VS 2010 Cannot Access Disposed Form?
Feb 8, 2012If TextBox1.Text = "Welcome!" Then
MsgBox("Welcome!")
Else
MsgBox("Error!")
Me.Close()
End If
I receive "Cannot access a disposed object (Form1)" when the error arrives.
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Close Form = Cannot Access A Disposed Object Error?
Jul 17, 2010By default my app loads the activation form. On the form load it checks if the license is valid and if so i want it to close/hide the registration form and open the form that starts my app.
When i try to do this it crashes my app with the following error
Quote:
Cannot access a disposed object
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'check if a valid license is available
[Code]....
Opening Form In Design Mode - Cannot Access Disposed Object
Feb 22, 2012When try to open in design mode a form (VB.NET), in which I have a custom UserControl, I see the message from Visual Studio:
Microsoft Visual Studio
The control MyNamespace.MyUserControl has thrown an unhandled exception in the designer and has been disabled.
Exception:
Cannot access a disposed object.
Object name: 'SplitterPanel'.
Stack trace:
OK
And the form is not displayed in designer. What to do?
VS 2010 Difficulty Accessing 'disposed' Form?
Jan 18, 2012I'm having a strange difficulty. Here is the order of events:User presses button on form1 New Form object is created for from 2 New form object '.show' command is fired Form 2 opens correctly In the Load Event of Form 2, the form attempts to do various things in a try, catch, finally clause On catch, I close form2 down '.close' as it cannot be used as something has gone wrong with the execution However, my problem is this. It is acceptable for things to go wrong on the from 2 load event which is why I have implemented the try - catch functionality. However, when I close the form2 down as a result of the problem, a real error ocurrs 'Cannot access a disposed object' and the VB IDE refers me to Form1's '.show' event for Form2.
It is almost as if the form hasn't fully 'shown' before I am closing it down. Does anyone have any idea what the problem is here? Do I need to close down Form2 ourside of it's Load event handler so that Form1 thinks it has loaded correctly?
Hiding A Form Produces "Cannot Access Disposed Object" Exception
Apr 12, 2011I am trying to write a program that takes the input of a CSV file, makes modifications, and prompts the user on how to handle certain modifications.
I have the parsing of the CSV file complete, the handling of most of the string manipulation down, and the user interface complete, except when it comes time to move onto the next record.
I had it display the form as a modal dialog, and used me.hide() once it was over to continue with the program. However, when it gets to the next ShowDialog(), it says that the object has been disposed! I've tried a modeless dialog, with a while loop that waits for a boolean to be flipped by a button on the dialog being clicked, but that, as predicted, did not turn out so well and just shot the processor load to 100%.
One thing I notice in looking around is that I have everything based on the "home" form, the initial one that comes up when the program is run. Is this incorrect coding? Does this require the prompt being on a child form?
C# - Cannot Access A Disposed Object
Feb 10, 2011i am facing a huge problem with the "Cannot access a disposed object. Object name: 'TreeView'." error.
On a windows forms of mine i use a custom windows explorer object.
And here come the code parts...
On the selected node event, i load the images found within the selected directory to the FlowLayoutPanel.
Private Sub ExpTree1_ExpTreeNodeSelected(ByVal SelPath As String, ByVal Item As ExplorerControls.CShItem) Handles ExpTree1.ExpTreeNodeSelected
'Loop until all images are loaded.
LoadImagesToFlowPreviewPanel()
[Code]....
Cannot Access A Disposed Object
Apr 18, 2007I 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 occured.
Cannot Access Disposed Object.NET
Mar 26, 2009I have a windows form in .NET that will serve as a wizard to achieve something. This contains 3 steps: Step1, Step2, Step3.
Each step is again actually a user control. Main form contains a panel that display the current Step. When I change among steps then:
1) Dispose the current user control by calling its Dispose() method.
2) Clears the main form panel
3) Initialize the user control of next step and add it into the main panel
Now, the issue is, User control of step one contains one more user control. When I change to another step and come back to step 1, I get following error:
"Cannot access disposed object."
Because I have to first dispose the user control before actually displaying the another step. And when I come back to step 1 and tries to open the user control on step 1, it gives the aforementioned error.
Cannot Access Disposed Object - MarshalingWindowFrame
Jan 5, 2010I just installed VS 2010 Ultimate Beta2. installation was successful. When I perform the scenario of (File --> Open -- > New), I get that error message.
