A short while ago, I posted the following code snippet in reply to someone who was looking to make a simple encoded password... See here for a full explanation of how this works --> [URL].
[Code]....
The following is a screenshot of the problem: What can I do?
View 3 RepliesIn VB 2005, I am calling a C++ DLL function that returns the address in memory and size in bytes of a jpeg image. How can I load that jpeg image directly from memory into a picture box in my VB form? I cannot afford to save it to disk first.
View 10 RepliesIm getting a problem with one of my programs I have made in visual basic.NET where it gives me a memory error when i debug the program in the IDE. the exact error is this: "Attempted to read or write protected memory. This is often an indication that other memory is corrupt". My program basically has a few forms with text fields on that get their text values from an access database on the same hard drive. Im wondering if im doing something wrong because my program just seems to eat up memory whenever it does anything. For example I have one form that has a combobox on it and when you change the drop down list selection it retreives a few strings from the database and puts them into the relevant text boxes, if you keep changing the selection then the memory usage (in task manager) just keeps going up and up. occasionally I get the error mentioned above when debugging but in my built version of the program it throws an exception everytime the memory usage gets past 49K.
Also I noticed when debugging in the "immediate window" frame I get the following message often:A first chance exception of type 'System. Invalid OperationException' occurred in System.Data.dll...Do I need to somehow be "releasing" the memory that is used to gather data once it becomes redundant?
I am using the following code
This error occurs :
Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
Public Class FormRegEnumValue
[CODE]......................
QuoteSystem.AccessViolationException was unhandled Message="Attempted to read or write protected memory. This is often an indication that other memory is corrupt." Source="System.Windows.Forms"
Im designing a web browser and i continue to receive this error after going to about 3 websites it crashes with that error.
I have a BackgroundWorker object that I instantiated to perform a DB process on a background thread ansynchronously. I have event handlers for DoWork and RunWorkerCompleted. I can tell that the BackgroundWorker is disposing of itself because I added a message box into the Disposed event handler.Is it necessary to detach the event handlers to ensure that the memory is cleaned up and that there are not memory leaks?
View 1 RepliesI've noticed that every time I start a new thread in my program, the memory usage jumps about 1000k and it never goes back down. I have ensured that the thread is no longer running, and only one instance of my worker thread is ever running at a time. I am using ThreadPool.QueueUserWorkItem and ASyncOperation to get stuff done. The program starts using a Sub Main in a module that uses STAThread; I read that using STAThread instead of MTAThread makes it impossible for the Garbage Collector to get in and consider objects for garbage collection. However, when I change the STAThread to an MTAThread, the WebBrowser control in my frmMain cannot be instantiated.
I get this exception:
Code: An unhandled exception of type 'System.Threading.ThreadStateException' occurred in System.Windows.Forms.dll
Additional information: ActiveX control '8856f961-340a-11d0-a96b-00c04fd705a2' cannot be instantiated because the current thread is not in a single-threaded apartment. I do threading with the WebBrowser control, so will using MTAThread fix my problem? If so, how should I partition my code so that the WebBrowser control won't be affected by the above exception? I call the thread repeatedly with a timer (although only one instance ever runs at a time), and my program's memory usage starts at about 5000k and can jump to 300,000k+ depending on many times the thread needs to be called.
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.
The follow code can be called about 6K times on the server it is run on then gets a out of memory error in the last catch statement. I don't see what is wrong with the code, it works well up until the out of memory..
Public Function AddUserToGroup(ByVal sSamAccountName As String, ByVal sGroupName As String) As Boolean
Try
Dim returnStatus As Boolean = True[code]......
I have two forms, Form1 and Form2. Form2 has a button to show OpenFileDialog. I call Form2 from Form1 by a button. My startUp Form is Form1. When i start debugging, i press my Form1's button to show my Form2, it shows, but when i click On Form2's Button to show OpenFileDialog it is giving me exception that
"Attempted to read or write protected memory. This is often an indication that other memory is corrupt."
When i set my startup Form to Form2 and click Form2's Button to show OpenFileDialog then it shows!
I have a new problem with this same Form Printing project and I get exactly the same exception but from the different point of code:
line 538: d.PrintFunction(c, typePrint, mp, x, y, extendedHeight, ScanForChildControls)
The exception type is System.AccessViolationException and it says (after I translate it from my own language in which the message is given in my pc, into English):"Protected memory was tried to be read or written. This often indicates that the other memory is damaged"
I am getting the following error: "Attempted to read or write protected memory. This is often an indication that other memory is corrupt". i am using interop service.
