C# - Thread Start In Form1() Crashing Program On Windows Server 2008
May 12, 2011
I'm getting a really strange error. I have a program that needs to run a thread on startup, and for some reason when I do myThread.Start() in Form1() it will crash with "program is not working" (But only on Windows Server, not on my local machine!). However, if I put the same code under button1_Start() it works no problem. What gives?
EDIT A little extra information: In my thread I have a line of code that uses invoke
Invoke(new Action(() => richTextBox1.AppendText(string.Format("Updating {0}..
", DateTime.Now))));
And for some reason the crashing goes away after I make the thread sleep for 2 seconds before it starts executing. Am I using the right method to execute code on the app startup?
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Feb 5, 2010
working on an application which performs a set of operations on Active Directory based on an op code.The application was developed long back and has been working fine. I recently made few changes, which is causing the Server to run out of memory whenever the program is being run. I also modified the code to make sure that the variables being declared in each function are set to "Nothing" at the end of function so that the memory can be collected by garbage collector. To make sure, I'm also forcing garbage collection to take place at different parts of the program. But, I still continue to have the issue. The program is very big and hence I could not upload it.
The code retrieves a list of rows from a table with opcodes in it and based on operation code, it performs a set of tasks. The problem is that when it loops through each row in the table, the size of memory required by the program keeps increasing (> 1 GB) to the point where the Server (Windows 2003) is crashing. I have tried different profiling tools, but none of them have been able to detect any memory leaks in the program. I'm guessing that the resources are being held up and hence causing this issue.
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Feb 14, 2010
i want to design a new program that should start with windows and its icon should appear at the toolbar the idea is when i click on the icon a rectangular forum should appear. my question is that: what is the best tool or control should i use? should i use the blank project of windows application or there is special project for that.
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Mar 11, 2011
I'm typing this up only to document it and possibly save others the three days of frustration and hell I had to go through. Because this unhanded exception was damned near untrappable (it happens on Form.Show(), but since my primary form was affected, I couldn't tell at the time), it's one I know I lost a lot of hair nailing down.
I have an office application. Standard fare utility program that grew to do lots of custom tricks for my place of business. Lots of database providers to pull data from various unconnected sources and crystal reports to make fancy reports from it all.
When I make a change or addition to it, it usually is only needed by one employee, so I only deploy the new version to one computer at a time. Recently, I had to reinstall the program to the whole company. Everything was going fine, until somebody who had a Windows XP machine tried to run it. It was giving a "clr20r3" "System.InvalidOperationException" on program boot. None of my Try-Catch blocks were catching it. Any Windows XP machine I installed it on was failing, and any Vista/Win7 machine had no issues at all.
I spent the next three days trying to catch what was causing it, pulling out references, reinstalling .NET. Searching for references to this error online was futile since System.InvalidOperationException is one of those ultra-generic errors that pop up for hundreds of oddball reasons.
Finally, by happenstance, I found the cause via a single, obscure post on TechArena by a poster with only that post to his name who decided to chime in with his two cents on someone else's System.InvalidOperationException problem.
About a month ago, I replaced the program icon with a new one. I made up a nice Icon, and compiled pre-sized versions of it into a proper .ICO file from 16x16 all the way up to 256x256. I replaced the program icon with it, the links to the shortcuts in the setup program, and the icon on the main form.
THAT was the bug. Because my .ICO file had sizes larger than 64x64, Windows XP couldn't handle it as a form icon! It works fine for the program icon and for the shortcuts, but the form icons MUST be 64x64 or smaller or the program will throw System.InvalidOperationException on Form.Show(). I didn't know this was the issue since this change was over a month old and I hadn't needed to upgrade a Windows XP machine in that time. Windows Vista and 7 can handle large icon files just fine!
Solution, I made a second, WinXP compliant icon just for the main form. Problem solved. My big icon is still used for my program and shortcuts, so they look great scaling to max size in Windows Vista/7 and XP no longer crashes with a cryptic error message.
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Apr 8, 2010
I need to be able to start with Form1, move to LoginForm, then back to Form1 taking 2 variables and the "values" they have in the LoginForm back to Form1 and using the variables. I start with the main form (Form1) and have the user enter some information. Once they click OK I have the LoginForm open. After they enter their credentials I will check to make sure they are legal users, then go back to Form1 (here is where I need to take the Username and Password with me) to log onto a server using the same credentails from the login form.
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Jun 12, 2010
I have a vb.net application and want it to start at Windows start up only if the user checks checkbox1 the procedures on how to do this and the code
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Jul 24, 2011
I have custom asynchronous WebRequest class that I am testing to find out how fast the request will be cancelled and found some odd results, that starting 6 WebRequests with TPL and cancelling them right away takes 25 sec, but when I used just regular background threads it took only 5 sec.
