I�ve had a problem iwht my app for some time now. It�s very slow and above all it takes forever to startup. I�ve been adressing som issues that has to do with the database behind it.Recently I noticed that the app is starting an instance of excel, which seems to be what�s taking it so long in the starting process. The app is using access as db, and the db has some linked excelsheets. The app is also running some code in excel, but it�s starting, and terrminating, separate instances for that.The linked excelsheets are also "live-linked" to another app (third party), fetching real time data via DDE I think.
I keep getting the following error in XP only (not Vista or Windows 7) Attempted to read or write protected memory. This is often an indication that other memory is corrupt The interesting thing is that the error is on a line that basically just creates a bitmap:
vb Dim B as New Bitmap(400, 300)
This is in a timer and doesn't always happen the same time - eg sometimes it happens in 2 seconds sometimes it gets to 10 seconds - the interval is 50ms?
I have coded in the older version of VB for years (VB6 and prior) and Recently I just began learning VB 2008. In my current project I made a mistake in a form name frmAuthors and so far I am unable to recover. The problem is that I tried to have the form inherit a class I had created (first mistake). The IDE generated a popup message stating the error and provided the option of changing from inheritance from system.windows.forms to the class I had created. I said yes just to see what would happen (I was bored so I was up for something new) and that's when the form got corrupted.Is there a way to let frmAuthors go back to recognizing itself as a form object and not a member of the object I had created?
I have a single user app that I wrote and have been using for more than a year that uses an Access 2003 database. Today, out of the blue, I started getting a DB concurrency violation whenever I tried to update one particular table in the database. After trying to troubleshoot what the problem might be, I just deleted that table and recreated it and the problem went away.
This is simple to explain, i need to track the process id from the files I execute. So lets look at the code.For this example just create 2 files in the C: and call it 1.xlsx and 2.xlsxNow open the firts file ...
Dim objFileExecute As New System.Diagnostics.Process objFileExecute = Process.Start("C:1.xlsx") MsgBox(objFileExecute.Id)
I cannot use Visual Basic 2008 at all. When I go to "new project" and choose "Windows Form Application" I get this error.I have tried multiple uninstall/reinstall with no result.A microsoft reply to this suggested that I needed: " .NET Framework 2.0 Service Pack 1 " I checked, and I did not have the .netframework 2.0 service Pack 1. When I tried to download and install the above from Microsoft.com, the istaller said that "it was not allowsed" and I was not able to install the service pack 1.
I tried Uninstalling net framework 3.5, 3.0, 2.0 and then reinstalling .netframework 2.0 sevice pack 1; then reinstalling Visual basic 2008 express edition. At the reinstall of Visual basic 2008, .netframework 2.0 sevice pack 1 is unistalled by .net framework service pack 2.When I check the foruims for simiar problems, the formus are mostly for Visual basic 5.0, or other programs that I do not have.
Here is the programs I have installed:
Operating system: Windows XP Microsoft .net framework 1.1 Microsoft .NET framwork 1.1 Hotfix(KB928366) Microsoft .Net Framework 2.0 Service Pack 2
[code]....
All the security updates and hotfixes for Widows XP.
I am just starting to program with Visual Basic 2008. I would consider myself at a Beginner - Intermedite level of programming with VB and looking to get better. I noticed that in other language forums on this site that there were program suggestions but didnt see one here so I thought i'd ask.
I have an executable (EXE) that I would like to run from within my VB.NET program. I've looked into Process.Start("[PATH][EXE]"), where PATH is the path to my executable, and EXE is the name of the executable. However this throws an error, saying "The parameter is incorrect". I've managed to avoid this error with the following
the below code starts the correct process but the windows form never displays on the remote machine. How do I get the application to actually load.
Private Sub RunRemoteProcess() Dim sCmd As String = "C:Program FilesInternet ExplorerIEXPLORE.EXE " & txtData.Text.Trim ' add a reference to System.Management in Solution Explorer
I like to have assistance with the VB 6 codes below; a few cheeky lines dock into positions I do not mean them to be in; sorry; I am on VB 2008 Express; a few lines have errors; adjacent to them I have described what VB 2008 reports.
I am trying to set a form position before it shows but i cant get it working.Form Name: ColorCentraling.vb
I've tried: Private Sub ClickNPC_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ClickNPC.Tick
[Code]...
are 2 integers which represent a number which does not need to be explained.There i've made a DIM as the form but new! I've tried settings its location but its not possible for me.I know this is possible because: I've visited many VB.NET 2008 Programs that do this
Ok so my main form takes around 5 seconds to load i can't make it so that my load subs are on a seperate thread because too many cross thread calls being made besides i want a splash screen anyway i want a splash screen on a seperate thread that can update status while main thread is loading this way main thread carries the load subs and invokes status label changes in the splash form which is on another thread
this is my code
Dim SPForm As SplashForm Public Sub LoaderSub(ByVal Splashed As Boolean) If Splashed = False Then
[Code]...
what happens is the splash form shows and so does the main form but they both lag for 5 seconds (as if they are both on main thread) how do i make it so that the splash form loads from the new thread? I thought the way i did it that's what should happen...
EDIT: also why did code wraps failed to show proper vb code?
The arguement -new is not being passed and the window that shows the website will open if no other windows are open. However, if any other windows are open, the last opened window gets the website.I have IE6 on my system. Is there any special syntax that will open a new browser window without using one that is currently open?
I have created a setup project that after the installation, starts the app that is being installed. To do that I have added an Installer class to the app I want to get started and I am using it's commited event to start the app (Process.Start("...myapp.exe").
