Cut Bitmap Into Smaller Files And Showing On Screen?
Jan 4, 2011
I am trying to take a png file (around 2000 x 2400) and split it into 8 smaller images of 500 x 1250 each (2 rows of 4), each of which is saved as a png file. I then which to display these smaller png files in a picture box so that they look as if they were one image.
My problem is that when I display the png files in the picture box, lines that look like grid lines show up in the picture box at the points where the png files sit next to each other.
When I view the smaller png files in Paint it appears as if the left column (x=0)and top row (y=0) of each file is set to clear (or transparent). What shows up in the picture box is the background colour of the picture box.
This clear/transparent row and column are not added on to size of the smaller png files. They are still 500 x 1250.Not every file is affected. If the smaller files are created from the original bitmap in the following order[code]...
I am looking for assistance writing code, (VB 05), that would cause an object, (like a circle on screen), to get larger and smaller over preset periods of time, (about ten second increments).
I have a large file (2.7GB). I need to split it into smaller files. How to split a large file into smaller files using VB.NET 2003? Cannot use LINQ and the resources (cpu and memory) on operating environment are very limited (it is a shared hosting environment).
I've a word file i open using the word object library.... now i need to split it into a number of files divided by the numbering, ie the file is in the format[code]...
My program has 1,000 + .rtf files and when I publish/Install it's HUGE! 200mb +. I have other apps from other software companies that have more documents than mine, and their entire application is around 50mb. What am I missing here? How do I accomplish the same thing? Does it have to do with the Property Settings of the .rtf files called: "Build Action" and "Copy to Output Directory"? I set my "Build Action" to "Content" for all my .rtf files, and set "Copy to Output Directory" to "Copy Always".
Edit: Fixed, I created a compatibleDC for the graphics object, and a handle for the bitmap (using b.gethbitmap), then used the SelectObject function inside GDI to select those two, and used the compatibleDC instead of hDc in the BitBlt function I've been trying to draw a bitmap to the screen (device 0), however I have encountered a problem copying the graphics using BitBlt.
Initially, I was drawing directly to the desktop using SetPixel (gdi32), but it was slow, so now I am setting the pixels of a bitmap object and then creating graphics from that object, and copying the hdc of the graphics to the screen.My guess is that I am adding the HDC of the graphics object to an intptr, which essentially gives me the HDC of the container of the graphics object, which is not what I need. However even so, I have not found any information on how I could copy a bitmap to a device other than using BitBlt.
This is my current code (Windows forms app, textbox, button) The textbox is the device to copy to, and the button starts it. For testing purposes, set the textbox text to 0, and press the button. You should see a black box (50x50px) in the top left corner of your screen. The colour should be blue if it is working correctly:
Public Class Form1 Declare Function GetDC Lib "user32.dll" (ByVal hwnd As Int32) As Int32 Declare Function ReleaseDC Lib "user32.dll" (ByVal hwnd As Int32, ByVal hdc As Int32) As Int32
[code]....
The way it works is it calls the function setpx, given a location and color from within a loop iterating through all of the pixels in a box (50x50 in my code). The setpx function will then call the setpixel fuction on a bitmap b. This part is working fine.Next, it will define a graphics object g from the bitmap, and I use BitBlt to copy g's hdc (g.gethdc) to the screen. This is not working correctly?
Trying to set the viewable area to a smaller screen area and have it cycle through as the person moves using collision detection to move the backgroudn image. Here is the start but its off to a bad start so far.
Public Class Form1 Dim Mapx As Integer = 600 Dim Mapy As Integer = 2000
[code]....
Basically the forum size is set to 600x2000 but the client should only allow you to view 600x600. I want it to add +1 once you "collide with a invisable box I'll add and this will redraw the screen.
I created a bitmap, that is supposed to be displayed on the screen, in the middle. It will have to be on top of EVERYTHING!! Even if a full screen application is running, I want it to show. My questions are: Is it possible to even display a CUSTOM MADE bitmap on the screen?
Option Strict Off Imports System.Drawing.Drawing2D Imports System.IO[code]....
I'm looking to make a program that would capture your whole screen, then have the picture display on the screen (simulating a frozen screen) to where the person handling the program could select a partial segment of the screen with their mouse and then save to a folder. 1. I have no idea how to go by doing this 2. My form is constantly minimized, so I have to do it without MouseDown on the form and whatnot. How would I go by doing this?
There is Bitmap data on the clipboard from a screen capture. If I paste it into a RichTextBox it works OK. That is, if I remove the first two lines below.
Dim clipboardDataO As DataObject = CType(Clipboard.GetDataObject(), DataObject) Clipboard.SetDataObject(clipboardDataO) RichTextBoxTxt.Paste(DataFormats.GetFormat(DataFormats.Bitmap))
However, If I capture the clipboard data and restore it before I paste I no longer get my bitmap displayed in the box. My problem is, in the real situation I need to use the clipboard before I paste which is why I save it and restore it above.
