VS 2005 Controlling System Processors?
Jul 29, 2009
I want to control all the processes of my system. for instance, whenever i start a new process, my application has to ask me whether to allow it or not. I should have control to either pause, resume or terminate the process. for eg,if i start IE, my application should ask whether to allow the process or terminate it. if i provide "allow", the process should run, either it should terminate. Can i use "process" control to do these stuffs? Or do i need any API?
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Aug 18, 2011
Is there code or a way to distinguish Hyperthreaded processors from non-hyperthreaded processors? I know how to detect hyperthreading in general But this is whether or not a logical processor has it but not specific processors.
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May 27, 2010
What i have heard is, that a program dont get much faster on a dual core (or quad core) than on a single core processor, because windows assigns the program to just one core. (but still a little faster because other programs run on the other cores instead or something like that).And if you want to exploit the power of multicores, you have to code in a way so that different calculations get sent to different cores simultanuasly and then gather the result afterward.First of, is this correct? And if so (or if not so) is it possible to program in vb to exploit multicores. I mean can you create 4 threads and assign them to each core, or does this require some heavy C++ coding?The reason im asking is because and application i have created uses biometric identification (fingerprints) and this requires somcalculations, the more fingerprints that gets stored. Then if i somehow could make it use more codes, maybe this will be a little faster?Is this possible in vb, or would i get way in over my head for trying to work with th
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Apr 14, 2010
I have been writing visual basic and vb .net applications for years and have come across this problem with the timer component under Windows 7 32bit on dual core Intel processors. This problem only occurs with Windows 7 running on a dual core processor, single core and under the virtual pc on any processor works.
I have attached a test program to show this problem. The program uses 2 timers to count down to 0. It does not matter what type of timer component I use system.timer.timer or system.windows.forms.timer. I read the system.timer.timer may fix this problem so I changed the program to use it but it did the exact same thing. Left it in anyway.
The program: Timer1 is set to a number of ms for a given amount of time say 150000 for 150 seconds and started. The timer will expire correctly. At the same time a second timer Timer2 is set to 1000 ms for a count down display to 0. Timer2 fires and the count is updated. This happens and everything looks fine. When Timer1 fires I disable timer2 so it will stop counting down. Timer2's countdown is at 2 instead of 0. It is firing slow. If I increase the value of timer1 to say 500 seconds timer2 is behind by 6 seconds. These amounts are the same for the 2 very different computers I ran this on but both are dual processor systems running Windows 7. The exact code works correctly on Windows Xp on the same processors and works under Windows 7 on a Pentium 4 system.
[Code]...
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Aug 27, 2010
After I upgraded from Windows Xp to Windows 7 on any dual core cpu machine my programs that use a simple timer function run incorrectly. The program works with the exact same hardware under Windows Xp and Windows Server 2003. I am using Visual Studio 2005 to write .NET Visual Basic programs that use 2 timers to count down. The first timer, timer1, is set to a value say 150000 ms (150 seconds). The second timer, timer2, is set to 1000ms (1 second). Both timers are enabled one right after the other from a button click event and begin. The timer2 routine running every second updates a label counting down the seconds. When timer1 fires it disables itself and exits. Timer2 also checks to see if timer1 is still running if it is not it will stop. Under Windows Xp and Windows Server 2003 the resulting count in the label is 0 when timer2 detects timer1 has finished. Under Windows 7 when timer1 stops timer2 is not at 0 it is 3 for 150 seconds and gets larger the more timer1 is increased. It appears to me timer2 is not being fired every 1000ms as it was under Windows Xp.
I have included the Visual Basic code below. If you want to test it just run Visual Studio and create a new project. Put the buttons, numericupdown, and labels in your form and past my code into the correct buttons. I have used these type of timer events for years without any problems unit Windows 7. Windows 7 on a single core Pentium 4 with hyperthreading turned on works fine. Windows 7 on a dual core E6500 fails, Windows Server 2003 works.
Public Class Form1
Dim I As Integer
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[CODE]...
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Apr 21, 2011
a company offered me to develop a project for our attendence system in which finger recognition system is used. now i have quitely no idea that what i do and what do i do with this finger recognition system project.
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Apr 1, 2009
I'm writing an application which has user authentication system, basically, when the user open the software, he has to enter his/hers username and password which are retrieved form a access data base, and if the user is set as admin then it enable some features, I couldn't figure out how to read the column lets say, IsAdmin table, which will store an value of 1 or 0 for example. I need a concept of how build a login system with levels or whatever you guys call it...