While this works fine on XP, on Windows Vista the application gets started as a "System" user which makes some parts of the app missbehave i.e. retreiving special folders of the user etc...
This is the question: way to start myapp as the logged in user? Mind you I will not have the credentials of the users.
I have a "Please Wait..." form that I show when doing some long task. This works quite well. But I cannot seem to control the opening position of the form. Currently I am using:
and this is just being ignored. The window opens at random locations. If I change it to CenterScreen, that works! But I don't want it center screen, I want it centered on the parent. Can I manually set the location? I am using VB 2008 Express and the wait form is a plain windows form.
I just had to rebuild a PC and saved my old project files -- hopefully I'm going to be ok with a new installation. I just opened my new install of VB2008 and clicked on a project.
First of all, Hi to everyone, I'm new here..I'm currently investigating a way of doing the following and seem to be coming up with dead-ends!I am trying to create a windows service that sits in the background waiting for programs to be started. When the programs start I want to be able to check a unique bit of information for each program (I believe GUIDs may provide this) to see what the program is. If the program is not allowed, I aim to provide a warning to the user and possibly close the program. The aim of the application is to identify when users are attempting to install additional software on to the computer so simply monitoring for a certain executable wouldn't work as msiexec is called for all MSI's and as I only want to stop blacklisted programs...this wouldnt work.
I have had a user of my VB.net web app complain he keeps getting an intermittent error message, causing him to crash out of the system.
Stack Trace: [FormatException: Invalid character in a Base-64 string.] System.Convert.FromBase64String(Strings) +0 System.web. UI. LosFormatter.Deserialize(String input) +25
[code]...
It appears from the error message that the viewstate keeps becoming corrupt (see screen-dump below), but I don't understand why. He claims it happens every 2-3 minutes, but I've used the system a lot and have never experienced it.I should mention too that he is using the web-app in a very "non-standard" way. To achieve optimum speed he's actually using remote desktop, to connect to our server directly, and running it as localhost. ("Madness!"- yes, I know. I didn't make the decision.) That may not be relevant of course.
I am working on hex values of a file.Now to test it i delete single byte and then try to write the file using the remaining bytes.Well the file gets corrupted but still the file is constructed.
I'm just starting out with VB and have downloaded and installed VB Express 2008. I'm researching and trying to wrap my head around programming in VB before I start working on any projects. I have a little bit of experience with ASP Classic so some of the syntax looks familiar, but I can't get a handle on database integration. Let's say I am creating an address book. Each installation is a stand-alone (no network connectivity). How are databases used in this situation? Are they built using VB Express and packaged into the installer or can you create them separately (using either Access or MySQL) and then package them into the installer? What is needed to read and write to these databases? Are there extra bits of software that need to be packaged into the installer to allow access to the databases?
What if this application does connect to a centralized database (let's say a MySQL or Access database on a web server). Is the connectivity handled the same way? Sorry for so many questions, but I just can find the answers I'm looking for when searching. I'm not necessarily looking for the actual code to do this, just an explanation of how it's possible (or even a link to some examples/tutorials).
I've created a Windows Service and installed it via InstallUtil so I can test it out.The installation goes seamlessly, but it will not start from some reason. When I attempt to start it, I get an "Access Denied" error and that's it.
I haven't been able to find any information via the normal channels.I first thought to give the service admin rights, but that didn't work either.
how to PROPERLY make a multi-tabbed or multi-window application that can handle file start requests.
For example, on startup my "Desktop Application" runs and sits there waiting for a task, either through the main menu, or for a file to display in a window. Now the problem is simple, how can I make this already running program load the dropped file (dropped on the executable (!)), instead of starting a new instance.
I understand I will have to check if the process is running, and if so, do some stuff with it. But the problem is passing the message to the active program.
Previously I used text files with paths/arguments in them, but I don't like the idea of the OS/program checking every 500 ms if a file is created in the "load this" folder...
Then I thought of sending a message using "Send Message", for example changing the text in a textbox and handle the "Text Changed" event, but is this reliable? Can any other program interfere with it?
So, basically I need the proper way of doing all of this. For example, Microsoft Visual Studio does this nicely, and no lag whatsoever...
I'm transferring from one FTP (a Dev site) to another FTP (a Test site). Spare me the thoughts of changing this process. In any case, here's my method:
Public Function TransferFile(originalFile As String, destinationFile As String) As String Try 'FileStream for holding the file Dim uploadRequest As FtpWebRequest = WebRequest.Create(destinationFile) uploadRequest.Method = WebRequestMethods.Ftp.UploadFile [Code] .....
This works perfectly for ASPX files and their .vb code behinds. When we try to transfer .DLL files, they show up on the server as 0 bytes, and sometimes actually transfer. The problem is that, despite being the same size as the original, they act as if they are corrupt.
I have a background worker which runs, at the start it stops a timer which has it's interval set to 500ms, at the end of the bgworker sub it starts it again. I've debugged and found out that the line that starts the timer up again (tTimer.Enabled=True) runs. However the timer does not resume. I'm don't know, but I'm thinking perhaps because I'm stopping and starting it on another thread it's not resuming properly or the sub it was attached to (via AddHandler) has been reset or something so it's running but not running the code in the sub it was attached to. If I never stop the timer in the code, it continues to run just fine, but I need it to stop at the start.
I have a Parent form that loads a child form and I only want to allow one instance of the child form. I have this on the button to open the form. Stepping through the code with the debugger it "appears" to work OK when the form is open (I say appears because nothing changes) but when the form is closed it doesn't open as I would expect. What am I missing?
