Classes, References To Save Memory?

Jul 2, 2011

I have a class as follows:

Public Class Courses
Public CoursesOfferedMAIN As New List(Of Category)
Public CoursesList As New List(Of Course)

[Code]....

There is no problem with the code how ever, I would like to know, in the process I am following, the number of subjects, couses, examsets etc would all get repeated in the specific type lists like SubjectsList, examstypelist etc.. since they are being copied over it would take more memory.

Hence, my question or doubt would be, is it possible to use the same as references instead of copying them over to lists to save memory, or are there any methods better than this?

View 1 Replies


ADVERTISEMENT

.net - Memory Leak And Weak References?

Oct 27, 2011

I'm having an issue which looks like a memory leak in one of my applications (the application uses more memory over time, an after about a week of work it hangs). I've detected and fixed some leaks related to classes I've written (comparing heap dumps taken with sos.dll revealed them quickly), and those no longer increase in number.

Currently, the only thing that dramatically increases over time are WeakReference instances, which increase at a steady rate of 1,000 new WeakReference instances per minute.My code doesn't use WeakReference directly, I never create those myself.

What could cause so many WeakReference instances to be created? I'm using VB.NET, Visual Studio 2008 and .NET 3.5

View 1 Replies

VS 2008 Insert References From Application Settings CrystalDecisions References Are Missing

Mar 9, 2011

I have Crystal Reports 2008 installed on my win7 laptop but when i go to insert references from my application settings the CrystalDecisions references are missing and im not able to find them. Note: they do exist in my "c:windowsassembly" folder.

View 3 Replies

How To Save The Result On Memory

May 4, 2009

I wrote a program which has 4 different menus. Each menu does some kind of calculations by first read numbers from binary image file and then writes the output file. I was wondering if I could output or write to memory instead of outputting to a file.

If that is possible then I think I could do all with one click instead of using 4 different menus (or forms).

View 4 Replies

Save Input In Vb Memory ?

Mar 26, 2009

Actually i'm doing my assignment on Vb interface... Parking and Retrieve System.. the problem is, i don't know how to save the input inserted by user (displayed in display2.text) into any memory in vb..

Example: if user key in "abc123", then how can i save the data into vb memory repeatedly? is it possible for me to use "savedialogfile"?

Here is my code:

CODE:

View 4 Replies

VS 2008 Save Image In Memory?

Mar 13, 2010

Im trying to make an advance chat room with some cool features.

How would i save an image in memory from a stream?

View 1 Replies

Save Data To Memory Card In HTC Viva?

Aug 3, 2010

I'm trying to do an application for a HTC viva PDA, and i'm a begginer in visual basic programming language so i don't understand much of it.The application is intended to receive data from a data aquisition equipment that connects with the PDA trough bluetooth, i managed to receive data in the PDA, but i don't know how to save all the data that comes from the data aquisition device in a Microsoft excel format or in any other format i can work with.the code that is needed so that the software saves all incoming data to a excel file in the memory card of the PDA?

View 6 Replies

Save PDF Document Seems To Be Keeping A Reference In Memory?

May 25, 2011

I have a VB.NET user control that is saving a PDF document and then displaying that in a WebBrowser control. The code looks like this[code]...

View 2 Replies

Vs2010 Save Image Memory Leak

Oct 5, 2010

I'm basically making an app to take screen shots in a game as I chat. There will be a bit more to it later, and I will likely be using PNG but that is besides the point for now.Whenever I take a screenshot and save, doesn't matter If I am saving converting quality or using system.drawing directly, the memory use goes up about 1.5MB per save. I'm rather new to VB.Net so I can't really figure out why...as far as I can tell I release everything.[code]Ihave tried setting it to nothing with no luck, and aside from that memory slowly goes up per time Enter is pressed. I'm not sure why data would be saving to memory when Subs and Functions are supposed to release data after use?

View 1 Replies

Use LINQ To Filter Collection Of Nested Classes To Yield Dictionary Of Unique Properties Of Those Classes?

Jan 23, 2012

I have two classes, one nested in the other. [code]Neither "Name" or "ID" are unique between operations and records.I wish to construct a dictionary using LINQ = Dictionary(Of String, Of List(Of Integer), whereby the keys are uniqe examples of Names in my collection and the values are the collective set of distinct IDs that are associated with those names.

View 2 Replies

VS 2010 Structure Classes So That The User Interfaces Though A Single Class While The Supporting Classes Are Hidden From Their View?

