Cannot Access A Disposed Object Sql Server
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There is a possible race condition, where the Form can be disposed after your check and before the invoked action is executed. We're a friendly computing community, bustling with knowledgeable members to help solve your tech questions. Also, the exception does not always get thrown, supposedly only when the timer happens to fire whilst the program is exiting. I havnt really seen an answer yet, like the one farther below, in any of the threads that addresses the fundemental problem which cant be completely solved by preemptive testing or
Cannot Access A Disposed Object Sql Server
Another possible problem is that you're accessing Cursor.Position on the timer thread. In the catch block you could probably just return immediately to the caller seeing as the user interface has already been torn down. There is a timer on the form that updates the schedule on the screen every few minutes. Doesn't matter the values change after I check them.
Cheers –Ctrl_Alt_Defeat Aug 9 '11 at 8:43 @CollyMcK: I have extended my answer. I would also echo Dave Sexton's suggestion of stopping the worker threads before the form is disposed of. River Crossing Puzzle Are “la malplej juna” and “la plej maljuna” entirely interchangeable? http://stackoverflow.com/questions/24451128/invoke-causes-cannot-access-a-disposed-object What crime would be illegal to uncover in medieval Europe?
It's a rabbit-hole. Cannot Access A Disposed Object C++ Not the answer you're looking for? Join them; it only takes a minute: Sign up Problems solving “Cannot access disposed object.” exception up vote 9 down vote favorite 1 In my current project there is a Form If I were to close the form in the middle of the Timer_Elapsed() event, the timer would immediately get disposed by the Form_Closing() event.
Cannot Access A Disposed Object Object Name Form1 C#
This doesn't fix the race condition, but is something to keep in mind. –TamusJRoyce Jul 16 '13 at 13:38 add a comment| up vote 2 down vote The reality is that http://stackoverflow.com/questions/13161115/cannot-access-a-disposed-object-when-checking-for-isdisposed-and-disposing Polyglot Anagrams Robbers' Thread Will boring a cylinder affect its longevity thereafter? Cannot Access A Disposed Object Sql Server I can >>>> duplicate the problem EVERY single time I try to close the app. Cannot Access A Disposed Object C# What crime would be illegal to uncover in medieval Europe?
share|improve this answer answered Aug 27 '08 at 6:49 Gishu 81.7k36180262 11 Checking for IsDisposed will reduce, but not eliminate the problem. check over here share|improve this answer edited Apr 8 '15 at 3:33 answered Aug 27 '08 at 6:48 On Freund 3,77721324 If you have a new question, please ask it by clicking It gets thrown at the Invoke call in the UpdateDistanceLabel method. The disposal of the control would imply that there are no visible portions, and thus no out-of-date visible portions; consequently, the post-condition would be satisfied, and the method should return successfully. Cannot Access A Disposed Object Timer
The reason for this is that if you show a form mode-less (i.e. Why are wavelengths shorter than visible light neglected by new telescopes? Join them; it only takes a minute: Sign up Cannot access a disposed object - How to fix? his comment is here share|improve this answer edited Feb 18 '13 at 21:04 answered Feb 18 '13 at 20:44 bas 5,84942970 Ah!
A solution: The first thing to realize is that the invoke is going to fail, no different than how a (IsHandleCreated) check would have ignored the event. System.objectdisposedexception: Cannot Access A Disposed Object. share|improve this answer answered Oct 31 '12 at 15:19 digaomatias 573317 1 The form is not automatically disposed if it is shown with the ShowDialog method, only if it is So my question: Why does the code posted above fire an exception even though I am checking whether the objects I am accessing are disposed or not?
Exception when app is closing else//this is the thread that owns the control handle OnUpdateGauges(e.PIDResults); } } m_UIGaugeDelegate is a delegate for the OnUpdateGauges method.
Maybe empty the >> queue? >> >> jim >> >> >> >> "Dave Sexton"
I'm guessing (and this is only a guess since I have no access to your code) that the timer is firing while the form is being closed. share|improve this answer answered Mar 15 '12 at 20:08 supercat 43.2k172110 add a comment| up vote 8 down vote One problem is that you are doing the check on the timer Why is looping over find's output bad practice? weblink Any ideas would be greatly appreciated.
You could either put another check for IsDisposed after the WaitOne call, or you could put the WaitOne before the IsDisposed check. If there is a message ahead of the Invoke message that will invalidate the component and its window handle, or that got placed just after any checks you try to perform, UpdateLabels is the function which does the updating of Labels. No, create an account now.
Given that your thread is generating data for a list view, it ought to stop running before the list view disappears. share|improve this answer answered Jun 28 '13 at 15:56 rich 1 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign It still happens a lot. If you spot any mistakes in my logic please point them out.
dispose of the timer beforehand).