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Dec 28, 2009
I have a project that I am working on and I just recently transfered it from an XP machine to a Windows 7 machine. Both machines are running VB Studio and the only thing that changed was I moved it from the XP machine to the WIndows 7 environment. I have not changed any of the code, I just transfered it and ran it to make certain nothing happened.
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Mar 6, 2008
I am attempting to use the System.Management.ManagementObjectSearcher class in VS 2005 (see below) but get a error message for both the ManagementObjectSearcher class and queryObj As ManagementObject - Type ManagementObjectfSearcher is not defined and Type ManagementObject is not defined. how do I use this class in Visual Studio 2005?
Dim searcher As New System.Management.ManagementObjectSearcher( _
"rootCIMV2", _
"SELECT * FROM Win32_ComputerSystemProduct")
[code]....
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Mar 6, 2012
If i want my program to exploit all cores of a processor do i need to add extra code? If yes do you know a link to a tutorial that explain how to do it in VB 2010?
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Jul 17, 2009
I have a program in VB.NET 2005. At some point I have to open an Access2003-Application for getting data in it. I do that by pretending my program is a human user and let it do all the work in Access as a human user would do. Filling Fields, pressing buttons etc. I use the Primary Interop Assemblies for that. So far so good. That code is in use for over half a year now. In the last week I got Office 2007 installed on my machine. Of course I tested the installed version of my program if everthing still works. Every test was succesfull. But if I do the same tests in Visual Studio it always crashes.
All I get is this Errormessage: {"Das COM-Objekt des Typs "Microsoft.Office.Interop.Access.FormClass" kann nicht in den Schnittstellentyp "Microsoft.Office.Interop.Access._Form3" umgewandelt werden. Dieser Vorgang konnte nicht durchgefhrt werden, da der QueryInterface-Aufruf an die COM-Komponente fr die Schnittstelle mit der IID "{66B22FB4-F70E-4F03-A00A-F76E9ADBBF10}" aufgrund des folgenden Fehlers nicht durchgefhrt werden konnte: Schnittstelle nicht untersttzt (Ausnahme von HRESULT: 0x80004002 (E_NOINTERFACE))."}
For all who can't read german:
"Microsoft.Office.Interop.Access.FormClass" can't be converted in to "Microsoft.Office.Interop.Access._Form3" ... Interface is not supported.
Code I use:
Dim access As Microsoft.Office.Interop.Access.Application = Nothing
.
.
.
access = New Microsoft.Office.Interop.Access.Application()
[CODE]...
The Error occurs when I try to access any property of "access.Forms("frmTest")"
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Dec 23, 2010
i am working on my A2 coursework and trying to get the log in system working. I wrote a query where i ask the databse if there is a username entered and password. if there is, it will return the username. if there isnt it will stay empty. But how do i do some kind of if statement that if there is the username returned that it will let the person log in ? im really bad at explaining things here is my code.
So basically all i want is how do i make it to see if there is anything returned or not. (im sure the query is working)I am happy to try different ideas but this is furthest i got so far with this one spend like 3 days on this..
[Code]...
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Dec 2, 2009
I have an application where I check the existance of a file. If file exists and I try to delete I get an error. Is there a way to release the lock on the file?
Public Sub CheckReportExists() 'if report exists, do not allow to proceed
If File.Exists("C:Program FilesAstec IndustriesWM2000DailySalesReports" + ReportName + ".pdf") Then
[code].....
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Nov 9, 2009
I'm using System.Net.Sockets namespace for connecting to an ftp server. If a user has to login to a firewall first though, I'm not too sure what to do. The following is what I have working for logging into an ftp server without a firewall. (The Else statement) Do you know what I might add to the if statement? In the method where this conditional is, I am passing a firewall username and password.
m_tcpClient = New TcpClient
' Try to connect to ftp site
' If using firewall, login to it first then issue another command to log in to actual
[code]....
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Dec 2, 2009
I have an application where I check whether a file exists and give user the option to delete the file. When trying to delete the file getting an error. Is there a way to release the lock on the file before delete?
Public Sub CheckReportExists() 'if report exists, do not allow to proceed
If File.Exists("C:Program FilesAstec IndustriesWM2000DailySalesReports" + ReportName + ".pdf") Then
[code].....
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Nov 18, 2010
my advance project for the final semester of software engineering is an intruder detection system which is based on motion detection. I'm using a web camera in order to capture the images sequently and let them to process for further checking to see the difference.
first of all i want to know, is this possible in vb.net (image processing)? if it is possible, please give me some ideas about this to start.i have a brief imagination about the structure but i'm not sure about the success
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Jul 21, 2010
How to run windows application in mac system
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Aug 4, 2009
[2005] System.Configuration.AppSettingsReader
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Aug 30, 2010
My System gets restarts When i Install MS SQL SERVER 2005,
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Jan 10, 2010
I need a clue where to start: how to create an icon that will show up at bottom right of explorer bar.. maybe I don't what its called. I guess windows named that "system tray icon".
