I am using the following piece of code to load images as thumbnails to a FlowLayoutPanel control. Unfortunately i get an OutOfMemory exception.As you already guess the memory leak is found at line
Pedit.Image = System.Drawing.Image.FromStream(fs)
So how could i optimize the following code?
Private Sub LoadImagesCommon(ByVal FlowPanel As FlowLayoutPanel, ByVal fi As FileInfo)
Pedit = New DevExpress.XtraEditors.PictureEdit
Pedit.Width = txtIconsWidth.EditValue
[code]....
Update: The problem occurs while loading a number of images (3264x2448px at 300dpi - each image is about 3Mb's)
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.
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?
I have a small VB program written using VB Express 2008Part of it uses an Access database this all works fine using the custom classes.I want to extend it to use some parameterised settings which I have stored in a table in the same Access database .I want to load these parameters from the table at program startup, then use them later in the code as needed.In SQL I want to execute :-select parameter, parameter_value from system_ parametersthen store this in an array which I want to index on the parameter column/elementAny suggestions on how I can load this data into the array ?
I'm using the ShockwaveFlash ActiveX control in a VB.NET Windows Forms application and i'm wondering.Is it possible to load an SWF file into the ShockwaveFlash ActiveX object from a memory stream rather then from a file name?
I've noticed that the ActiveX object has such properties as "InlineData" and "MovieData", possibly these could be used.
I've also noticed someone has used Windows Messaging to send a pointer to a stream to the ActiveX control, has anyone seen this done?
Alright, for a school project i'm making a filecrypter, and i need to load the executable directly into the memory.
For those that don't know it yet, a crypter consists of a crypter, and a seperate "stub"
the crypter crypts the file, and the stub is binded to the file, and upon execution, the stub is executed, and in turn executes the file it's bound to.
I have a RunPE sub, and on itself it works fine
Imports System.Runtime.CompilerServices Imports System.Reflection Public Class Form1
I'm working with PDFs in VB.NET using a DLL I found on code project:
[URL]
My app allows you to select multiple files in a grid and print them. The files are stored in password-protected zip files, so the first step I do is extract each selected file to a memory stream that I pass to a new PDF wrapper object. Each object gets added to a queue. Then, each object in the queue is printed, page by page, as a system.drawing.image. The whole thing runs on a background worker.
Now, extracting the PDFs to the queue uses hardly any memory. But in the PrintPage event handler, when I extract the images and send them to the printer, something must be going wrong. My memory usage explodes. Each image, of course, is large because it's rendered at 300 dpi, but the memory used by each page isn't being returned to the OS and neither is it being garbage collected. In the end, if I select enough files, I run out of memory. Why?
I am pretty new to Visual Basic and am only using it to create a very simple programme. It is essentially an interactive encyclopedia where the user can type in a subject into a text box and get a form with information on it to pop up. I am not using any data sets etc. While the forms are all very simple and the code very limited there are dozens of forms involved, this was working fine until recently when I started to run into OutOfMemoryExceptionThrown every time I try to build my program and debug it. This exception started appearing sporadically with the programme sometimes compliling fine and other times refusing to but now it is every time. I have never written code to do this before so how do I got about freeing up memory? I read in a similar post that it may be connected to allocating memory and then not freeing it up again, or perhaps having too many event handlers in my program without ending them, however I am lost and don't know how to fix these problems.
I am writing some code to retrieve data from SQL Server, including an image field. I load the retrieved image data into a byte array and then convert the array into an image. Finally, I want to show a thumbnail of the image in a picturebox control on my app's form. All this works perfectly on my dev machine running windows 7, but the following code:
Dim myblankCallback As Image.GetThumbnailImageAbort = New Image.GetThumbnailImageAbort(AddressOf blankCallback) PictureBox1.Image = newImage.GetThumbnailImage(180, 180, myblankCallback, New
WebBrowser Example.zip IntroductionBecause the WebBrowser control that we use in .NET is a COM control, not all of its uses are straightforward and some of them (even those which seem like they should be easy) require that we dip into our Interop toolbox in order to properly implement them.
