Hi to All,
I found the following issue, is this a bug?
Create a new project and, in the main form, add a listbox with a few sample
items. In the DoubleClick event of the listbox, add:
Me.Dispose()
Then run the project, double click on an item in the listbox to close the
window and then an Exception occurs.
What is the problem? I would like to close the form by double clicking on
the listbox...
Thank you,
Andy
14  3171 
what's the exception?
"Andy" <no****@nospam. com> wrote in message
news:9F******** **************@ news2.tin.it... Hi to All,
I found the following issue, is this a bug?
Create a new project and, in the main form, add a listbox with a few
sample items. In the DoubleClick event of the listbox, add:
Me.Dispose()
Then run the project, double click on an item in the listbox to close the
window and then an Exception occurs.
What is the problem? I would like to close the form by double clicking on
the listbox...
Thank you,
Andy
In article <9F************ **********@news 2.tin.it>, no****@nospam.c om
says... What is the problem? I would like to close the form by double clicking on
the listbox...
Try Me.Close().
--
Patrick Steele
Microsoft .NET MVP http://weblogs.asp.net/psteele
Hi Andy,
You are not closing it, you are killing it, look at the message from Patrick
Cor
Not a bug. Do not Dispose() in a click event. I am not real Windows Forms
savvy, but there is a way to close the form. You can Dispose() afterward,
but you have to make sure there is a Dispose() method coded for the class
you are disposing. Not sure if a form class has a Dispose() method without
adding IDisposable. Either way, you do not want to Dispose() the object in
the object.
--
Gregory A. Beamer
MVP; MCP: +I, SE, SD, DBA
*************** *************** *************** *************** **********
Think Outside the Box!
*************** *************** *************** *************** **********
"Andy" <no****@nospam. com> wrote in message
news:9F******** **************@ news2.tin.it... Hi to All,
I found the following issue, is this a bug?
Create a new project and, in the main form, add a listbox with a few
sample items. In the DoubleClick event of the listbox, add:
Me.Dispose()
Then run the project, double click on an item in the listbox to close the
window and then an Exception occurs.
What is the problem? I would like to close the form by double clicking on
the listbox...
Thank you,
Andy
Something like "Cannot access disposed object named "ListBox"
Andy
"steve" <as*@abc.com> ha scritto nel messaggio
news:vn******** ****@corp.super news.com... what's the exception?
The same Exception happens also with "Me.Close() "...
Andy
"Patrick Steele [MVP]" <pa*****@mvps.o rg> ha scritto nel messaggio
news:MP******** *************** *@msnews.micros oft.com... In article <9F************ **********@news 2.tin.it>, no****@nospam.c om
says... What is the problem? I would like to close the form by double clicking
on the listbox...
Try Me.Close().
But I need to close (unload) the form from a double click event...
I searched with google and, strangely, in the first version of VB6 there was
a bug: if you tried to unload the form from a listbox's doubleclick event, a
GPF occurred. This was solved in later SP. What coincidence!
Andy
"msnews.microso ft.com" <No************ @comcast.netNoS pamM> ha scritto nel
messaggio news:#G******** ******@tk2msftn gp13.phx.gbl... Not a bug. Do not Dispose() in a click event. I am not real Windows Forms
savvy, but there is a way to close the form. You can Dispose() afterward,
but you have to make sure there is a Dispose() method coded for the class
you are disposing. Not sure if a form class has a Dispose() method without
adding IDisposable. Either way, you do not want to Dispose() the object in
the object.
The point I am getting at is Dispose() is not the proper way to destroy an
object from inside the object. I would aim for close, but you are stating
you are getting the same message there. I do not understand the need to
close from doubleclick rather than set up a close button, but each app is
different.
This causes no problems for me in VS.NET 2003:
Private Sub ListBox1_Double Click(ByVal sender As Object, ByVal e As
System.EventArg s) _
Handles ListBox1.Double Click
Try
Me.Close()
Catch ex As Exception
MessageBox.Show (ex.Message)
'Finally
' MessageBox.Show ("In Finally")
End Try
End Sub
unless I uncomment the Finally. This makes sense, as I have closed the form
by this point in time. I cannot run through debug on this machine, as I need
to catch someone to get permissions (aaarrrggghhhh! !!).
--
Gregory A. Beamer
MVP; MCP: +I, SE, SD, DBA
*************** *************** *************** *************** **********
Think Outside the Box!
*************** *************** *************** *************** **********
"Andy" <no****@nospam. com> wrote in message
news:fW******** **************@ news2.tin.it... But I need to close (unload) the form from a double click event...
I searched with google and, strangely, in the first version of VB6 there
was a bug: if you tried to unload the form from a listbox's doubleclick event,
a GPF occurred. This was solved in later SP. What coincidence!
Andy
"msnews.microso ft.com" <No************ @comcast.netNoS pamM> ha scritto nel
messaggio news:#G******** ******@tk2msftn gp13.phx.gbl... Not a bug. Do not Dispose() in a click event. I am not real Windows
Forms savvy, but there is a way to close the form. You can Dispose()
afterward, but you have to make sure there is a Dispose() method coded for the
class you are disposing. Not sure if a form class has a Dispose() method
without adding IDisposable. Either way, you do not want to Dispose() the object
in the object.
Try adding
Application.DoE vents before the close method...
I do'nt know if it will work, but dispose is for garbage collection, and not
the right way to shut down a window. Close calls dispose through Finalize I
believe.
"Andy" <no****@nospam. com> wrote in message
news:QT******** **************@ news2.tin.it... The same Exception happens also with "Me.Close() "...
Andy
"Patrick Steele [MVP]" <pa*****@mvps.o rg> ha scritto nel messaggio
news:MP******** *************** *@msnews.micros oft.com... In article <9F************ **********@news 2.tin.it>, no****@nospam.c om
says... What is the problem? I would like to close the form by double clicking on the listbox...
Try Me.Close().
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