Update: Running them without cancelling takes with Task.Start 9 sec and Thread.Start 3 sec accordingly.
Imports System.Net
Imports System.Threading
[Code]....
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Sep 17, 2009
Is it possible to start a timer on a separate thread so it doesn't block the user interface, or do I have to make a thread that I call from the timer?
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Jun 11, 2009
i want to have some web browsers which navigate wile the thread is running and my problem is that I want to use a web browser object from .net in a thread. when i put a webbrowser object in my form, called webbrowser1, i cant reach it in the thread's operation(start thread). when i type webbroeser1 in the thread it doesn't undrestand what webbrowser1 is.
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Feb 28, 2011
I have made my application to start automaticly when windows start (registry ../currentversion/run/appname + path). In this mode the application start minimized and an little icon appear in the notification icon area. With this icon you can maximize the app or exit it.If you exit the app and start it again using the Menu (Start/programs etc) than the application start in minimized mode (and in this case I would like to have it in normal mode) because the setting autostart is still true.Is there a way you can detect when the application start when windows startup using the above registry or when people click on an icon in the programs menu (or desktop)?
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Mar 17, 2011
I'm trying to get threading to work in ASP.NET but for some reason it keeps crashing my local server, and simply does not work at all when uploaded online. Here's the code:
[Code]...
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Aug 24, 2011
vb 2008, How do I get my VB 2008 application to start automatically when a user logs into Windows?
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Jul 12, 2009
how can i make my program start with windows?
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Apr 9, 2012
when my program opens at windows xp befor the startup logo, so in sted of seen in the windows screen when you turn on your computer the my program opens and dose not show the windows logo.
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Feb 12, 2012
is there a way I can get my program to run when the user logs on to Windows, but before the Start menu and everything shows up, and then when the program terminates, run Windows normally?
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Sep 11, 2009
It works on my own computer where I have visual studio installed. I install the exe file with installutil and the service works fine. But when I install it on another computer where only the framework is present, I still can install it with installutil BUT I can't start it. I get something along this Could not start the Search service on Local computer. Error 1053: The service did not respond to the start or control request in a timely fashion.[code]...
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Jul 23, 2010
i have to develop windows service which will copy files to different servers.So i have to do this task using multi-theading.But i have to start only 3-4 threads.So whenever one threads get finished then i have to start new thread so that count of thread should remain 3 or 4
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Feb 7, 2010
I am working on moving applications from Windows 2000 to new server Windows 2003 R2(64 Bit). I noticed that there are some VB programs and config files for those programs have been placed in Windows 2000 Registry. Some other applications are using them from different servers.Why do we use registry here? How can i move these to registry in windows 2003? Can I just move these or do I have to write VB programs to place them in 2003 registry?
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Mar 12, 2010
I have a .net Windows Service developed in VB.net. I have a settings file in the root directory called Connections.XML and I am setting the basedirectory [code]...
When I schedule the service this is working absolutely fine in my Windows XP machine. But when I installed the same service in our development server (Windows 2003 64 bit Server) for some reason it is not able to locate this file.
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May 13, 2012
I have ran into a small problem with my code. I got bored lately so I wanted to try a project. A program that will start up with windows starts up and it opens a webpage like google.
My code is below.
Imports System.IO
Public Class Form1
[CODE]...
I use the code [code] System.Diagnostics.Process.Start [URL] when a button is clicked, but when I add that code in without clicking a button, it does not work. I have tried to put it everywhere, but it just does not work. I have also looked it up.
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Sep 26, 2011
I have an exceptionhandler function that basically just writes a line to a textbox on Form1. This works fine when being run normally but the second I use a thread to start a process it cannot access the property. No exception is thrown but no text is written to the textbox:
Public Sub ExceptionHandler(ByVal Description As String, Optional ByVal Message As String = Nothing)
' Add Error To Textbox
If Message = Nothing Then
Form1.txtErrLog.Text += Description & vbCrLf
Log_Error(Description)
[Code] .....
Is it possible to access a form's properties from a thread this way or would it be easier to write to a text file or similar and refresh the textbox properties every 10 seconds or so (Don't see this as a good option but if it's the only way it will have to do!).
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Aug 15, 2011
I have developed a windows based clock program using C#,which has all clock functions like: Show time in Digital/Analog Format. Set up Alarm. I want its service to start with windows boot up, so that I don't have to manually start it every time I logon to Windows. I would like to know how do i put that service in start up? For Example: I want the service "ClockService.exe" to run with windows start up, kindly let me know how do I do it.
