Take A Snapshot Of A Portion Of The Map And Dump It To A Bitmap?
Feb 4, 2009
I have a third party GIS tool that I'm using to view maps with. Occasionally we have to take a snapshot of a portion of the map and dump it to a bitmap. The third party tool has a function that will give me the upper left and lower right coordinates of the area selected on the map. These coordinates come out as system.drawing.point objects.
The two point objects are then used to generate a new system.drawing.size object that will give the height and width of the area selected. The height and width values are passed to the constructor for the system.drawing.bitmap.All this works fine most of the time. Sometimes, however, when the user selects a particularly large area, the bitmap constructor bombs with a 'parameter is not valid' error. There isn't any documentation on this error, but I'm assuming it means the height and width are too big.
So what I'm wondering is... is there some way to check my height and width values prior to creating the bitmap and make sure they are in acceptable bounds?
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Dec 13, 2010
I am trying to take a snapshot, or a copy of a control, for a bitmap. I'm wanting to do this to a listbox, but part of the listbox may be hidden.On the mouse_down event I need to get the snapshot of the whole listbox (even though parts may be hidden behind other controls, I need the whole listbox) and draw it to the screen in the same location as the original listbox (but the hidden parts still stay hidden behind the other controls on the bitmap).
On the mouse_move event I need to move the snapshot up/down based on mouse movement. This also moves the listbox up/down and this code is done. I will just move the snapshot of the listbox the same way as the original listbox.On the mouse_up event, I will dispose the bitmap and display the original listbox again.
I am doing this because moving a listbox up/down is really messy. It's a custom drawn listbox and looks horrible moving, so I figured if I could snapshot it, move the bitmap while visible, and listbox behind the scenes, it will flow smoothly and no one would notice I am scrolling a bitmap instead.
Double buffering the form and listbox didn't help . I've done some graphics.drawstring before, but not much on other graphics.
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Jul 3, 2011
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
[CODE]...
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Dec 15, 2010
I'm trying to use a ToolTip directly to a Bitmap Object (System.Drawing.Bitmap), aparently I can't do this because Bitmap isnt a Windows Control.
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Sep 17, 2011
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
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Aug 4, 2009
I need to capture image from WebCam in my .NET application which should work on both Win XP & Vista. While creating this thread, the forums suggested me 3 links that were helpful. I though I got the answer from one of them, but it worked spcifically on Win XP, not Vista.
I jus tneed to capture an image from the WebCam, rest all processing of the would be handled by my .NET code.
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Dec 27, 2010
I'm trying to take a snapshot of a website and show the snap shot in my picturebox.
the only thing on my form would be the picture box and a button to take a snapshot.
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Apr 10, 2009
I would like to be able to take a snapshot of an whole RTF document displayed on screen (and also whats not yet displayed below screen) and save it as a JPEG image, but I cannot work out code to do this in VB.NET.I can do it all manually by displaying the document on screen, highlighting all text displayed and copying it to the clipboard. Then I can paste it into 'Paint' and save it as a JPEG. But I would like to be able to do this programatically inside my program.
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May 31, 2012
How i can take snapshot of webbrowser and save it to C:file.png
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Jul 16, 2009
Basically I need to be able to take a snapshot from a webcam.The webcam is known so I know what cam I am looking for and what I wish to connect to and it will be there but I can't find out how to take a snapshot from it and then be able to save it as a jpg?
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Jun 11, 2009
I have been using the VB2008 express edition following Bob Tabors's 18 course lesson in VB 'snapshot 5'. I was starting lesson 14 on the RSS reader. This lesson adds the .mdf for the first tome. The .mdf file was unable to be opened due to some message about code 603?. The final requst is that the database be recreated. What would you suggest. I was not expected to run into this problem so quickly in the learning process. so be it
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Jun 11, 2009
I need to take a snapshot of a form which is not necessarily visible on the screen. I need to save that into a Bitmap object. I cannot use Graphics.CopyFromScreen() because if there was anything obstructing the form, it will appear in the snapshot taken.
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Mar 11, 2010
i have seen google chrome, whenever you open a new tab, it will show you the last 8 pages that you have visited. I want to do a similar thing, except i have a vb.net code behind the .aspx file, which shall give me a list of URL's called form the database. When the page is loaded the URL's are displayed on it. what i need my code to do is to pick up these URL's, on the background open a web browser, take a snapshot of it and save it, and display it on the screen. dont recommend IFrames cause I need a snapshot and not an actual running site in the small snapshot.
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Sep 17, 2009
I've been using some memory profilers to try and track down a memory leak - but am swamped with posibilities.
Am wondering if anyone has a function to dump all memory allocations that are present as a form closes/disposes.
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Jan 12, 2012
I am trying to view all the properties of this:
Dim IISOBJ = GetObject("IIS://LocalHost/W3SVC/1")
For the life of me I can't figure out how to display all the property names of this object.
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Nov 8, 2010
This current project involves dumping parts of WinAD objects into a db to search from.I am trying to make this go a bit faster. there could be 10s of thousands of records to create.So i figured threads would do the job.I have tried straight of creating new threads for each db insert. that does not work for long, after 1700 threads it crashes.
t = New Thread(DirectCast(Sub() MySQLLib.group(dmn1, grpn1, grpd1), ThreadStart))
t.Start()
[code].....