Error message "Cannot access a disposed object. Object name: 'MarshalingWindowFrame'."
VS 2008 Cannot Access A Disposed Object?
Mar 4, 2010I'm getting this error over and over again when I click the cross button on the main form which is a MDI parent form. How can I fix this error?
error:Cannot access a disposed object.Object name: 'frmmain'.
.net - System.ObjectDisposedException: Cannot Access A Disposed Object
Feb 16, 2012I got the error having the stack trace...
System.ObjectDisposedException: Cannot access a disposed object.
Object name: 'Button'.
at System.Windows.Forms.Control.CreateHandle()
at System.Windows.Forms.Control.get_Handle()
[code]....
It doesn't give error when I just switch the order of the .show and .close method
Friend Sub GoHome(ByVal sender As Form)
InTransit = True
fMain.Show()
sender.Close()
End Sub
why for the first case it gives error and why in second case it doesn't?
Forms - Error: Cannot Access Disposed Object
Mar 20, 2010I got the "infamous" 'Cannot Access Disposed Object.' error when I was attempting to open a form again after I had closed it. The fix (even though it's annoying), is easy enough; but again it's managed code problems and weirdness I still haven't changed my opinion that I won't be using MS .NET after this when I get my development box back to normal. BUT anyway the solution is self explanatory and very easy (and somewhat obvious) [Code]
the Application hiccups with a very nice message, after you close the form down and try to reopen it, that says: Cannot access Disposed object. So, my thought is that the "IsDisposed" property runs some sort of function to determine the Garbage Collection state and does a collection, or updates the request for the collection to be done.
VS 2008 Unhandled Exception - Cannot Access Disposed Object
Nov 19, 2009I get this:
Cannot access a disposed object.
Object name: 'MainForm'.
Here is the code I'm running. It's after the MsgBox "Readme file cannot be found. Please put the original readme in the current working directory of this executable." (and it's dismissed) that I get the unhandled exception error.
Private Sub MainForm_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim readme As String = My.Computer.FileSystem.CurrentDirectory + "
eadme_ctb_v100.txt"
MsgBox(readme)
If My.Computer.FileSystem.FileExists(readme) = True Then
[Code] .....
.net - Cannot Access A Disposed Object When Opening External Exe File From Application
Jun 8, 2012I've a problem with an application i have to use at work. That application is in .net (created by my company). The application call some object that are .exe file. When i try to open it i received the following error:
cannot access a disposed object
I know that it's not really revelant but i've got that problem on my pc and my collegue that use the same application doesn't received that error.I've already check their configuration and i've the same than us. I supposed there are some problems of compatibilty with the framework or thing like that.
Stacktrace
************** Exception Text **************
System.ObjectDisposedException: Cannot access a disposed object named "Form".
Object name: "Form".
[code]....
Form Being Disposed While In Use
Sep 22, 2009Using VB 2005 with .Net 2.0.
I have a form which loads another form, does a little initialization, then hides itself and shows the other form. When the user finishes with the second form, it returns back to the first.[code]..
I thought it might be a timing/speed thing (somehow the server was too fast to load or unload the form), but I put a 5 second sleep between every line of code and that didn't help at all.
Form Being Disposed Of Randomly
Dec 29, 2010Protected Overrides Sub LoadForm()
MyBase.LoadForm()
Try
'StartProcess might be causing an error (error msg is issue with loading config, which would be incorrect)
StartProcess()
[Code] .....
I can run this 100 times under the exact same conditions and it seems like 40 times it will crash with the following error:
"Cannot access a disposed object. Object name: 'frmImportExport'."
It will either die on
'within StartProcess()
Dim __Delegate As New _Delegate(AddressOf StartProcess)
Me.Invoke(__Delegate)
or
Dim D As New _Delegate(AddressOf SOPERATION)
The form isn't being disposed manually anywhere that I see, and this code is being executed on formload. It's a subform that is to be displayed within a main form.
How To Re-open A Form That Has Been Disposed
Oct 5, 2011How do I re-open a form that has been disposed?I tried using GC.Collect() which did not work.I have 2 forms.The first form being the main form and the second being the secondary form. I open the secondary form with form one.Form 2 two opens and after I am done with it I close it.Now I want to open up the second form again and BAME! Error.Cannot access a disposed object.
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View 1 RepliesVS 2010 Code Bug (Disposed Object?)