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Sep 30, 2009
I'm trying to get a VB2008 multi thread application working that connects to a local server program using sockets. Server requests for this particular system can be more quickly handled by a number of connections, so I've written some code to run any number of data request threads that I choose. The problem that I'm having is that the data returned from the server is getting mixed up and is often returned to a different thread/socket than the one that requested it. Other than that, it seems to work okay. If I use just one thread, then the system works as it should. Pls. see incuded code, which is heavily edited to remove all the other fruit salad. Is there any way to set up the sockets so that data returned to the socket/thread that requested it?
Module StaticDeclarations
Public WithEvents g_SD As New SocketDataClass(New MainThread.MTCallback(AddressOf MainThread.MTResultCallbackSub))
Public WithEvents g_MT As New MainThread(New SocketDataClass.SDCallback(AddressOf SocketDataClass.SDThreadResultCallbackSub))
[code]....
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Jan 28, 2009
im creating a project on vb and every time i get quite far into it, it seems to stop taking in commands. For example i have form 1 with loads of buttons and wen i add another one and start debugging the new button (or whatever) wont be their, this has now happend three times and im getting very annoyed.
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May 11, 2012
for our culminating activity we must make a program that uses a bunch of things etc.
i decided to go the extra mile and make sudoku.
The problem lies in generating the puzzle, the program always crashes, but there is never an error. im sure there are easy ways to make the generator, but from what we've learned this is the only way i know how to do it.
Private Sub FirstBlock()
Randomize()
intNumber(0, 0) = Int(9 * Rnd() + 1)
[Code]....
i made a function for each 3x3 square, and what happens is the block its currently on, checks for interferences horizontally, vertically, and within each 3x3 square, because computers process in order, i set it so that it only checks for previous block interferences, since this is the first 3x3 quadrant, there are no previous horizontal/verticals to check.
The code works fine, the problem is when i run it, it says its running but no form appears, i learned to use a progressbar to try and separate each 3x3 block to generate individually, to try and split the processes up 1 second at a time. the problem is, it does run, but it only generates a certain amount before it crashes, and every time its different, sometimes it generates half the puzzle, sometimes 1/3rd, sometimes only the first quadrant.
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Feb 20, 2011
In a program I have written I have FileSystemWatcher pointed two directories. When there is a change it keys up and using a listbox rewrites the files in the folder to the listbox. This all works just dandy.. however..
I wanted to change the listbox out for a TreeView. When I first initialize the TreeView on program start, no problems, but when the FileSystemWatcher kicks in the program crashes. I have tried running the debug but it crashes without any error, just the windows error that the program has stopped working.
I am running Dual XEON Quads with 8Gb RAM and Win7 Pro up to date on all patches so there shouldn't be a problem there.
Here is the code for the listbox:
'Setup Filewatcher for Scan Folder List
Public scanfolder1 As FileSystemWatcher
Public scanfolder2 As FileSystemWatcher
[Code].....
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Jan 12, 2012
This is an annoying issue that started less than a week ago and couldn't come at a worse time, as I have a major project deadline to meet. At least once every TEN minutes, the program crashes with the error "Microsoft Visual Studio has stopped working" -- it only occurs when I am writing/editing code while execution is paused (Edit and Continue), which I do all the time since I am stepping through rather complex subroutines line-by-line. I literally have trained myself to save after each line of code I write, delete, or change, so thankfully I never lose much, if anything, when I restart, but it is irritating and time-consuming having to set up everything in the program and get to the place in the code that I was before. I have installed VS 2010 SP1, tried deleting the .suo file, and a few other supposed fixes that I came across online, to no avail.[code]...
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Jun 9, 2011
I have a program which has 2 forms. I execute form1 first because it reads files and then writes to a file. Then I execute second form (form2) that will read the file created by form1.
How could I make form1 start form2 once it finishes reading file and writing to a file?
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Nov 28, 2009
I recently installed vb express 2008 and with that download i also installed Sql server 2008. Earlier i have been working in MS Access so i have no experience in SQL server. My first problem is how to start sql server. I can see only following:
Start>All Programmes>MS SQL server 2008>Configuration Tools, Import and Export Data(32 bit)>SQL server configuration Manager,SQL server Error and Usage Reporting,SQL server Installation Centre. Moreover in Programme Files i have two folders:
1. MS SQL SERVER and
2. MS SQL SERVER COMPACT EDITION
how to start to create a database in SQL server with Vb express 2008.
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May 24, 2010
my program is crashing when i use this code to find the textlength of a text box.this is my code
TextBox13.AppendText("dcmd(" + TextBox14.Text + ", " + TextBox14.TextLength + ", cmdtext);" + vbNewLine)it crashes on textbox.14.textlength
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