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ozmike

Excel closes program crashes

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How do i detect if excel has EXITED by the user and the excel object is not valid..?

$xl = _ExcelBookOpen( "MY.XLS" )

; user Exits excel..

-------

; HOW TO DETECT xls EXITED?

; this dosen't work???

If IsObj($xl) = false Then

RETURN

ENDIF

_ExcelSheetActivate($xl,"1st Fortnight") ; ERROR

C:\Program Files\AutoIt3\Include\Excel.au3 (1063) : ==> Variable must be of type "Object".:

Local $iTemp = $oExcel.ActiveWorkbook.Sheets.Count

Local $iTemp = $oExcel.ActiveWorkbook^ ERROR

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I'm afraid it would be difficult to check. AutoIt has been passed a reference to the object at creation and any action (method invokation) on this object can be performed only using that reference.

IsObj($var) is returning True if AutoIt sees that $var is an object variant and if the reference is zero. It doesn't know which kind of COM object it is and doesn't have to.

If an object is destroyed outside AutoIt, AutoIt has absolutely no way of being aware of the fact that the reference it knows has suddenly become invalid. Since checking anything w.r.t. the destroyed object has to be made thru the reference and since that reference is now invalid, you see that the situation is deemed to graceless failure.

The best bet is to make sure that objects created by AutoIt will be hidden to users so they don't mess with them. That, or hide PCs to users!


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Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe here
RegExp tutorial: enough to get started
PCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta.

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SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)
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SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt)

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When this error occurs can i trap it? ie does auto have a on error goto

or can i catch the error thrown by the Excel.au? Just curious

Thanks

mike

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I've used something like this

xl = _ExcelBookOpen("MY.XLS")
; get window title for _ExcelBookOpen
$sWkbookTitle = $xl.Application.Caption

; detect xls has been closed
If Not WinExists($sWkbookTitle) Then Return SetError(1, 0, 0)

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That's a possibility, but it's certainly very clumsy to use before every "obj.dosomething".


This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.
Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe here
RegExp tutorial: enough to get started
PCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta.

SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.
SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.
An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.
SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)
A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!
SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt)

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Thank u picaxe , ingenius solution! :(

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