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
[Code]...
When I end my app by pressing the stop button in visual studio, is there a way for that event to trigger some exit code? I'd rather do that than include a visually distracting quit button.
Better still would be to program some kind of key sequence, eg control + q to trigger some quit code so my app can exit cleanly. Is this possible? I wouldn't know how to program a key shortcut but it might be handy.
I have a START and STOP button and when the user clicks "start" the program does a whole bunch of calculations and all. However, I noticed that when I was testing the program I clicked STOP the program continues to execute stuff.
My START code is basically a while loop that iteratively does some calculations.
So I just put a boolean variable as the while condition and when user clicks stop its set to false and when user clicks start its set to true. However, when I click stop, the condition is set to false yes but it still executes all the code until the condition is re-evaluated right...so my question is how can I get out of the while loop when user instantly clicks "stop"?
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
[Code]...
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:
[Code]...
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 Repliesdoes any one know the reason of why I get Warning in the Finally block in vb.
[Code]...
I 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
[code]....
I wrote the following code to build a basic game that makes two cars race (randomgenerator) and let the user pick their bets on the end results. I've gone terribly wrong somewhere in that my cars only race halfway then get stuck behind the start line and the programme keeps repeating the beeping and the messsagebox.show and adding results to the 'incorrect' box.
The only way to terminate the application is to hit 'stop debugging'.
Option Explicit On
Option Strict On
Public Class MainForm
[Code].....
This is a rather odd problem i am running into I currently have a web page that i am adding hyperlinks to that when clicked will open a file (usually Word file though there are some Excel files). Here's the problem. When debugging all of the files do open properly, however, files labeled .doc, .docx, or .xls all end up stopping debug mode when they open. I have .docm files that open properly and do not stop debugging. There isn't an error thrown anywhere just a forced stop of debug mode it seems.
Has anyone ran into a problem similar to this? I have only tested locally but i am unsure if it will cause problems when putting it on the test server. I'm still not quite done with the rest of the page so i was hoping to stop this behavior before completeing the project.
When I go to Debug my program (F5), the program will load, until I click on the form with the main part of code in it, and then the program freezes, although it doesn't lock up because as soon as I press stop debugging/ task manager end process, it closes fine.
I will attach the zip of the program here. The form that it freezes on is "Black Ops". Edit Due to the forum not accepting my .Zip file (Invalid file type), I will upload it to MediaFire. Download link (445kb): Click Here
I have a small problem, When i Start Debugging my program a lot of windows popping up such as: Watch 1 - 4, Memory 1 - 4,Autos And Registers. What should I turn off to make them stop popping on debugging?
View 4 RepliesIs there any way visual studio block Port 8080 to stop the internet? I want to make an administration system and I have a functionality that blocks the internet of a computer but everytime i look for a solution in the web it is either from another language or just a discussion about network protocols. Can someone help me? I had a background of tcp/ip protocols but i really can't figure it out and convert it to codes using visual studio.
View 5 RepliesI have a database application with error handling in a separate module.
[Code]...
But while debugging (and "Address" field is left empty), the program breaks and I get an exception at the "Throw New Exception" line even if the error should be trapped by the "Try...Catch" block.
At runtime, everything works well and the correct error is displayed.
There has been an Visual Studio addin created by Heslacher based on code by JohnWein which allows one to copy code in Visual Studio and paste it as HTML code block here in the forums.urls...
View 10 RepliesHow to comment multiple lines of code/block of code in VB?
View 5 RepliesI installed VS2008 ona newVista Ultimate 64 Bit machine. Works great. But if I try to change some VB2008 code while debugging, the system says, "Changes to 64 Bit applications are not allowed". Why is this? And will programming on a 64Bit machine always be hampered like this
View 4 RepliesOn my last machine I had created a way to see a GUID variable while debugging by hovering over it. I don't remember what it was (a visualizer?). I have a new 64 bit machine with vs2008 - is there anyway to mouseover a guid value and have it appear? What makes guid's so special that their value doesn't show like most variables?
