how can i release a form from memory i am using public variables in my form , & the same variables are appearing on the form controls , like text box and datagridview values
i want to use
MyForm = nothing OR MyForm.dispose
so that the form will take rebirth on next open
When a sub runs, it is using up large chunks of memory on every pass. It is loading pics into a listview. The pics are 1 to 2mb each and it is consuming 30-60mb for each one. How to release the memory once I close the form. Is there anything I can do to reduce it?
Private Sub PhotoFrm_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
For Each ImageStr As String In Images
Dim Extension As String = IO.Path.GetExtension(ImageStr)
Dim fs As New IO.FileStream(ImageStr, IO.FileMode.Open)
Dim br As New IO.BinaryReader(fs)
[Code] .....
in main form, when a button is clicked, it opens a new form which has a webbrowser. users can use it to browser some sites. if the user closed this form, it goes back to the main form. and they can click button to open the browser form again.
I noticed that one thing. if the browser form is opened, it uses much memory (which is normal because of the site it browses). however, after the browser form is closed, the memory is not released.
In the browser form, when it is closing, the webbrowser is disposed and dereferenced. and no other part uses much memory in the form. GC is called too. what else should I do to release all memory the browser form uses?
now, it is like once the browser form is opened once, the memory usage never goes down even the form is closed.
I have a main window in my project, and numerous other child widows inside the main.I have noticed that. When I open the main window occupies 1500K of memory, when open one child window then adds in occupied memory 6000K.When I open the second window doing the same. When I close the two child windows the occupied memory is not released.So What I want is to release the occupied memory when ever I close child windows.How I can do that? with some code example in vb.net if it is possible.This problem often sawing in the computers on the Local NET not in my computer (developer computer which has the SQL server on it).
View 7 RepliesIs it necessary to clear a List of String to release memory?Or is it done automatically?
View 1 RepliesI am using Rational Functional Tester(RFT) tool with Visual Studio 2010. The scripts are written in Vb.net. The application gets slower frequently and sometimes the browser gets hang..I assume the problem is in memory leakage. We are cleaning the memory of objects by calling dispose in finally but still there is no improvement. How can we increase the performance at the best in terms of memory.
View 14 RepliesAn application that has 3 Webbrowsers instantiated at design time navigates to webbrowser2 15 times every minute with a different webpage. Webbrowser2 is disposed of after each web page is received and processed. The size of the private application memory continues to grow as when the disposal was not instigated. The application memory grows to 1GB and then the program stops responding. Any suggestions? [Code]
View 1 RepliesI have a function which return the Dataset and my question is that, is dataset memory release automatic when function work finished if not please suggest me how i release memory in below sample question?
public function givemedataset()
dim keepme as new dataset
'grabbing record into dataset
return keepme
end function
Private Sub forumbrowsebtn_Click
dim getme as dataset=givemedataset
end sub
I have developed a small window application, having lot of insert and select scripts. It runs fine for 3 times but when i run it 4th time it gives me Error "Out Of Memory Exception". I observed that in my task manager Sqlserver.exe process occupies memory around 167000K. Then I killed it. and again run the code, this time it occupy 12000K memory. Again I run it...the memory increases and stops at 87125K. All It means i the C#.net objets are not disposed well.
I have tried for
GC.GetTotalMemory()
But failed? How can I release objects?
I am developing an application using Visual Basic .NET 2005. The application works fine in the PC which Im using to develop it. I make the setup.exe I install the application in other PC and the application doesnt work but it I replace the app.exe with the one in my debug folder it will work.
View 3 RepliesI 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 have a form that contains a crystal report viewer. When I open this form, it runs a report. I am using a .LDB viewer to tell who is logged into an access database. I noticed that when this form opens, the computer logs into the database and stays logged in. Even when the form is closed, the computer is listed as "logged in". If I run the report again, it just adds another instance of that same computer logged in. Therefore, it continues to pile up logins until the application is closed.
View 1 Repliesshared variables of particular form in vb.net 2005
View 1 Repliesi am using visual studio 2005 on win 7 with office 2007. i have developed win application. i am using microsoft activex spreadsheet component in my program. so it automatically creates reference to AxInterop.OWC11.dll When i run program in debug mode (open program and click RUN in toolbar it works) but if i run directly .exe (go to bin elease doubleclick .exe) it give error at loading point of that component. It says "Attempted to read or write protected memory. This is often an indication that other memory has been corrupted." An unhandled exception occurrs.
[Code]...
I want to know if I can directly read or write values in the current process in a Visual Basic 2005 Windows application. Like *(DWORD*)(0x123456) = 1; in C++ will write the value 1 at the address 0x123456. So anyway to do the same in VB using only built in functions and not using ReadProcessMemory and WriteProcessMemory?
View 1 RepliesWe have an application that has a memory leak. The leak occurs when we run batch processes that utilize objects in a COM library (ArcObjects by ESRI). It's not real noticable when the batch is small, but when it gets into several hundred interations the memory leak gets into the hundreds of megs.
