Out Of Memory Using StreamReader?
Dec 8, 2011
I am testing code that recursively searches for files, reads them and determines if a user supplied text string can be found. I am getting Out of memory errors on files > 250 MB. The system has 4GB RAM and no other apps are running. Here is the section that throws the error. Other than this, the program seems to work perfectly. 250 MB files are OK, 275MB files are not.
Private Function FindStringInFile(ByVal FileName As String, ByVal SearchFor As String) As Integer
Dim strTest As String = String.Empty
[Code].....
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Apr 19, 2011
I have a problem with a streamreader in visual basic 2008.I am updating a database from text files on an ftp server. The streamreader works fine until the file is more than 100,000 bytes long.It reads until it reaches this point and then just ends. No error message, it just reads to this point which happens to be 2 fields out of 6 in the database stream. My question is - does the streamreader have a limit? And if so what is a workaround?
Dim connString As String = "Data Source=" & pDataBase
conn = New SqlCeConnection(connString)
Dim strQuery As String = ""[code]......
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Jul 9, 2009
I'm writing a program that basically loads an entire text file into a streamreader variable, then reads this variable line by line and parses and writes a line into a new text file. I'm VERY new and my knowledge is mostly self-taught, but I can't seem to get out of this one. It works for smaller files, but it appears to reach a limit in characters at some point because in a file of 900 lines, it stops writing about halfway through 800 and there are no errors, the program actually completes and the message box pops up.
There are a few things with this code I already know I should fix, such as creating the new text file name, it's messy, I just don't know how.
Private Sub btnProcess_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnProcess.Click
Dim IndexValues As String()
[CODE]...
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Nov 5, 2009
In 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.
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May 22, 2007
Im 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?
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Nov 24, 2011
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]......................
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Feb 1, 2009
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.
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Jan 20, 2010
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?
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Apr 17, 2011
I'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.
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May 27, 2009
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.
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Jan 11, 2012
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]......
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Feb 9, 2011
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!
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Aug 3, 2010
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"
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Aug 4, 2010
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.
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Feb 9, 2011
This 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:
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Nov 19, 2010
I am doing an assignment for my programming class in which we have a text document full of names (one per line), and we set up a program with a textbox, button, and listbox. The user enters a name in the text box, clicks the button, and it searches the document for the name. If it's found, the listbox should say so and list the line number.I can get that working no problem, but the assignment also requires informing the user if the name can not be found, and I am not doing something right with that.My code is as follows:
Quote:
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim inputname As String = TextBox1.Text
Dim linecount As Double = 0
If I remove the three bolded lines and it finds a name, it will work fine to the point that it informs as such and tells what line it is on, but it won't inform the user if a name wasn't found, which I need. I thought adding those three bolded lines would help, but when I have them in there, it will incorrectly display "Name not found. " no matter what name I type in the box, even if it is in the text document.
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Apr 14, 2012
How do I use a StreamReader to read the data (from a text file), parse it, and place it in a two dimensional array??
The data:
0,710,887,1130,525
710,0,1510,1610,515
[code].....
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Dec 7, 2010
I have a comma delimited text file with the U.S. States and their respective state bird listed in the following format.
"ALABAMA", "YELLOWHAMMER"
"ARKANSAS","...
"...
What im trying to do is parse the rows and send the parsed data to different comboboxes. I have a combobox for states and one for birds.I can load the file into the first combo box but im not sure how to parse and send the second column to the second combobox. here is what i have so far.
[Code]...
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Jun 11, 2011
magine there is search box (textbox), and below there are a search button with a rich text box.My text file located in the drive C is like this: [code]I want to search only two types of items in my text file located in drive C, namely: Construction and Non-construction. When the user will type a product name, OR size, OR whatever, he must get results only for the Construction or Non-construction. The user must not get results for the Food. And the user can make misspelling of words in the search, so the Search box must tackle it. And yes, the results should appear on the rich text box on the form itself.What is the code of doing the Search according the criteria above? All I know I have made a srteamreader code but when clicking on the search button, it is giving me all the texts i wrote in the text files. However, I want only some lines to be read.
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Jun 12, 2011
How do I know if I have reached the end of file using streamreader. My file has a lot of empty lines in it.
So if it try to use the following, its just stops wherever an empty line appears.
[code] while ( Not line is Nothing) do.... end while [code]
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Jul 23, 2009
Using vb 2010, How can I use the streamreader to read within a rtf file from one pt to another pt thus capturing specific txt then loading it into a datagrid
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Nov 19, 2010
for some reson stream reader is failing, i have made a simple program that creates opens and edits files but the open, save as is not working for some reson here is my code:
open:
Private Sub OpenToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles OpenToolStripMenuItem.Click
Dim ofd As New OpenFileDialog
Dim fl As String
ofd.ShowDialog()
[code]....
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Jan 18, 2009
using the StreamReader / StreamWriter code. I want to store a new password in a .txt document that will later be printed. Here is the code I have so far. The code runs but I cannot find the .txt document.[code].....
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Nov 13, 2010
What is the best method to get towards the end of a file in a Stream Reader. In my case, I have data at the end I want, but the rest of the data I don't need. If the file is very large instead of reading line by line until eof, is there a better way to get to the end?
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Mar 2, 2011
I am reading data from an API feed and saving the chunks into files. When the files reach 2 MB I start a new file and write to that file. What happens now is that an entry (<entry></entry>) can get cut off at the end of a file and continues into the new file. I try and reconstruct the files by taking the last entry and combining it with the first entry of the next file but this is tedious handling the data transmission and file creation.
Do
timestamp = DateTime.Now
numbytesread = responseStream.Read(bufferread, 0, BUFFER_SIZE)
If numbytesread > 123 Then
'timestamp = DateTime.Now
responseData = Encoding.UTF8.GetString
[Code] .....
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Jul 16, 2008
I'm trying to use streamreader and streamwriter to get the data sent and received. For some reason the data isn't sending or receiving?
Server
Code:
Imports System.Net.Sockets
Imports System.Text
Imports System.Threading
Imports System.IO
[code]....
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Dec 23, 2010
how does the streamreader read the file? how do you know where its up to? how does it read the file line by line, knowing where its read up?what program do you write so that it can read the file line by line and then put the text from the file into an array?
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Feb 26, 2010
I made this tiny program that pulls in a text file data with StreamReader method. Okay how can I sort the text file alpahbetically A - Z while it comes in is this possible? [code]
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Jul 1, 2011
I'm new Visual Basic. I played around with vba in Excel for about a year, but most of it was copy-clipping code that I found online and modifying it � which taught me the VERY basics. I was recently asked if I�d like to job shadow one of our programing consultants at my work and jumped at the opportunity. So my "mentor,� Temi, has been awesome in giving me some basics, and I've learnt more from spending a couple hours a day 2 days a week for the last month with him then I have since I got into this a year ago in vba.
[Code]....
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Jun 12, 2009
I need to build a program that combines many different .doc files based on which check boxes the user selects. At first I was going to use the word.document.open(file) way, but I would rather not have to open 40 different files every time the program runs. I then turned to streamreader, which works great for basic text (after I convert the file to .txt) but I can't figure out a way to maintain hyperlinks. I am now thinking that after the streamreader reads all of the data and combines it into one string, it will paste it into a word doc and somehow search for hyperlinks and make them active.
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