C# Error Cannot Access A Disposed Object
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them; it only takes a minute: Sign up What could be causing a “Cannot access a disposed object” error in WCF? up vote 5 down vote favorite I am using the following code: private WSHttpBinding ws; private EndpointAddress Srv_Login_EndPoint; private ChannelFactory
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Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Cannot access http://stackoverflow.com/questions/4573526/what-could-be-causing-a-cannot-access-a-disposed-object-error-in-wcf a disposed object error up vote 9 down vote favorite 5 I am getting the error message Cannot access a disposed object. Object name: 'ApplicationProperties'. when I tryo to re-open a form after closing it. I have noticed this is from exiting forms, and exiting is "Disposing" of them, so I have put the following code in all of my accept buttons, and cancel http://stackoverflow.com/questions/18021972/cannot-access-a-disposed-object-error buttons (any button that closes a form). this.Hide(); this.Parent = null; This code is just hiding the form. Not closing the form. So what my problem is, is that when I click the 'x' button on the form, then try to re-open the form I still get the error message. I have tried a couple differnet ways to modify the exiting funciton of the form such as: private void ApplicationProperties_FormClosing(object sender, FormClosingEventArgs e) { //Hiding the window, because closing it makes the window unaccessible. this.Hide(); this.Parent = null; } But this has brought me no luck. I was wondering if anyone knows how to solve this problem. Here is the code that is working for me inside my cancel and accept buttons. It is the same for all of my buttons that close forms. private void OptionsCancelbtn_Click(object sender, EventArgs e) { //Hiding the window, because closing it makes the window unaccessible. this.Hide(); this.Parent = null; } I have declared the instance at the top of my class on form1, and have a button inside form1 that opens form2. public partial class MainBox : Form { //Making a name for t
SQL Server 2014 Express resources Windows Server 2012 resources Programs MSDN subscriptions Overview Benefits Administrators Students Microsoft Imagine Microsoft Student Partners ISV Startups TechRewards Events Community Magazine Forums Blogs Channel 9 Documentation APIs and reference Dev centers Retired content Samples We’re sorry. The content you requested has been removed. You’ll be auto redirected https://social.msdn.microsoft.com/Forums/en-US/d900d596-8353-4ba4-be16-e9761a84003f/cannot-access-a-disposed-object?forum=vbgeneral in 1 second. Ask a question Quick access Forums home Browse forums users FAQ Search related threads Remove From My Forums Answered by: Cannot access a disposed object Visual Studio Languages , .NET Framework > Visual Basic Question 0 Sign http://www.truevision3d.com/forums/tv3d_sdk_63/c_error_on_close_cannot_access_disposed_object_form1-t10705.0.html;wap2= in to vote i found an error - cannot access a disposed object in my project. i using vs2005. but before this, i using vs2003 and this error doesn't occur. but when i convert to vs2005 and debug, this error cannot access occured. any one know what this happen? please advice.......... Thanks 1st Wednesday, April 18, 2007 1:52 AM Reply | Quote Answers 1 Sign in to vote Determine the object that throws the exception during debug, then step through the code from the begining while watching that object. Find the code that calls Dispose(), or causes Dispose() to be called, on the object. This is what must be modified to prevent the object from being disposed. Or, if you cannot access a don't need a previous instance of the object, reinitialize it right before the line that throws the exception e.g. Object = New Object -EDIT- Also be sure that it isn't part of a conversion error (check the upgrade log file). You may need to make a modification to the original 03 code before converting to 05. Wednesday, April 18, 2007 2:33 AM Reply | Quote Moderator 0 Sign in to vote Once the form has been disposed it must be reinitialized before it can be used in any way. The call to oForm.Close() will cause Dispose() to be called on the form. The second call to oForm.Dispose() is not necessary. After calling Close() on the form, you must create an instance of a new form before you can use it again: Code Snippet Dim oForm As New Form oForm.Show() oForm.Close() oForm = New Form oForm.Show() The form object happens to have a special Close() method and this method calls Dispose(). Many other objects also have a Dispose() method that is used for cleanup purposes, but most do not have a Close() or equivelent method. In these objects it is necessary to call Dispose() explicitly when you are finished with the object. In the case of the Form, calling Close() does the cleanup so you don't need to call Dispose(). Wednesday, April 18, 2007 3:03 PM Reply | Quote Moderator 0 Sign in to vote Hi Khin,If you pla
form. I based my form on the tutorials which have the same issue. Any suggestions?Thanks. Craigomatic: I had the same issue, very nearly went crazy trying to work out what the issue was, in the end i couldnt work it out, so i put a try catch block around Application.Run in Main, thus preventing the error message being shown.Not the ideal solution i know, but best i could find. Rynus_Rein: It's already closed and pulled out of the memory when you try to close it.try something likeif (form == nothing) {} else { form.close();}(don't know how it's done in C#, in vb.net:If Form1 Is Nothing ThenElseEnd If) Jon_b: Rynus is right, as a matter of fact, don't call form.close in the frmclose method.What I have there is : Game.DoGameLoop = false; since the form is already closing at that point, I just terminate the game loop and allow my cleanup routine to run. louddragon: I am not calling form.Close() anywhere, so it must be something internally in TV. Navigation [0] Message Index [#] Next page