1) Do you know why restoring doesn't appear to work here? 2) I can't paste before the save/restore. Is there something else I can do?
I'm trying to create a DLL with some useful methods and subs for my use. But when I tried declaring an object for Form or using the keyword Screen, Bitmap, etc.. gives an error saying that "The type 'Screen' is not defined" and like that..
I made this splash screen and since I just started working on my project, the app takes less than two seconds to load and the time for splash screen is not enough? I have tried to put System.Threading.Thread.Sleep(5000)but where? I put it in the code of the splash screen, then it waits 5 seconds before showing the splashscreen and I put it in the main program, then the splash screen is out THEN it waits 5 seconds after the splash screen is gone then it loads.
I've automated some things on my computer with some mousecommands. This works perfectly. However though when I'm away for a couple of hours and I've got my program running (which is needed) the screensaver won't kick in due to the mouse movements. Is there any way to bypass this? So that a black screen is showed but the program still does its work.
I'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
I am very new to programming and I am having trouble getting my code to work properly.I am trying to write what I thought was a simple program, but I everything I have tried has not worked properly.I am creating a utility that will take installation and database files from one computer and copy those files to a flash drive so the flash drive will have the new version. The flash drives in question would either have one of two previous versions of the software on it or it will be blank. I decided to do this in two steps. First I check the computer for the new database and the flash drive for the old ones. I do this with the following code. [code] Next, I am deleting files from the flash drive if the old database is there and copying the files from the computer to the flash drive and showing progress on the progressbar. Here is where I am going all wrong. I have tried it a number of different ways, and unfortunatly (I'm kicking myself right now), I have not saved the code from the other methods I have tried.I have not been able to figure out how to get the background worker to work with what I am trying to do, though I have seen a lot of code over the past few weeks with examples of how to use it. It is a little above my head in terms of figuring it out by myself. So what I have used is the following code: [code]
I am trying to write what I thought was a simple program, but I everything I have tried has not worked properly.Here is what I am trying to do... am creating a utility that will take installation and database files from one computer and copy those files to a flash drive so the flash drive will have the new version. The flash drives in question would either have one of two previous versions of the software on it or it will be blank. I decided to do this in two steps. First I check the computer for the new database and the flash drive for the old ones. I do this with the following code.
Private Sub VerifyButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles VerifyButton.Click VerifyButton.Enabled = False
how can i create a monochrome bitmap from a semi transparent bitmap in vb.net? the bmp is for a transparency mask image for an icon i'm trying to create with the CreateIconIndirect API function.
i'm using vb2008 .Net3.5, but i would prefer an answer that would also work in vb2005
So as it says in title i need to copy several files from one folder to another. But i dont need to copy folder with files. i need to copy several files to another folder..
And show progress in progressbar.. is there a way how to do it, cos i found only how to copy 1 file showing progress..
i have a vb script that is imbeded in an html page (hta). when i use the common dialog flags = cdlOFNAllowMultiselect the file list is present in the filename object and are separated by a space. however when i use dialog flags = cdlOFNAllowMultiselect Or cdlOFNExplorer the files that i selected on the dialog box, are not present in the filename object. the only thing that's there, is the path to the files. here's the code:
I have a grass image located here in my directory. I want to just create a Bitmap, but I am getting an error. (Parameter is not valid.) Immediate Window: A first chance exception of type 'System.ArgumentException' occurred in System.Drawing.dll
BTW this issue occurs in any MS office program when the VB.Net (or even VBA) is processing information.Example: In Excel, a worksheet is displayed on the screen. I start either, a VB.Net or VBA procedure and within 30 seconds the Excel worksheet (previously displayed) blanks out. In both VB.Net and VBA,ScreenUpdating = False. My expectation is that the previously displayed screen would stay static as if I left my desk to get a cup of coffee; came back and the same ole Excel worksheet was still there?Of course, setting VBA Screen Updating = False accomplishes two goals: 1) speeds up processing and 2) saves the user from seeing unnecessary "garbage-processing" steps.Why does VBA or VB.Net ScreenUpdating = False not freeze the screen at the time of its invoking?
I'm making an app with several forms and wanted to add a label to each form that, when double clicked, would resize the form to 10 x 10 pixels.
ControlBox, MaximizeBox, MinimizeBox, properties are set to false so there is no title bar. No text or icon. MinimumSize is set to 0,0.
I made a new project that consists of one form with one label to make sure there was nothing in my code causing the problem but still every time I double click the label the form is resized to 27 pixels high by 112 wide.
i made a webpage with a drop down list...so when i click on the drop down list and click on the item there, a box will pop out i dont want the browser box to be the standard maximize internet explorer browser size or standard minimize internet explorer browser size...i want it to be in a A9 or A10 paper size the moment I select an item and it pops out...