We've looked over everything and made sure we're doing Using... End Using where possible. We've made sure all our objects implement iDisposable and explicitly dispose of their COM references in the Dispose method. We've put in explicit calls to the garbage collector. My development lead has fretted and pulled his hair out on this one for two years. Still the leak remains.
Today I noticed something strange. I ran a large batch process and the app had grown to several hundred megs in size. I had the task manager up with the app - looking at them at the same time. I moused over the 'close' button on the app and suddenly the app dumped about two thirds of it's RAM. Mind you - I didn't actually press the close button, just moused over it.
So something happened inside the app that caused it to clean itself up, but I don't exactly know what. If we could find out what happened maybe we could plug this leak.
It's several years since I last used BitBlt and the like in VB6, and I'm just refreshing my memory with a little sample app before using it on the current project I'm working on in VB2005. I've come up with the following:
[Code]...
I'm building SQL statements with a bunch of values from a dataset. Obviously that gives some really long names to put inline or even in parameter. addwithvalue code so beforehand I just declare a bunch of variables with really short names and assign them to the DS's exact fields like: [code] but this way I'm putting all the data in the dataset into memory twice by copying it into a new variable, right? So I was thinking, if it's just a string variable representing a field on the dataset, why not declare it by reference so the variable is basically a handy nickname pointing to that field in the dataset.Will it even work to have a string declared by reference and connected to one value inside of a dataset? And if so, will that stop duplicating everything in memory? I forgot how to declare a variable as a reference to another variable instead of the normal way in VB.
View 12 RepliesI have spent quite a while trying to solve this problem.I would like to be able to decrypt a file using an old password, then encrypt the file with a new password in memory. I could easily write the unencrypted file to disk then encrypt the file with a new password, BUT I was trying to keep the unencrypted file from being written to disk. Could someone point me in the right direction?
Private Function ReEncryptFile(ByVal PathToFile As String, ByVal OldPassword As String, ByVal NewPassword As String) As Boolean End Function I've been using a cryptostream to decrypt the file, but I cant seem to figure a way to encrypt the crytostream afterwards (or convert it to a memorystream and (re)encrypt the memorystream)
how can we or can we import data from PC RAM, and stored it to data like text or grafik...
View 6 Replieshow to avoid this error?"Insufficient memory to continue the execution of the program "i always got this error when i trying to execute or run my program.. it come to the point that time error will appear.
View 2 RepliesI've made a screen capture program, and I have a program to play back the captured clips (right now there's no sound). All of the data is stored like so:
[Code]....
what is the best way to identify memory leaks from a vb.net 3.5 windows application.
View 1 RepliesI am using Visual Studio 2005 with Service Pack1 installed. I am working on VB.Net project. However I am constantly choked up even I am in editing mode, i.e., I am NOT in debugging mode. Here is what bothers me:
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I have a VB.net 2005 app using the Microsoft.Office.Interop.Excel.dll version 11, deployed on a number of XP machines with Office 2003 installed. On one and only one machine I get the following error:Error -2147467261 Attempted to read or write protected memory. This is often an indication that other memory is corrupt.The line which triggers the error is:
xlSheet.SaveAs(strPathXLS)
xlSheet has been previously defined by
Dim xlSheet As Microsoft.Office.Interop.Excel.Worksheet
This should save an Excel file in a folder on the desktop. I can save a file from Excel in that folder, and create a new Excel file in it from the right-click option. The app is working correctly on the development machine and at least 8 other XP boxes on site.All Office and dotNet 2 updates have been applied.Office and dotNet have been uninstalled and reinstalled to no effect.
currently i have a tab control. i want to make a task bar like program to tell me how much each tab is using as if each tab was its own form
View 5 Repliesi have two forms : Form1 and Form2..when i start application form 1 opens up, the memory usage is 10MB then i open form 2 and close form 1, the memory usage is 25MB.Again i close form2 and open form1, then the memory usage is 30MB.Why is this so that form 1 has different memory usage at different times...?
View 6 RepliesI create form with listbox that have data and show new memory form when radiobutton selected . All this work perfect fine, but not code in AddHandler for listbox SelectedIndexChanged . In procedure of addhandler, I see error "name 'lbox' not defined" when I try set global variable to SelectedItem . Code I use I show for you below . Why not this work ?
Private Sub RadioButton4_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RadioButton4.CheckedChanged
Dim f As New Form 'Create a new Form
Dim lbox As New ListBox 'Create a new ListBox
[code]....
why I have error of not defined "lbox"?
I am a project analyst emrpesa software and recently in our systems. Net that are still
a minority began to System.OutOfMemoryException.
I have many forms in my project. When the project starts to run, the form named as˜frmMawill be loaded. I had given links to load other forms from this form. When other form gets loaded I want to close this main form. To do so I used the following
View 3 Replies