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Jan 8, 2010
I'm building .NET application that uses DirectX API for web camera device I'm using DirectShowNet Library .
i want to capture the image when user clicks the snapshot button available on webcam.and then dispaly the image in picture box.pls help me out iam stuck with this issue.
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Sep 11, 2010
I have already incorporated DirectX into a program and set the owner to a picturebox which so far works great, but all it does is set the place/dimensions of the directx window to the picturebox... it doesn't actually USE the picturebox for the video so if i pause the video or set a timeframe I can't use the picturebox frame/image to pull information from. So what I want to do is when i pause the video at a certain frame I want to be able to actually take a snapshot and populate the picturebox with that image and then be able to save/manipulate it like a normal picture. I have read some examples and coding on screen snapshots using DirectX.3D, but not audiovideo. Not sure if its the same or what. I know normally you would start out with CODE, but in this case I have NO IDEA exactly where or how to start it.. I tried Bitmap options with the screen area/location, etc... but was getting errors and exceptions..
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Feb 1, 2011
Is there a way in .NET (VB.NET or C#), when an exception happens, to dump the stacktrace of each thread? Basically I would like to reproduce what happens in Visual Studio's Debug->Threads window to see what each thread was doing when the exception happened
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Jan 20, 2012
I use this code to create dump files of my database.Now what I want, if possible, is to encrypt it so that when it is viewed in notepad or anything similar, average users cannot read it.
Code
Call isDirectoryExist()
Call createDbBackupName()
Dim myProcess As Process = New Process
Dim strUser As String = "superadmin"
[Code]...
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Jul 16, 2009
I know it sounds an odd request, but in order for others to gain access to an executable's VB.Net source code long after I have left the project I wanted to add something that could output the source code to notepad. This would be triggered by calling the exe with a numbner of parameters passed, like a pass phrase.I know how to pass the parameters and can call a proc based on what is passed, but I don't know if it's possible within that proc to dump the entire program's source code to notepad.
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Jun 1, 2011
How to search a dump.bin for a pattern then take the point it is at, i.e. 8DB358 and search that string? urls...
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May 26, 2011
Here is a short program to demonstrate my question. I just want to extraxct a rectangle bitmap from a big bitmap.Code as follows:
Private
Sub Button3_Click(ByVal sender
As System.Object,[code]....
Execution stops when hitting the Dim cloneBitmap statement, which should have created a bitmap out of the rectangle cut out.The message is:
"MissingMemeberException was unhandled.
No default member was found for type 'bitmap"
I just don't get it. Seems that the method Clone(Rectangle, PixelFormat was not found.
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Feb 10, 2010
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
[URL]
private void Form1_Load(object sender, EventArgs e)
{
Bitmap bmp = new Bitmap("grass.jpg");
}
bertino
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Jul 28, 2011
I am getting data from my database and I want to have that data as a table in excel file.
So, I have written the following :
[Code]...
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Feb 15, 2012
I have this code which saves the dump file in a static path or destination Process.Start("C:xamppmysql inmysqldump.exe", "-u root ipoint -r C:Backupipoint.sql") MsgBox("Backup Database Created")
I want to choose the path by using the folder browser dialog which will put the path on a textbox but this code below doesn't work Dim path2 As String = tb_path.Text Process.Start("C:xamppmysqlinmysqldump.exe", "-u root ipoint -r '" & path2 & "'ipoint.sql") MsgBox("Backup Database Created")
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Jul 5, 2010
In Windows 7 if I launch Task Manager and select a process (eg:Notepad.exe) I can right click on this and select "Create Dump File".
This creates a dump of the file to my hard drive.I would like to do this programmatically.
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Jan 23, 2012
I use this code to create dump files of my database. Now what I want, if possible, is to encrypt it so that when it is viewed in notepad or anything similar, average users cannot read it.
Call isDirectoryExist()
Call createDbBackupName()
Dim myProcess As Process = New Process
Dim strUser As String = "superadmin"
[Code] .....
Of course, if it encrypted, it has to be decrypted before querying the dump file. I have no idea what encryption I can do in vb.net and mysql
I modified my first code
Process.Start("C:/MySQL/bin/mysqldump.exe", " --host=localhost --user='" & strUser & "' --password=1234 """ & strDbName & """ -r """ & strPath & newDBName & """, --cipher /e /a '" & newDBName & "' ")
But the output file contains nothing whatsoever.
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Jul 12, 2010
how can i dump a small html code in a variable? do i need to take array ?i need to write below line to a file "as is"
$a = "<style>"
$a = $a + "BODY{background-color:skyblue;}"
$a = $a + "TABLE{border-width: 1px;border-style: solid;border-color: black;border-collapse: collapse;}"
$a = $a + "TH{border-width: 1px;padding: 0px;border-style: solid;border-color: black;background-color:thistle}"
[code]....
how can i make VB turn off recognition of it's operative characters like $,<,>,= etc. which appears on above code but i need to dump it "as it is" in a file during runtime.
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Jun 1, 2011
I have a VB.NET 2008 program that crashes about once a month at a customer location. My log file does not include any clues of the crash, the program just dies with the infamous SEND / DONT SEND window.So I need to setup my customers so that in the event of a program crash, a DUMP file is created automatically, without any user intervention. Everything I read on internet indicates that the drwtsn32.exe program does that.
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