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Invoke Cannot Access A Disposed Object


share|improve this answer edited Aug 27 '08 at 8:53 answered Aug 27 '08 at 6:45 jfs 14.8k125076 add a comment| up vote 8 down vote Looks like a threading issue. This may work: Public Class frmDaftarBarang Private Shared anInstance As frmDaftarBarang Public Shared ReadOnly Property instance() As frmDaftarBarang Get If anInstance Is Nothing OrElse anInstance.IsDisposed Then anInstance = New frmDaftarBarang End What will happen is that you'll get one more tick that you may not be expecting. Read more in this Q&A: What's wrong with using Thread.Abort() What I would do in your situation is replace the while(isDisplayActive) with something like while(colorThingyThreadIsBusy) And set the colorThingyThreadBusy bool to check over here

asked 8 years ago viewed 115261 times active 2 months ago Upcoming Events 2016 Community Moderator Election ends Nov 22 Visit Chat Related 835How to update the GUI from another thread How to decline a postdoc interview if there is some possible future collaboration? Check the flag in the handler and don't run the code if it is set. Why is it disposed? http://stackoverflow.com/questions/9669129/problems-solving-cannot-access-disposed-object-exception

Cannot Access A Disposed Object Sql Server

You are still left with the problem of how many timer handlers will still run after shutting down the timer. xparse processor with multiple arguments Is there a word for being sad about knowing that the things that make you happy will eventually go away C++ calculator using classes What does Just drop a timer component from toolbox i.e. It's less reasonable for the worker thread to try to synchronize with the thread by which it was created, creating a tight coupling between the threads that is less intuitive and

C++ calculator using classes Why usually is the word "halfway" used with "down" rather than "up"? Consequently it will be disposed... Not the answer you're looking for? Cannot Access A Disposed Object Wcf How EXACTLY can +=/-= operators be interpreted?

Why is looping over find's output bad practice? Cannot Access A Disposed Object Object Name Form1 C# Fix the problem, don't shoot the messenger. –Hans Passant Dec 9 '09 at 16:16 I ended up doing something similar to this. Teenage daughter refusing to go to school more hot questions question feed lang-cs about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback The real problem here is that nobugz is correct as he points out that the APIs given for cross-thread calls in winforms are inherently not thread safe.

private void frmLine_Load(object sender, EventArgs e) { txtNumber.Focus(); gvListLine.DataSource = objLineRepository.GetAll().ToList(); } Best regards c# multithreading winforms forms delegates share|improve this question edited Jun 27 '14 at 13:03 asked Jun 27 Cannot Access A Disposed Object C++ So I guess I am doing something wrong. As Italian citizens, what legal documents are we supposed to carry when traveling to Ireland? The code is below - note the commented out .ShowDialog(this); was something i tried - it let me close and open the new forms ok but it did not actually start

Cannot Access A Disposed Object Object Name Form1 C#

What happens when a wizard tries to cast a cone of cold through a wall of fire? http://stackoverflow.com/questions/13161115/cannot-access-a-disposed-object-when-checking-for-isdisposed-and-disposing Should I allow my child to make an alternate meal if they do not like anything served at mealtime? Cannot Access A Disposed Object Sql Server Because this is a component, which you can place on your Form and it will be disposed with other form's components (just drag it from toolbox in designer). Cannot Access A Disposed Object C# What does "there lived here then" mean?

Not the answer you're looking for? http://bestimageweb.com/cannot-access/i-cannot-access-windows.php I can >>>> duplicate the problem EVERY single time I try to close the app. 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. syncContext.Post( (System.Threading.SendOrPostCallback) delegate(object postState) { // The following code executes on the UI thread. Cannot Access A Disposed Object Timer

Are you explicitly calling Dispose on their control? We're a friendly computing community, bustling with knowledgeable members to help solve your tech questions. The desired post-condition is that the control not have any portions that would still need updating. this content What is a satisfactory result of penetration testing assessment?

As Italian citizens, what legal documents are we supposed to carry when traveling to Ireland? System.objectdisposedexception: Cannot Access A Disposed Object. Thanks. If you're using the 2.0 framework I've posted some code that should do the trick.

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Browse other questions tagged c# winforms exception dispose or ask your own question. What does a -4 above the stave mean? The correct solution is to stop the timer before closing the form. –Jesse Weigert Mar 26 '09 at 9:55 add a comment| up vote 2 down vote we do check the Check If Object Is Disposed C# This leads me to ask: are you calling Dispose() on the schedule object manually?

Join them; it only takes a minute: Sign up Unexpected “Cannot access a disposed object” in clean up method up vote 2 down vote favorite 1 I am facing a puzzling share|improve this answer answered Dec 9 '09 at 15:45 oldUser 240212 This won't work. End If End Sub Interesting thing to know, even though it would throw the ObjectDisposedException when attempting to start the timer, the timer would still get started causing it to run have a peek at these guys my project can run very well.

Why is looping over find's output bad practice? Boss sends a birthday message. It's a rabbit-hole. Hypothesis: Maybe you have a main thread and a timer thread accessing this control.

Since the framework doesn't provide any easy way I know of to clear the message pump of those event messages, and since the form does not expose its private property that US Election results 2016: What went wrong with prediction models? The thread however will continue working with that form since it will not stop. 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?

What happens when a wizard tries to cast a cone of cold through a wall of fire? The control can be disposed between your IsDisposed test and the InvokeRequired test. When I close the app I get the following exception: > > System.ObjectDisposedException was unhandled > Message="Cannot access a disposed object.\r\nObject name: 'MainForm'." > Source="System.Windows.Forms" > ObjectName="MainForm" > StackTrace: > at