View 2 RepliesThis code was put together for a one time run. It's purpose is to count all the pages in a group of images. After about 6000 of 1,250,000 images in ##X it throws an "out of memory" error. Besides it being thrown together for a one time run does anybody see anything obvious that could be causing the error?
CODE:
I am using VB.NET 2010 and accessing a DLL that was created in VB6.I added the DLL in the References, and in the program I do the following:
Dim
RTF As
myDLL.clsRTF
[code]....
[code]...
I got some of the code from my other thread. I had over 100 textboxes, and I wanted a loop that got all of the text from the boxes, and copies it to clipboard.What is wrong with the syntax?
I am brand new to the programming scene and I beyond lost. My first excerises I got no problem, but I am having problems with calculations and names not being declared.I tried following the book, but I cannot seem to get rid of these few! [code]
View 1 Repliesok idk where i went wronge here this is the code and the error to this code is
"strPath" is not declared. it may be inaccesible due to its protection level.
Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click For Each Item As String In IO.Directory.GetFiles(strPath, "*.*", IO.SearchOption.AllDirectories)
[Code]...
When i use the code below i get the following error:Quote:
Name 'Cert_NoTextBox' is not declared
If Me.ActiveMdiChild.Text = "Form_Minor_Cert" Then
Form_Report_Minor.CertNo = Cert_NoTextBox.text
[code].....
I am trying to write a console app in VB Studio 2005 that writes the source code of a URL to a text file. I have added a reference to Microsoft Internet Transfer controls to my project but when my code first references Inet1 there is a compiler error. What am I missing?
View 10 RepliesI get the following error when trying to secure a password string.
'name ConvertToSecureString is not declared'
here is my code:
Dim
pswrd As SecureString = ConvertToSecureString(Me.TB_Password.Text)
Dim strcmd As String = "net use" & " " & Me.CB_Drive.Text & ":" & " " & "\" &
[Code]....
I am writing some code that basically updates a checkout. however I am running into some build errors.
Public Class Cart
Public shoppingcart As New List(Of Item)
Public totalofrunningitems As Integer
[code]....
Private Sub btnAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAdd.Click
If txtBookID.Text.Length = 0 Or txtAuthor.Text.Length = 0 Or _
[code]......
Quick background: I have a VB.NET application in which I was previously using ConfigurationSettings.AppSettings to read from app.config, and got an error message to change it to System.Configuration.ConfigurationManager.AppSettings (as the first way is now obsolete)I did so, and I even have a reference to System.Configuration.dll AND the Imports statement at the top, but I am getting a "Name ConfigurationManager not declared" error message. Any suggestions?
CODE:
It's pretty straightforward - I'm just checking if something exists, and if it does, I read from it:
If Not Exists(ConfigurationManager.AppSettings.Get(rep & "Email")) Then
Return False
End If
message = ReadAllText(ConfigurationManager.AppSettings.Get(rep & "Email"))
I have written some encryption software and I am getting an error from this piece of code The error is - Name 'it' is not declared
Imports System.IO
Imports System.Text
Imports System.Security.Cryptography
Public Class Form1
[code]....
The program is simple enough, I load a file I want to encrypt, type in a password to the password box and click the encrypt button.
Protected Sub btnadd_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnadd.Click
Dim c As New StoredProcedure
Dim result As String
[code]....
when I was using vs2008, code below was working without defining mystudent variable.It was recognizing type automaticly because of mystudents list of object.Has anyone know the reason why compiler returns error that "It is not declared"?
View 16 RepliesI'm using VB.NET 2010.
One of my lines of code is:
Encoding.UTF8.GetBytes(FormsAuthentication.HashPasswordForStoringInConfigFile(TextBox_AccessCode.Text, "MD5"))
But FormsAuthentication is underlined and the error reads 'FormsAuthentication' is not declared. I've ensured that the System.Web.Security namespace is imported, yet I still receive the message.
i am using the below code but getting error.
View 5 Replieshow do I keep a Socket declared forever so i can call it in other methods?
All the tutorials i've read just have a server, client, server sends client message, client disconnects. What if I want to remain connected? I've tried making the sockets global but that didn't work somehow.
