I'm working on an app with a mainPanel and a couple of popup windows
that do various things.. one of them allows a user to enter search
criteria, and then the grid on the main panel is populated with results.
The other popup allows a user to select options for dropping the data
to a file.
The main app contains the following actionscript code:
###################################################################
public var lookupPeopleCriteria:Object;
private function lookupPeople(criteria:Object):void
{
lookupPeopleCriteria = criteria;
ro.lookupPeople(criteria);
}
public function generateDrop(colNames:Array):void
{
Alert.show(colNames.toString(),'OK',Alert.OK);
Alert.show(lookupPeopleCriteria.toString(),'OK',Alert.OK);
}
###################################################################
lookupPeople() is called when the search criteria window is submitted
and closed.. the criteria is passed in, and then assigned to the
lookupPeopleCriteria variable. The remote service runs fine and the
grid is populated.
When I open my drop options window, and choose my options, and
submit/close that window, it callls the generateDrop() function and
passes in some column names in an array.
the first alert works fine, but the second does not, and generates the
following error
TypeError: Error #1009: Cannot access a property or method of a null
object reference.
at DropOptionsWindow/::generateDrop()
at DropOptionsWindow/__btnGenerateDrop_click()
I think the problem here is that I don't fully understand how scoping
works. I thought that declaring the lookupPeopleCriteria object outside
of the function as a public variable would cause it to be accessible and
to remain in memory even after the lookupPeople() function call is
completed, but apparently, that is not the case.
Rick
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