When im using this code, i encounter an "Out of Memory" error;
If System.IO.File.Exists("C: est.jpg") = True Then
Dim fs As New IO.FileStream("C: est.jpg", IO.FileMode.Open, IO.FileAccess.Read)
PictureBox1.Image = Image.FromStream(fs)
[Code].....
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 RepliesI have a window application develpoed in vs 2008, framework 3.5, in which i have put a button.. Now where i click that button the other text boxes are filled up with the data from database thru web service.. what i want is while all text boxes are being filled i want to show an animated loading gif image till data loading is completed in all the text boxes.. i have tried to use image picture box but while data is loading gif image is displyes but in static mode.. cant see animation... i think this is because data loading and animation both are done thru one UI thread..
View 8 RepliesI 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 ?
View 1 RepliesI'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?
how load a string containing the source for a .exe strait into a process without accessing the hard drive.
Currently my code goes something like this...
Imports System.IO
Dim file As String
file = file_source
[Code]...
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)
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
[Code]....
I'm writing a program that print images in full page. I.E, I print image on A4 paper, landscape. When I print an image without rotating it (the image IS landscape), the image uses all the space of the page, and is not cropped. it is OK. The print job is about 1.5 Mb. When I print an image WITH rotating it (the image IS PORTRAIT ), the image uses all the space of the page, and is not cropped. it is OK. The print job is about 28 Mb. The images are about 2000x3000 pixels, and stored in JPEG files (about 2.5 Mb each). I suppose that the 28 Mb should be the "uncompressed" size of the picture, and 1.5Mb, the compressed size...
By the way, When I look at the task manager, my application memory usage grows by job size, which seems to be OK. It grows either 1,5 Mb if no rotation is occured, and 25-30Mb when rotation occured.
Since I can print hundreds of image at once, my print queue will grow abnormaly if I need to rotate all
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:
[Code]....
Ive been programming in VB6 for years, i figured its time for an upgrade. Here's what im doing, and what the problem is:
Im loading a bunch of pictures on top of one image. They are all PNG files, and some of the images have transparent edges, and some semi-transparency within the image itself.
So basically, i need to be able to load these images on top of the other images, and still maintain the transparency.
Is this possible in VB08? This is one of the main reasons i moved to 08 from vb6, more things possible including multithreading.
I have a picture box on SSRS. I want to load a picture to it, for exam from D:\Pictures\TV1.jpg (actually user will decide it by using OpenFileDialog)I have set the Source to external and in Value expression I tired
="D:\Pictures\TV1.jpg"
and
Also
="/<d:\pictures>\TV1.jpg"
but my picture box shows error picture in both cases.
I'm trying to set a resolution to 600 for an image.I have:
-Public img As New Bitmap(6600, 4800)
-Public gr As Graphics = Graphics.FromImage(img)[code]
I don't know whether it is simple or not because i am new to programming. my requirement is : In my vb.net winform application, the filenames of the files present in "D:Project" willbe displayed in DataGridView1 control. Now I want to load these files one after another into memory stream buffer and add the headers("ID","Name","Class") to the content in the file. Then I want to save these files in "C:" with "_de" as suufix to the filename i.e.,sample_de.csv.
View 1 RepliesI'm trying to add an bitmap image in memory to a page using a System.Windows.Forms.PictureBox object, but it's not working. Here is my
HTML
Dim bytes As SqlBytes = reader.GetSqlBytes(0)
Dim image As Bitmap = New Bitmap(bytes.Stream)
Dim picBox As PictureBox = New PictureBox()
[Code].....
I create a program that loop the images in the picturebox, now the concern is while the images is looping or changing the usage of the memory of the usage of the computer is going bigger.i mean it's added the new usage memory when picture is changing. i wanted to dispose the previous usage so that maintain the usage level, but i don't know how
[Code]...
Ok so i have an jpg image of around 8.10mbs at around 13424 x 11344 pixels, i need to load the whole image in to a scrolling picturebox, is they anyway to do this without using so much memory for example like what google maps does n cuts the image down and some how stitches it all back to gether?
View 1 Repliescreating a program in VB.NET that can make an image(.img) of a memory card?
View 5 RepliesIm trying to make an advance chat room with some cool features.
How would i save an image in memory from a stream?
How do I save an image and then reload it from My.settings
View 1 RepliesIs there anyway I can create in-memory JPEG file with a 'String' (yes with a String)?
View 3 RepliesI'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 RepliesI want to load picture dynamically within VB.NET and the following code does not work due to 'loadpicture' not existing in VB.NET.
picturebox.image=Loadpicture("tick.jpg")
i have a problem in loading an image from a file in vb.net. I have the following code in the class of my project.
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
[code]....
So, now I've exactly used this code to load an image from a path specified. Still, i seem to get a blank form when i run. im quite sure about the path and the existence of the file. Also, the exact piece of code is also available at: Draw an image : Draw Image2D GraphicsVB.Net Tutorial So, now do i have to insert a picture box to se the loaded image. Its like.. ive used the graphics thing to draw the image. so i reckoned that picture box was unnecessary.
Is it possible to load an image into a picturebox when that picture box is clicked? What would the syntax look like? It's an image that I already dropped onto the form that I would like to load into that picturebox.
View 1 RepliesFirst problem im having is that My image gets grabbed from the website but then it doesnt automatically load i have to click the PictureBox[code]...
View 5 RepliesI cannot seem to get my image resources to load into PictureBox1.I can see all the images I added as resources in the solution explorer.They are a series of PNG files with names associated with countries.I am at the beginning stages of randomly changing the image that is displayed in PictureBox1, but I cannot even get the first image to load.Here is my code so far. When I click on Button2 I can see that my array returns a random country, but no image loads.I even tried typing in several of the countries names as well as the country name followed by png (e.g. chine.png) and again no image loads.
Public Class Form1
Dim randomObject As New Random()
Dim Flags() As String = {"australia", "brazil", "china", "italy", "russia", "south africa", "spain"}[code]......
I have this url as an example: [URL] As one can see, it returns a nice picture--just what I need. Now, I need to put that "picture" inside a picture box or perhaps save it to a file. I would prefer the first as I believe it would be faster. Note the picture comes to us in a .gif format. I use vb 2005.
View 4 RepliesAlright, so I'm still working on my slot machine, and I have it all done, for the most part, just got a quick question. I don't know how to set an image in an imagebox. Here is my lame attempt. I've been pulling my hair out and searching google for about an hour now
[Code]...
I'm new in the vb.net world. The question I have is how to display an image which is in a access data base in a picturebox in visual basic(2010).
View 7 Replies