i have few questions:
A) How do I create an application that works in the background where there is no instance of it visible at the screen.
B) How do Create application that will load right after windows you start windows?
I have created a background worker to go and run a pretty long task that includes creating more threads which will read from a file of urls and crawl each. I tried following it through debugging and found that the background process ends prematurely for no apparent reason.
While Not myreader.EndOfData
Try
currentRow = myreader.ReadFields()
Dim currentField As String
[code]....
This first bit of code is the loop to input from file and this is what the background worker does. The next bit of code is where the background worker creates threads to work all the 'landingPages'. After about 10 threads are created the background worker exits this sub and skips the file input loop and exits the program.
Try
For Each landingPage As String In landingPages
pgbar.Timer1.Stop()
If VisitedPages.Contains(landingPage) Then
[code]....
Also my main thread runs a forms from where this background is called to run but the main thread is supposed to wait for the background process to end unless the user selects another option from the main form.
ive developed my app and am im trying to improve its use ability. Ive created a dvd management app for myself and i have a function that retrieves all the data for all the movies displayed in my listview. It works fine but the interface hangs for the entire time.Ive decided to use a background worker so i can browse other movies with all the data is being fetched.Im having silly problems with getting the index value for my listview when im using the .DoWork()
ive had these errors:
1. Cross-thread operation not valid: Control 'ListView1' accessed from a thread other than the thread it was created on.
2. nvalidArgument=Value of '1' is not valid for 'index'. Parameter name: index
the function works a dream whenvnot being called inside the doWork()
'New Objects
Dim fetch As New Create
Dim download As New Download
Dim parse As New Parse
[code]....
I want to create a program working in background that:I open program and he is invisible (not appear on desktop and in taskbar).How I can do this ?
View 6 RepliesFinal step in my application. I finally got all the requirements working, but now I need to have the application run in the background.
The application was written in Visual Studio 2010 VB, Win form app.
The requirements are as follows:
1.) run the application at start up
2.) no icon
3.) always in focas
4.) always runs in the background.
Here's the full code I have right now (working! whahoooo)
Public Class Form1
Private Property count As Integer
Private s As New Stopwatch
[CODE]...
I'm using loop to read data from sql and then make some calculations then save it again to another table but when application loop for 3 or 4 times it's freeze but the job is done but if loop = 10 or more then it is freeze and hangup for long time .i need to learn how to make my application working better and never freeze and make application working with any count for loop without freeze .
View 7 RepliesI am trying to call a .exe from a VB.net application. I did this using:
System.Diagnostics.Process.Start(" my file name.exe"),
This works but its UI also appears in the screen .Is there a way by which I can start the process and not let the user see it ,i.e to say can we call a .exe in the background?
I am trying to call a .exe from a VB.net application. I did this using ystem.Diagnostics.Process.Start(" my file name.exe"),this works but its UI also appears in the screen .Is there a way by which I can start the process as well do not let the user see it ,i.e to say can we call a .exe in the backdround?
View 5 Repliesi have prepared an application which dose not take any user input and the aim of the application is to take screenshots at a regular interval of 5 min i am using vb.net 2005 for this i have taken a form and in that form i have placed a timer control and in timer trick i am calling the function which takes the screen shot my requirement is to set up this application and this should run in the back ground and the user should not be able to cancel or stop the running of the application how to do this the application should run in the background it self and this should start when ever the system boots?
View 1 RepliesI have an option for the user to choose their own background for the application. How do I then make the image save in the settings for the next time the user starts the application? (This is actual pictures not solid colors).
View 7 RepliesI have developed a very simple application that disables system keyboard commands (ctrl+alt+del, alt+tab, etc), hides the taskbar, hides the desktop, etc.Upon entering a password the user can 'unlock' these options.This is being used with a restaurant POS system so no accidents can happen. However there seems to be one minor issue:In a separate software package (the POS software), at specific times, any application that is running (my locking application) will get focus and end up on top of the POS software.I want my locking software to remain underneath all running applications. Anyway to keep my locking application from gaining focus? I was thinking of maybe adding some line of code to send my locking application into the background whenever it gets focus..
View 4 RepliesIs it possible to run my application in the background so there is no minimised window on the bottom bar and, if possible, so an icon appears in the taskbar? If so, how would I do it?
View 2 RepliesI'd like to create an application that will run on the background. Any sites that I can refer to or idea?
View 3 RepliesHow to send keystrokes to an application that does not have focus and is not selected. i have read about sendmessage, but am not sure how to use it or anything, not even sure if its what i need.
i dont need to send anything but normal character keystrokes
im using VS 2008
how to send keystrokes to an application that does not have focus and is not selected. i have read about sendmessage, but am not sure how to use it or anything, not even sure if its what i need.i dont need to send anything but normal character keystrokes?im using VS 2008?