A perfect example of this is loading HTML content into the WebBrowser from memory, rather than a file or a URL. Anyone who's ever used the WebBrowser control before is familiar with the Navigate2 method, which tells the control to load content from a URL (or path to a file). Loading HTML content from memory, however, is a rather elusive practice because of the many steps involved in making it work.
MSHTML.HTMLDocumentYou might notice that the WebBrowser control exposes a "document" property. The object returned by this property can be coerced to the type of "mshtml.HTMLDocument" (you must add a reference to MSHTML to your project in order to make this work) as follows:
Code:Dim clsDocument As mshtml.HTMLDocument = CType(WebBrowser.Document, mshtml.HTMLDocument)
(NOTE: You will have to add a reference to the COM library MSHTML to your project to make this compile)
Once we create an instance of HTMLDocument, a whole new world opens up to us, providing all sorts of DOM access to the content of any given Web page.
If we were to create our own HTMLDocument object from memory, we could use the "write" method to write HTML content to the document from a string variable, like this:
Code:'initialize the document object within the HTMLDocument class... clsDocument.close() clsDocument.open("about:blank")
'write the HTML to the document using the MSHTML "write" method... Dim clsHTML() As Object = {sHTML} m_clsDocument.write(clsHTML) clsHTML= Nothing
WebBrowser Control ImplementationUsing the HTMLDocument returned by the "document" property of the WebBrowser control, however, is not as straight-forward. Because of the way that this object is created and initialized in memory (by the COM WebBrowser control), the "write" method fails when called as above. In order to write content to the HTMLDocument exposed by the WebBrowser control, we must first marshal the string value to a memory space that is compatible with COM. Once the string is properly marshalled, the COM interface IPersistStreamInit (implemented by the HTMLDocument class) must be used to pass the value into the object.
Interop DeclarationsIn order to pull all of this off, we must declare several Interop pieces, including an enumeration, a function, and two interfaces. The declarations for these pieces are as follows:
I always get an out of memory exception with my drawings...I read somewhere that I have to dispose my graphics to diminish the amount of memory used by the system.
I have the onPaint event and in there I call my functions with Dim g as Graphics = e.Graphics draw_all(g)
So in fact I have to dispose the e.Graphics every time he has to be repainted. Now my question how can I do that, because when I write before the draw_all function g.Dispose, that doesn't work, because he deletes the declaration of g and he doesn't know anymore what it is. If I dispose it after the draw_all function, he doesn't want to draw either.
I created a TaskBar application in Visual Studio which minimizes itself inside the system tray and show notifications to the user based on the database change. Whenever a new task assigned to the user he will notified at the system tray like a balloon popup. But whenever the applications runs for an average 15 hours time suddenly my applications crashes and shows out of memory exception.How can i debug this issue ? I can't wait for 15 hours and check for this issue? Is there any tool available to check the memory leakage of my application which can directly point at my issue? How can i generate out of memory exception to my program so it will be debugged easily and fast?
I got an out of memory exception in a photo editor thingy i was making in vb.net. The bitmap image is constantly changing, and I always Dispose() of it after it has been sent off to the other bitmap. Is it being stored in a temp folder and using up all my space on the computer, or what? It always bugs after about 8 bitmaps have been drawn.
I have a form created to act as a signature form. It will be used on an iPad via Citrix and that's not negotiable per my job so please don't make suggestions about developing it with Apple software. Anyway, on to the issue:Since this will be on an iPad I cannot use an OnMouseDown event to handle the drawing with the form. It consists of a PictureBox where the signature will occur. It works fine unless the user gets "draw happy" and starts drawing for a while. After a little time an Out of Memory Exception occurs and the program crashes.[code]
I have an application that listens for connections asynchronously. When a connection comes in, it spawns a new thread from the callback method. This works fine for up to about 13 simultaneous connections then it dies with an out of memory error. The threads that are spawned just do a CHAP handshake and authenticate then go in to a command loop where they sleep until a command comes in or a timeout occurs. I have pasted the code below. Sometimes it will not throw an error but the thread never gets spawned although the connection is accepted.
