I've got a program which displays a picture my harddrive on a picture box and changes this every 30 seconds, how can I clear the box in a way which will not use to much memory before displaying a new picture?
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how to display picture using the Application.startup path? i want to locate the picture in my bin folder inside my debug folder as i selected the name of the candidate in the combo box.
View 2 RepliesI am working with a picture box. I have multiple forms and multiple picture boxes. I am trying to go thru and set the default image for all of them and once i got about halfway through I am getting the following error.
System.Windows.Forms.Picturebox has thrown an unhandled Exception in the designer and has been disabled.
Exception
Out Of Memory
I am not sure why this error is happening. I have done some testing. I cannot add a background image to any other picture boxes on any form at this time. I have tried this on multiple computers. Im just not sure what to look at next.
In my project, I am trying to store the collection of Hatch styles in an array list and display rectangles with each of these styles at different locations in a picture box. I used this same approach with built in colors using code suggested from frorum members and it worked great.
When I run the following code I get an 'invalid cast exception' error on HB = ((CType(HatchList(j), HatchBrush))). When doing colors the the same code, SB = New SolidBrush((CType(ColorList(i), Color))) works fine so I think there is a problem with the format of the conversion. I left the NEW out since I got an immediate error stating no accessable new accepts this many arguments.
[Code]....
I've got a DatGridView and using CellClick I have populated a series of textboxes to display a record when user clicks but the most important part, the image wont open in the picture box I get the following message Unable to cast object of type 'System.Byte[]' to type 'System.Drawing.Image I know it must be a cast problem but I can't find anything on the subject
My code:
Private
Sub DataGridView1_CellClick(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles DataGridView1.CellContentClick
[code]....
I have a code found in Internet which does the job of displaying the contents of pixel data onto a picture box. The Code goes as given below:
HTML
Protected Overrides Sub WndProc(ByRef m As Message)
Dim myBMP As Image
Dim pal As System.Drawing.Imaging.ColorPalette
[Code].....
I'm a Visual Basic beginner. I want to replicate an existing Mac application that I have with Visual Studio 2010. As you see below, this application (Mac version)'s form has a folder picture at the center. That's a drop box onto which the user can drag and drop a folder, and the application will get its path and write it to a database when the user clicks on Add. Now, according to Microsoft's web site, the PictureBox control has a property called AllowDrop, which is what I need, except that I don't see it as you see below. If PictureBox doesn't have AllowDrop, then what will be my next best alternative to accept a file/folder while displaying a picture?
View 3 RepliesA simple database has been created in Access, which is just basically a table of text, with some images as entries. A form has been created in VB2008 Express and linked to the database. Either a combibox, text boxes or pictureboxes are linked to a column form the database. The first row entries are all displayed correctly in the relavant boxes (except for the images, which for some reason aren't displayed). If another value in the comibox is selected, the other box values don't change and there is still no images visible...
View 1 RepliesI'm using Bitmap to show picture box like slideshow using Timer. For each timer interval, I've to go for new instance of Bitmap, there System memory increases to 1MB, How to resolve this, 'BG is picture box
Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tic Dim img As Bitmap
img = New Bitmap(System.Drawing.Bitmap.FromFile(FileIO.FileSystem.GetFiles
[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 RepliesIm 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?
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]......................
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.
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 RepliesI'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.
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.
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]......
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!
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"
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 RepliesThis 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:
1- how I can put picture in tool strip and put it convert to split button without the picture go invisible when i click on it
2- how can I make tabs in the forms
3- I want to put pictures in the form in the same place For Example when the user check the radio button or when the user choose the name in the combo box a specific picture should be display?
Imports Word = Microsoft.Office.Interop.Word
Public Class Form1
Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
Dim a As String = My.Resources.picture
[code]....
I wont this in table.cell (3), from listbox2
I want to add a .ico to a notifyicon, but i get this message:Argument 'picture' must be a picture that can be used as a Icon?What is the problem? It is a .ico file..
View 8 RepliesI have VS 2008 and use VB, not C#/C++ or whatever else. I'm trying to make a battleship game, and I've decided to use the only method I can think of to control the grid. A 2D boolean array for position marking. I have the array set up, and the grid set up in the design form, but I can't figure out with all my research how to link them together. I'm writing this program to shake off the rust before school starts again, and for fun. I took VB in school last year, a half year class, so I have a foundation, now I'm self-educating myself above and beyond the class. I've searched for a way to use a picture box array to use the coordinates of the ship to .Visible=True the picture boxes. I've been working on this for 2 days straight with no results. I just need a little nudge in the right direction. The exception I've been getting with my latest concoction of code is NullReferenceException was Unhandled. I think its referring to the fact that I have no idea how to link the picture boxes into the array. Here's my code, and I'll comment where the exception is thrown:
Private Sub cmdStart_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdStart.Click
'label for GoTo statements is Tryline:
[Code].....
I have this code in my system which I use to retrieving images from a database by formatted blob. But some database records don't have pictures ([BLOB - 0 B]). list code for me to place an error picture in picture box1 when a picture is not available.
Dim bytes() as byte
bytes = (objdr("picture"))
Dim memStream as New MemoryStream(bytes)
PictureBox1.image = Drawing.Image.FromStream(memStream)
I'm using Microsoft Visual Basic 2008
How I can by clicking a button on my app. open a picture in a picturebox with MS Office Picture Manager?
View 8 Replieshow I can by clicking a button on my app. open a picture in a picturebox with MS Office Picture Manager?
View 1 Replieshow to drag and drop a picture box that it loaded over another picture box..
View 11 RepliesIn a form I have two picture box and I want to drag the picture from the picturebox to a blank picture box and have that picture pasted there, how do I do that? I'm using VB.net 2003.
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