When launching another form from the current form, I use the code below to
determine if the form to be launched is already active and showing. If
form = Nothing, then I instantiate it, otherwise I just set it's properties
and refresh the form.
Problem is: when the form already been shown and closed using it's X button
(sending the form thru it's Closing and Disposed events), and then an
attempt is made to reinstantiate it again, the form is NOT Nothing, and
falls into the Else clause below. This generates an error message"
"Cannot access a disposed objected named "frmRecord" . Object name:
"frmRecord" .
Is this a case of slow garbage collection, and/or is there a way to set a
form to Nothing in the form's Closing or Disposed events?
If frmRecord Is Nothing Then
frmRecord = New frmRecord(intFo rmatID, intRecordID, FormMode.Edit)
frmRecord.Show( )
Else
frmRecord.Mode = FormMode.Edit
frmRecord.Recor dID = intRecordID
frmRecord.FormP aint(intRecordI D)
frmRecord.Show( )
End If
Thanks,
Dean Slindee
3  1439 
"Dean Slindee" <sl*****@charte r.net> schrieb When launching another form from the current form, I use the code
below to determine if the form to be launched is already active and
showing. If form = Nothing, then I instantiate it, otherwise I just
set it's properties and refresh the form.
Problem is: when the form already been shown and closed using it's X
button (sending the form thru it's Closing and Disposed events), and
then an attempt is made to reinstantiate it again, the form is NOT
Nothing, and falls into the Else clause below. This generates an
error message"
"Cannot access a disposed objected named "frmRecord" . Object
name: "frmRecord" .
Is this a case of slow garbage collection, and/or is there a way to
set a form to Nothing in the form's Closing or Disposed events?
Handle the other Form's closed event, and in the event handler, set the
variable = Nothing.
Or:
If frmRecord Is Nothing OrElse frmRecord.IsDis posed Then
frmRecord = New frmRecord(intFo rmatID, intRecordID, FormMode.Edit)
Else
frmRecord.Mode = FormMode.Edit
frmRecord.Recor dID = intRecordID
frmRecord.FormP aint(intRecordI D)
End If
frmRecord.Show( )
frmRecord.activ ate
--
Armin
How to quote and why: http://www.plig.net/nnq/nquote.html http://www.netmeister.org/news/learn2quote.html
this isn't related to the actuall question - however, when I was looking for
isdisposed, it wouldn't show up in the intellisense neither for the form nor
for an object of type 'Control'. ofocurse, it shows up in the object browser
for the Control. am i missing something here?
"Armin Zingler" wrote: "Dean Slindee" <sl*****@charte r.net> schrieb When launching another form from the current form, I use the code
below to determine if the form to be launched is already active and
showing. If form = Nothing, then I instantiate it, otherwise I just
set it's properties and refresh the form.
Problem is: when the form already been shown and closed using it's X
button (sending the form thru it's Closing and Disposed events), and
then an attempt is made to reinstantiate it again, the form is NOT
Nothing, and falls into the Else clause below. This generates an
error message"
"Cannot access a disposed objected named "frmRecord" . Object
name: "frmRecord" .
Is this a case of slow garbage collection, and/or is there a way to
set a form to Nothing in the form's Closing or Disposed events?
Handle the other Form's closed event, and in the event handler, set the
variable = Nothing.
Or:
If frmRecord Is Nothing OrElse frmRecord.IsDis posed Then
frmRecord = New frmRecord(intFo rmatID, intRecordID, FormMode.Edit)
Else
frmRecord.Mode = FormMode.Edit
frmRecord.Recor dID = intRecordID
frmRecord.FormP aint(intRecordI D)
End If
frmRecord.Show( )
frmRecord.activ ate
--
Armin
How to quote and why:
http://www.plig.net/nnq/nquote.html
http://www.netmeister.org/news/learn2quote.html
"ISK" <IS*@discussion s.microsoft.com > schrieb this isn't related to the actuall question - however, when I was
looking for isdisposed, it wouldn't show up in the intellisense
neither for the form nor for an object of type 'Control'. ofocurse,
it shows up in the object browser for the Control. am i missing
something here?
Menu Tools -> Options: Text-Editor -> Basic -> General: uncheck "Hide
advanced members"
--
Armin
How to quote and why: http://www.plig.net/nnq/nquote.html http://www.netmeister.org/news/learn2quote.html This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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