Code:
Imports System.Net.Sockets Imports System.Threading Public Class UpdateMonitor
I am working with application for Excel sheets in vb.net.My database is Sql server 2005.I am having around 8 lakhs of rows in my database and 64 columns.when I import a excel sheet for searching the Duplicate of excel sheet rows in database i get this Error System Out of Memory Exception.What is the reason to occur this kind of Error.Is it due to Excess of rows in database or coding error in Application.
As you see the code given below is not very useful. Is it possible to shorten the code. Mousewheel back and forward give the same result (next image). Keydown cannot be configured.
Private Sub Images_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load count += 1 If count + 1 > ImageList1.Images.Count Then [Code] .....
I have about 100 PNG images stored in a Resource. Sometimes I need to have the same images in an ImageList, but I do not want to store the images twice in my application, so I add the images from the Resource to the ImageList during runtime when I need them.
Is there an easier way to do this than having 100 lines of code, like the small example below?
Is there any efficient way to load all of the images that my program will use upon start-up such that when I load those images into pictureboxes during runtime regardless of what form I may be using, the images will load faster?Does that make sense?I've read about ImageLists, but do they actually load the images or is it just a way to manage image files?
i'v got a problem with the Report Viewer form .NET 2008. I'ave to get Some 100000 Records for my company for a year dump report.The problem is i get the OutOfMemory Exception on the design of report.I get only the column i need and i use a Dataset to display.
I have a desktop application in vb.net 2003. Here when we load the main screen we find an unhandled exception showing out of memory, but we are able to continue working off the form and retrieving data. It works fine, but the image is not getting loaded.In the main screen we have a background image loaded, one of the images is animated
I have some code that uses the Windows Media Player Library capabilities to get around using ID3 tags. I keep getting this error however, whenever I add 1000+ songs to the datagridview:
For Each File_FullPath As String In My.Computer.FileSystem.GetFiles(My.Settings.Path, FileIO.SearchOption.SearchAllSubDirectories, "*.mp3", "*.m4a") Dim WMP As New WindowsMediaPlayer WMP.URL = File_FullPath
[code]....
Here is the code I'm using that gets the error:The problem is I need a way to clear the WMP.mediaCollection, but I don't know how.
I want to load images into a picturebox, save them into a database and display them again in the picturebox. This is the code I'm actually having problem with:
Private Connection As String = _ "Provider=Microsoft.Jet.OLEDB.4.0;" & _ "Data Source=C:UsersclientDocumentsVisual Studio 2008ProjectsSavingsLoansCalc.mdb" rivate Sub UploadButton_Click(ByVal sender As System.Object, _ ByVal e As System.EventArgs) Handles UploadButton.Click [Code] .....
I'm getting this error message: "Type 'Connection' is not declared" On this line: oConn = New OleDb.OleDbConnection( _ New Connection().getConnectionString)
I am currently new to visual basic and I am using Microsoft Visual Basic 2010. I am trying to create a small game in which i want to use 8 images. These images are imported in my resources under images as _0.gif _2.gif up to _7.gif. I could write code for each of the imageboxes individually but i prefer doing it in an array as shown below. As you can see I use the variable "i" to run a for, next loop. picbox(i).Image = My.Resources._1 So that not every time it loads the image. _1.gif but it loads the images _0.gif through _7.gif, based on the "i" variable.
For i As Integer = 0 To 7 picbox(i) = [Code] .....
I have a 4 pictureboxes for a database I made but having a problem with loading images in to the picturebox. On my form I have a picturebox, 1 button, 1 textbox, and 1 openfiledialog.
My button click event code Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click OpenFileDialog1.ShowDialog() TextBox1.Text = OpenFileDialog1.FileName Pic1PictureBox.Image = Image.FromFile(TextBox1.Text) End Sub
I can add pics but if I don't select any image (just close the dialogbox) I get an error and not sure what to do ..or what to add. Is there any code to tell it to just close..
