In Finally Block, How can we check if an exception occurred or Not.I am programming in VB.Net. Why i am asking is that in the Finally Block there could be some things you would like to do if an Exception has occured and some things you want to do if an exception has not occured. So, within finally block how do we know if an exception has occured
View 11 RepliesI am Not using the "Catch Ex as Exception" for some of my application's architect details.So, if my code is something like
Try
'code here
Catch ex As ApplicationException '!!! i.e. ApplicationException
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does any one know the reason of why I get Warning in the Finally block in vb.
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I often use the Try block to catch exeptions, and I have read in the help pages to do with the Finally statement. But, from what I understand it has no use whatsoever. Why would I use Finally instead of just ending the Try block. For example, from what I know
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In this VB.NET code:
Dim o as SomeClass
Try
o = new SomeClass
'call some method on o here
Catch(...)
Why is there a need to set o to Nothing? What if i don't set it to Nothing in the Finally block? What i think is that it is OK if you don't set it to Nothing because the object will be marked for GC.
Is there some special way to catch exceptions in finally block ?
View 2 RepliesThis is a followup question to this Should I stick with the Try/Catch/Finally construct, or go with the Using construct? Sample Code for Try/Catch/Finally:
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Well, I've read (and learned) that the finally block doesn't always execute its code (even apart from pulling the plug).FYI For more information, see try catch finally question
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Assume you have the following code:
Instead of doing:
Try
'
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I have a large project where we have 2-3 dll projects that are converted from VB6 to VB.NET. We have fixed all the issues that caused compilation errors, and most of obvious issues in running, so now we have basically a program up and running. The exe is created from scratch in VB.NET, using a lot of functionality from the converted dll's (including GUI forms). What I wonder is when I run the program in debug mode, I get a bunch of warnings in the "Immediate Window" saying:
A first chance exception of type 'System.Exception' occurred in Microsoft.VisualBasic.dll
...and some of other type (but most of them in Microsoft.VisualBasic.dll).I was wondering if this is common in projects converted from VB6, or if it is caused by bad design in our code...
If I throw an exception from within a catch, does the finally (from the catch) still execute? i.e.
Try
..some code with an exception in it...
catch ex as Exception
throw new SpecialException("blah blah" & ex.Message, ex)
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when doing the exact same thing on a diffrent pc it give me "An exception occurred during a webclient request." even in debugging.the first way is the regular "my.computer.download file" and the second one is:[code]
View 5 RepliesI have a problem whit the webclient request. It work great on my pc, but my pc alone. It just says "an exeption occured during a webclient request." I thought it was the user-agent header.. but now when I have that, its the same.
View 4 RepliesAn unhandled exception has occurred in your application??
View 3 RepliesI have installed VB6 and Visual studio 2005. when i am opening the VB6 files getting this error.
Visual Studio Just in time debugger
An unhandled win32 exception occurred in VB6.EXE
unhandled exception has occurred in your application
View 7 RepliesI have a small application. When I start to debug it, in the debug window I get the error 'An exception System.NullReferencException is occurred in svc.exe' whithout the string 'object referenc not set ... ' But the debugging isn't stopping and the programm runs and I can't figure out where the bug is because the debugging tool doesn't stop in the line of the bug. Why? How can I find the bug?
View 4 RepliesI want redirect to error page when exception occured. If the code is not handling try{}catch(Exception ex){}in the page and if error occured in web application. Then I want redirect Error.aspx with Exception details to diplay. I am already wrote code in Global.asax page like this.
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In my code I am trying to come up with the following messages using a try/catch Unhandled exception has occurred in your application. If you click continue, the application will ignore this error adn attemp to continue. If you click Quit, the application will close immediately.conversion from string """" to type 'integer' is not valid Warning Icon followed by 3 buttons one that saids the DETAILS, another for CONTINUE, and one for QUIT.Here is part of my code. I did use Try/catch correctly, but it doesnt say the message the way i described it above ..
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unhandled exception has occurred in your application .net framework if you click Click continue and application will ignore this error and attempt to continue if you click quit the application will close immediatly
index 62515 out of bounds
In this application, it fills the access database with data
I try to share my project to the other computer and i got this error:
Unhandled exception has occurred in your application, If you click
Continue. the application will ignore this eror and attempt to continue. If you click Quit, the application will close immediately.
The File "\FolderProjectBinDebugProjectDatabase.mdf" is on a network path that is not supported for data files.An attemp to attach an auto-named database for "\FolderProjectBinDebugProjectDatabase.mdf" failed.A database with the same name exists, or specified file cannot be opened, or it is located on UNC how to fix this error?
I have several ActiveX controls in my project one of them loads solidmodeling files for viewing. Because this process can take some time the authors provided an OnFinishedLoadingDocument event.This worked fine under VB6.Now however under VB.NET 2008 framework 3.5 I get an exception thrown When I try to access a form control from this event.
Quote:
A first chance exception of type 'System.InvalidOperationException' occurred in System.Windows.Forms.dll I found an article that says something about it.
Quote:
If you are using ActiveX controls on a form, you may receive the cross-thread InvalidOperationException when you run under the debugger How can I add text to my control from this event?
Code:
Private Sub oView_SW_OnFinishedLoadingDocument(ByVal sender As Object, _
ByVal e As AxEModelView._IEModelViewControlEvents_OnFinishedLoadingDocumentEvent) _
Handles oView_SW.OnFinishedLoadingDocument
Dim nSheet As Integer = 0
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in my machine it works fine, when i run program on another machine it gets error:
An error occurred creating the form. See Exception.InnerException for details. The error is: Could not load type 'Microsoft.VisualBasic.PowerPacks.ShapeContainer' from assembly 'Microsoft.VisualBasic.PowerPacks.Vs, Version=9.0.0.0, Culture=neutral,
At first it was when I was trying to output to a text file, I disabled that for testing purposes and now I'm getting it randomly again.. Here is the code that always seems to throw the exceptio:
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I am trying to install a 64 bit windows service application and I get the following error:Error 1001. Exception occurred while initializing the installation: System. BadImage FormatException: Could not load file or assembly 'file:///C:Program Files or one of its dependencies.An attempt was made to load a program with an incorrect format.
View 2 Replieswhy this error comes up it has happened in most of my projects and i don't know how to fix it.An unhandled exception of type 'System.StackOverflowException' occurred in Unknown Module.
View 6 RepliesI have written an application but it didn't work here on my pc and unhandled expression occurred when I execute my program then this error is occurred.
"System.InvalidOperationException was unhandled
Message="An error occurred creating the form. See Exception.InnerException for details. The error is: Unable to cast object of type 'System.String' to type 'System.Byte[]'."
Source="E-Photographer"
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List View is already added for the purpose of thumbnails. I also need thumbnails when I click on root of the treeview and I also want to show image in the picture box when I click on node(photo). I need my code such as that it can display thumbnails on List View and pictures on Picture Box.
I am facing a problem where i couldnt able to fix it. Could anyone help me on this issue.
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I am running vs 2008 and and trying to connect to an sql server 2005 to do userauthentication, but the error message i get is"Access to the registry key 'HKEY_LOCAL_MACHINESOFTWARESmartinfoLibServer' is denied" and the message "A first chance exception of type 'System.UnauthorizedAccessException' occurred in mscorlib.dll" also shows in the immediate window.
View 1 Replieshere is mt code it was working great till i closed my computer and go to sleep then when i wakeup i found that the form that i was working with not working
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