. It was really strange seeing that piece of code, never saw anything used that way before. Makes more sense now.

[oemript]

On 11/7/2018 at 4:21 AM, Chimp said:

 

Sleep(250)
       $jsEval = Execute('$oIE.Document.head.eval')
       if Not IsObj($jsEval) then
          MsgBox(64 + 262144, 'Error', 'eval still unavailable')
       EndIf

 

I would like to know any different on following 2 conditions for error checking.

If $jsEval("typeof jQuery=='undefined'") Then

If Not IsObj($jsEval) then

Do you have any suggestions?
Thanks, to everyone very much for any suggestions (^v^)

 

Edited November 17, 2018 by oemript