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Jan 24, 2011
Weird problem that just started, I am using an OleDbCommnad to create a dataadapter then fill a table everything from a .csv file, works fine except no dates are coming over? I added a datagrid view to my project just to see and any column that should have a date value is empty. I confirmed that the column is of System.DateTime value so I am at a complete loss?
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Jun 30, 2010
I am storing images in a database. When I call the function to get a picture it returns an array of system.byte[]. How do I convert this to an image?I've searched for information, and found this page among others. But the code given doesn't work for me.
'Byte[] to image
imgMemoryStream = New IO.MemoryStream(imgByteArray)
myImage = Drawing.Image.FromStream(imgMemoryStream)
[code].....
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Dec 10, 2009
how to convert system.string to char for label text?? Here it my
[Code].....
I need to get the strings from the site and input the fields strings in the label text, so I needs to convert char of system.string but i don't know how to fix it.
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Sep 2, 2009
I have a laptop with vista and desktop with win xp. I am building the application on win vista but when i copy the same project and view it on win xp , then it only shows the fields that fits on the screen. the rest of the fields that needed to be scrolled on right , does not come at all. The project works fine on win vista. I even tried to tried publishing the project. it works fine on win vista but is missing some fields on win xp.
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May 19, 2009
I use the System.Net.Mail namespace to send email messages in my application and I have a beta customer that reported that some characters were not coming through correctly on his CZECH box. I was not currently giving the option to the user to select an encoding, but I think that I actually should be.
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Jun 2, 2011
I am developing an application using VB.NET ( VS 2005) for Transforming high volume of Data between 2 SQL servers. So I am using DTSObjectLibrary ( COM Objects). The Transforming of Data is fine.
I wanna use EVENT Handlers of the DTS Package. Some code available in msdn helped me. the Event is fired if I use MSGBOX() with in the Overridable Overloads Sub OnProgress . But if Wanna display the result in a Textbox or a Gridview It is not showing.
[Code]...
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May 21, 2009
I have an application that currently stores PDF files (and others) inside the database as BLOBs. The trouble with this method is that I've now got SQL Server databases in excess of 200 GB! I've finally figured out a way to still enable full-text search without needing to store the PDF files as BLOBs (yay! Adobe's iFilter isn't great.), but I'm having trouble designing the method for a client to get access to the files stored on the server's file system.
I want to place the files in a restricted directory on the server, so I can't simply pass a UNC path to the client and let them open the file from there either in a browser or using Process.Start(filename). I understand how that would work, but if that directory has user access granted, all sorts of security holes open up, right?So, what I'm thinking about is a way to have a SQL Server account that has read/write access to/from the protected file system directory. That way (in my mind), the SQL Server can take a file as it's loaded in through the import client (as a series of byte chunks) and write the file to that area of the filesystem. Then, when a file is requested, the SQL Server can bulk load the file into a varbinary(max) field and do whatever I want with it.
1. How can SQL Server take a stream of bytes and write them to a specified location on its local file system? (This is assuming that I want the import utility to be able to be run on a client machine and not require it to be run on the server itself.)
2. Is there any way to stream a varbinary(max) file to a web page out of SQL? I'm using a lot of PDF files that will have Fast Web View enabled, so if I can stream the bytes to a web page, the user will be able to see the first few pages of the document while the rest is loading. I thought about having the SQL Server read (bulk load) the file from the protected area and write it to an unprotected area just long enough to point a web browser to that location, then wiping the file, but that brings me back to #1 above and would THEN require me to be able to issue a delete command from SQL.
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Nov 5, 2010
Question: I want to control cmd.exe from winforms. I DO NOT mean every command in a single process, with startupinfo, and then stop. I mean for example start the (My) SQL or GDB command prompt, send command, receive answer, send next command, receive next answer, stop SQL command prompt exit process. Basically I want to write a GUI on top of any console application.
[Code]...
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Jan 3, 2010
Ok, so I've been doing some looking around lately, trying to figure out how I can get maximum control over a download. So I can control things like:Download speedWhere to start the transaction(Byte Offset, like in a Stream?)Where to end the transaction (Byte Offset, like in a Stream?)
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Mar 9, 2010
if i have two media players in form1 and form2 respectively....how can i control the media player in form2 with media player in form1....so that if i pause media player in form1...the media player in form2 should get passed and if i scrub the seek bar in player1 the seek bar in player in form2 should move along with it...how can i do that.......means how to play single video in both players at once...
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