View 3 RepliesI dont where am going wrong but when i am programming i will make some changes to make code and form e.g add a button or something. Then when i go to debug my program my change dont appear and its been a couple of days and my changes still dont appear when i debug my program.
View 1 RepliesPrior to VS 2010 I was able to debug VB6 client code from the .Net IDE by setting "Start External Program" to vb6.exe (full path), or attaching to the running vb6 executable via "Tools->Attach to Process" and have execution stop at the required breakpoints in my .Net code.
Now with VS 2010 I seem to be only able to accomplish the same by setting the target framework to 4.
Is this a bug in VS 2010, or is there a switch/option that controls this?
I understand how try-catch works and how try-finally works, but I find myself using those (usually) in two completely different scenarios:
try-finally (or using in C# and VB) is mostly used around some medium-sized code block that uses some resource that needs to be disposed properly.
try-catch is mostly used either
around a single statement that can fail in a very specific way or (as a catch-all) at a very high level of the application, usually directly below some user interface action.
In my experience, cases where a try-catch-finally would be appropriate, i.e., where the block in which I want to catch some particular exception is exactly the same block in which I use some disposable resource, are extremely rare. Yet, the language designers of C#, VB and Java seem to consider this to be a highly common scenario; the VB designers even think about adding catch to using.
Or am I just overly pedantic with my restrictive use of try-catch?
EDIT: To clarify: My code usually looks like this (functions unrolled for clarity):
Try
do something
Aquire Resource (e.g. get DB connection)
Try
[Code]....
which just seems to make much more sense than putting any of the two catches on the same level as finally just to avoid indentation.
I am converting an old asp project to a new .NET project. Now, all vb code are inside aspx files, and we are on the process of moving all vb script from aspx files to .vb files. My problem is, I can't debug the vb script inside most of the aspx files. All my friends don't have this problem. I think the problem is with vb text editor.I am using Visual Studio 2008. Is there anyway, I can make visual studio understand that aspx files have vb script inside them.
View 2 RepliesI have some VB6 code that instantiates a class which handles events that are being raised from a VB.NET component. The VB6 is pretty straightforward:private m_eventHandler as new Collection
public sub InitSomething()
dim handler as EventHandler
set handler = new EventHandler
m_eventHandler.Add handler
m_engine.Start
[Code]...
My problem is that when I debug the VB6 program, the first time InitSomething gets called, the event will not be handled (the VB6 event handler is never entered). Subsequent calls to InitSomething does work.
Everything works as I would have expected when I run the program outside the debugger. At this point, I'm not even sure if this is something I should be worried about.It may or may not be relevant but the VB.NET was converted from a VB6 using the Visual Studio code conversion tool (and subsequently manually cleaned up).
When debugging a program and then we take it to a line breakpoint,then I want to modify the code again.but could not and such message appears in the image which I attach.What can we edit code program at the time of the process of debugging.This can be done in visual basic 6 ide?
View 2 RepliesWhen I am in break mode, I cannot update code.I receive message "Cannot currently modify this text in the editor. It is read only." Can anyone explain why I get this message?
View 1 Repliesi wrote a piece of code to write some data to a card reader, and read back from that device, filling a form with the data (after reformat).When I step through the code while debugging (using F5, F8 for stepping forward) the form is filled correctly.However, when I run the code (Ctrl-F5), the program seems to hang for about 5 sec and then throws an exception: 'Length should be >0' When looking further during debug - it seems that the program calls 2x the Sub Frm_Read_Display(). I
Imports System.Windows.Forms
Imports System
Imports System.IO.Ports
Imports System.Threading
[code]....
I want to get a 48 byte block of assembly code from the memory, save that code in a global array or whatever, then I wanna NOP everything from 0xF to 0x16, and write that into the memory, and then later I wanna use the global block to set it back, how can this be achieved in VB.NET?
View 4 Repliesnow if i've written a code, and then wrote that if a certain condition presents then repeat that code again including that if condition, so what is the code for this?
View 3 Replies