Oct 4, 2010I am using the following codes:This code triggers my transport sequence. I am not having any variable sequences.
[code]...
What is going wrong? I reach the error at the first instance of "transport.Show()"
Exception Found - Cannot Access A Disposed Object. Object Name:'System.Net.Sockets.NetworkStream'
Dec 31, 2009Occasionally I encountered this exception message while trying to download file from a server using System.Net.FtpWebRequest and System.Net.FtpWebResponse Object.
Download a file.ftpRequest_DL.Method = WebRequestMethods.Ftp.DownloadFile get the response object
Dim ftpResponse_DL As FtpWebResponse = CType(ftpRequest_DL.GetResponse, FtpWebResponse)
[Code]...
Looping Through A Text File Using StreamReader Causes A "Cannot Access A Disposed Object."
Feb 15, 2012I have the following basic code to read a text file from a StreamReader:
Using sr As New StreamReader(FileData)
Dim line As String = String.Empty
Do
'Error occurs on the next line after looping
'past the *last* line in the file...sometimes
line = sr.ReadLine()
'Some code here to parse and process the line
Loop Until (line Is Nothing) OrElse (line = String.Empty)
End Using
I tried changing the Do Loop to Do While Not sr.EndOfStream I tried checking If sr.ReadLine IsNot Nothing and a few other things but I keep getting the Cannot access a disposed object. Object name: 'SslStream' error after all 105 lines have successfully been read and processed. This code has been working for a couple of years, but there seems to be some issue with certain files (recently) that is causing this problem.
I opened the file and I didn't see anything out of the ordinary. No extra blank lines, funny characters or anything of the like. Just a normal file with 105 properly formatted lines. So even know there is something about this file causing the error, I need to obviosly handle this programatically.
What can I do to prevent the sr.ReadLine() line of code from throwing that exception that I have not yet tried?UPDATE Upon reading the last line of the file, the 'EndOfStream' property on the StreamReader goes immdeatly to: EndOfStream: {"Cannot access a disposed object.Object name: 'SslStream'."} It never toggles to 'True'. This makes checking for this condition problematic.
I think I have figured out why this issue only occurs sometimes: if I add in a blank line to the file at the end, none of this ever occurs. It is only when the last line of the file contains data. Still, I should be able to handle this programatically. Telling the vendor supplying the file to always add a blank line at the end should not be the solution.
Cannot Access A Disposed Object Named "MainForm"
Mar 28, 2011I want to dynamically call form, but after the form is closed and reopen i got the error "Cannot access a disposed object named "MainForm"". I've been searching about this error and found out that basically i'm trying to access invalid control.
My question is how i can use the object again? I mean closing and opening form is very common thing to do, so it should be able to be accessible trough the run time. To give you better perspective [code]...
Cannot Access A Disposed Object. Object Name: 'NumericUpDown'?
May 29, 2010i created a DatagridViewNumericUpDownColumn but i got error message Cannot access a disposed object. Object name: 'NumericUpDown' when i closed and reopen the form. what can i do to solve this problems? i checked from the web & i found the answer, but i I couldn't get authorized to view this thread. When i clicked on the link[URL]..It shown You are not authorized to perform this action.
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View 5 RepliesVS 2010 Updating Access DB From VB 2010 Form
Apr 8, 2010I've been working on an app for quite awhile and now am at the point where I have to incorporate an Access DB. Tried many things/variations of what I've found...but now am stuck. So here goes:
I have a Form with this
Public Class Form1
Dim objConnection As New OleDbConnection _
("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|Test.mdb")
[Code].....
Login Form From An Access Database In Vb 2010?
Feb 25, 2010i am working on a project that involves checking that a persons login and password are that of held in the database each person has a seperate username and password i seem to have stumbled across an error. here is the code and i will underline the problems
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Apr 18, 2012I use this code to insert datab from my VB.Net form into my MS Access 2003:
[Code]...
VS 2010 : Coding A Save Button And Combo From A Form To Work With A Access DB?
Feb 23, 2011I am a bit stuck with coding my save button and combobox.My entire form is ready, database is linked.All fields from DB are linked to their textboxes on the form.But i just ran into a big wall which i cant seem to break down.My save button, which is used to save the content from all the textboxes on the form to the access database refuses to work.The other this is, i want to use a combobox on my form to view the already saved entries in the access database.I think a combobox works for that, but i am not exactly sure how to pull that one off.
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