View 23 RepliesIs it possible to start an application not being visible? This application is a batch application and my application would look way better if I could hide this batch.
View 2 RepliesI'm feeling frustrated. I have spent hours looking for a good piece of code to capture the keypress events in any windows no matter if my application is focused or not. I need to create an application to work in the background to capture the F5 key. Does anyone have any code?
View 4 Replieshow to re-write my application (http:[url]....) to be multi-threaded using the background worker. The use case is something like:
1. User opens a binary file, it can be several Gbytes in size so reading it into memory isn't practical.
2. User can then navigate through the file in 188byte chunks, data is read from disk, decoded, and displayed for each chunk in turn.
3. User may want to search for some data or build a report. This will involve repeating the read, decode, display, function multiple times. During this looping the GUI stops responding and there is no option to cancel so I want to make it multi-threaded. So, is it safe to open the file in the GUI thread and then read from the file in the background thread? I currently use something like this to open the file once:
Dim fi As New FileInfo(filepath)
fs = fi.OpenRead()
and then in a separate sub multiple calls to:[code]..........
I want to access a 3rd Party application in the background with the SendMessage method. It just needs to send a "space" to the software to trigger an action. It is important that this is done in the background because its a periodic event (ca. every 10 seconds), and it should be possible to simultaneously work on the same machine.
I tried to use the same approach which is shown in [URL]
The code I used is as follows:
Const WM_CHAR = &H102
Const BM_CLICK As Long = &HF5&
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd
[Code].....
Is it possible to change the background color of Message box in windows application.
View 7 RepliesI would like my application to respond to when the user press the media keys on his keyboard. Anyone know how to make my application capture this when it's in the background.
View 15 RepliesI'm trying to use the Shell to have my application call an external application but its not working...I don't understand why. I get the following error: 'System.windows.shell' is a namespace and cannot be used as an expression!
Heres my code....any ideas what I'm doing wrong. Its got to be a simple...stupid error.
Private Sub mnuUpgrade_Click(ByVal Ctrl As Microsoft.Expression.Web.Interop.Legacy.CommandBarButton, ByRef CancelDefault As Boolean) Handles mnuUpgrade.Click
[CODE].....................
It detects the color fine and the picture background changes to the color my mouse is pointing at, but when it changes to one of the colors its ment to send me a msg it doesn't..[code]
View 2 RepliesIt detects the color fine and the picture background changes to the color my mouse is pointing at, but when it changes to one of the colors its ment to send me a msg it doesn't
Public Class Form1
Dim color As Integer
Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles
[code].....
I am trying to paint the Computer Screen grey for the duration that the splash screen and the next popup screen (both of the dimensions lesser than the Computer Monitor's)run, the background is always grey. [code]...
View 2 RepliesI am trying to develop a application that will invert my mouse but that will run in the background of my computer.
View 2 RepliesI'm writing a command-line application in .Net. The app itself is fairly simple, but it has to connect synchronously to a web-service, which in turn has to connect to a Oracle database, and those pieces are fond of taking their time.
Is there a straightforward way (without dividing my app exe in two) to continue executing but nonetheless yield execution to the command prompt?
It's Windows, so no "&". Also, I cannot use cmd.exe's "start" cmdlet.
I'm using a background worker to in an Excel VSTO application to throw up a progress dialog box with a status bar and a cancel button to escape from long running calculations. It's working really well, except for one issue. I'd like to use a Modal Dialog, so that the UI behind the dialog gets locked up, instead of a Modeless Dialog. If I use .ShowDialog() instead of .Show(), everything is great until you hit the Cancel button on the form. Following things in the debugger, the cancellation happens, it just takes somewhere in range of 30 seconds. If I use .Show() on my form, then the cancellation occurs immediately as it should.
[Code]...
So I have a form with a textbox1 thats supposed to enter in a set of keywords and then ebay will give you the"Instant suggestions" in return, but when I have my textbox1.text send the text over to the ebay form, ebay will not return any suggestions, unless I use the sendkeys.send method. Well, I do not like the sendkeys.send method because it's way too buggy &only works under the right conditions.Here's a pic of google instant and ebay does the same thing. So here's what I'm trying to get ebay to do:Here's the code that I have:
Dim theElementCollection As HtmlElementCollection = WebBrowser1.Document.GetElementsByTagName("input")
For Each curElement As HtmlElement In theElementCollection
[code].....
Has this ever happened to anyone? It has happened to me and one of my customers in the past but I have no idea how he diagnosed it and it is happening with another one of my clients now. The application runs, but the HTTP requests do not. The application works 100% perfect on my own computer but not the customers. He has both the 1.1 and the 3.5 framework installed, and uses Vista (same as me). Can anyone shed some light on this situation because this is a huge huge huge problem that I would rather not have to worry about in the future with other clients.
View 6 Replies