Jun 13, 2012

How can I structure my classes so that the user interfaces though a single class while the supporting classes are hidden from their view? I think its best understood in an example:

Public Class MyInterface
Public Economic as EconomicClass
Public Sub New()
MyBase.New()

[code].....

So you might ask why am I even separating them? It's strictly for others who will be working with this interface. I need to funnel them though a logical structure:

interface.Economic.MyMethod
interface.Currency.MyMethod
etc

This way everything is already handled for them in the background and they only need to run the method they need. I don't know if I can have it both ways in VB.NET.

View 23 Replies

VS 2010 Calling Subs And Functions Within Classes That Are Within Classes?

Oct 24, 2009

Here is some example code of what I mean:

vb
Public Class Form1
Private Sub Button1_Click(ByVal sender as Object, e as systemEventArgs) Handles Button1.Click

[Code]....

View 5 Replies

Derived Classes Cannot Raise Base Classes

Jul 10, 2009

I m trying to raise Click event of Textbox explictly but I m getting "Derived classes cannot raise base classes" error.[code]....

View 1 Replies

Loading An Image From A Jpeg That Exists In Memory (but Not On Disk) Using Direct Memory Access

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.

View 10 Replies

Attempted To Read Or Write Protected Memory / Often An Indication That Other Memory Is Corrupt

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?

View 12 Replies

Attempted To Read Or Write Protected Memory. This Is Often An Indication That Other Memory Is Corrupt

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]......................

View 2 Replies

Attempted To Read Or Write Protected Memory. This Is Often An Indication That Other Memory Is Corrupt?

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.

View 6 Replies

Necessary To Detach Event Handlers To Ensure That Memory Is Cleaned Up And That There Are Not Memory Leaks?

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?

View 1 Replies

Thread And Memory Leaks - Memory Usage Jumps About 1000k And It Never Goes Back Down

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.

View 6 Replies

2008 Express Edition: Attempted To Read Or Write Protected Memory, This Is Often An Indication That Other Memory Is Corrupt?

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.

View 4 Replies

DirectoryEntry Memory Leak - Gets A Out Of Memory Error In The Last Catch Statement?

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]......

View 3 Replies

Read Or Write Protected Memory Often An Indication That Other Memory Is Corrupt?

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!

View 13 Replies

Form-printing Class Error - "Protected Memory Was Tried To Be Read Or Written. This Often Indicates That The Other Memory Is Damaged"?

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"

View 1 Replies

Loop And Enumerate Properties Of Nested Classes In Nested Classes?

Sep 24, 2010

so far i got

code
For Each item As Reflection.FieldInfo In GetType(NameSpace.ClassWithNestedClasses).GetFields
rtfAppend(item.Name & ":" & Tab & item.GetValue(Me))
Next
For Each item As Reflection.PropertyInfo In GetType(NameSpace.ClassWithNestedClasses).GetProperties()

[code]...

which gets me the simple string vars and properties of my top class, but how can i apply this to loop through all sub classes and get there vars and props?

View 1 Replies

"Attempted To Read Or Write Protected Memory. This Is Often An Indication That Other Memory Is Corrupt"

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.

View 2 Replies

Memory Leak - After About 6000 Of 1,250,000 Images In ##X It Throws An "out Of Memory" Error

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:

View 5 Replies

VB XML Classes Vs String Classes?

Oct 13, 2011

Searching the internet finds no less than 700 different ways and opinions to accomplish what I'm trying to do, and I would just like to know the simplest, most bullet-proof way possible.

[Code]...

I simply want to extract the string "bar," which is inside <hostName></hostName>I can do this easily enough with simple string functions, but I'd like to do it with one of the .NET XML classes/methods.

View 2 Replies

Add References From Another Project?

Jun 20, 2011

I want to add References from my another project. How Can I do that.

View 3 Replies

Best DI-IOC References For Programmer?

Mar 29, 2010

I code primarily in vb.net. I've been doing basic dependency injection manually and am looking to learn more about DI/IoC and maybe use a DI/IoC framework/container like Ninject. There are lots of examples and write-ups using Java and C# code. I'm looking for the best resources for vb.net programmers. Likewise, is there a particular framework that would be easiest for a vb.net programmer to pick up?

View 3 Replies

Find The References To Add?

Mar 27, 2010

I am trying out Modi but i cant seem to find the references to add. I have office2k7 but cant find Microsoft Office Document Imaging 12.0 Type Library in com tab. Also cant find the dll in C:Program FilesCommon FilesMicrosoft SharedMODI

View 2 Replies







Copyrights 2005-15 www.BigResource.com, All rights reserved