Hi my app currently has a process thats ongoing (even when I navigate back to the main screen of my app). Is there any code I can use to terminate all the processes on that page before it navigates back to the main screen. In other words the page should reset to its original form
are you asking if you can stop a certain thread(not a process) ?if so please read the following post Stopping Threads
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TL;DR Can I make a VB.net form visible on the Windows lock screen [i.e. when a user hits WIN+L]?
I wrote an alert system that notifies staff of a 'lockdown' in vb.net. This has been tested in drills a few times but today it was noted that the 'alert window' does not appear when the screen is locked.
The alert window does make an alarm sound, which can still be heard even when the computer is locked but this is dependant on the machine having speakers that are turned on...
The workstations are running Windows 7.
Edit
I am not looking to spawn a separate process, just get the 'lockdown.vb' form showing on top of the windows lock screen.
Googling this has just given me a load of tutorials on making a lockscreen...which is not what I'm after, hence the question. :-)
I am developing a Windows Phone 8.1 app. In that I need to to navigate from
Page1 --> Page2--> Page3
But I don't want Page1 to apper again when I keep on pressing back button.
Page3-->Page2-->Exit the app
I was able to achieve this using Frame.BackStack.Clear() in the OnNavigatedFrom() of Page1. But the problem is when I click the app icon again its only launching from Page2 not from Page1.
So I want to understand, why the back stack is not cleared when we press
back button and exit the app. And how to achieve the behavior I require
Windows Phone 8.1 Store apps do not close when you are navigating back from the first page. Instead they only get suspended. So once you start open it again, you end up on the last running instance of the app again, this includes backstack, page state, etc.
In the app.xaml.Cs's OnLaunched handler, you can intercept this behavior: You can check the e.PreviousExecutionState where you can check, if you want to handle it as a real restart.
In that case you just dump the current Frame and replace it with a new one, or clear the backstack and start with a new navigation.
Also: The Backstack is a list. You can remove single entries any time and not only completely clear it with the RemoveAt method.
Your methods sounds okay to me. It is that the app runs behind the scene. Unless you write a code like this it will keep running in the last position you kept.
Application.Current.Exit();
I want to be able to send a stream of data from a user computer to a web-service. That should not be too hard - I would use an application written in dot-net that resides on a user's Windows computer.
However, the tricky part is that the stream-of-data should only be sent (by the app) when the user clicks on a button or a link in a WEB PAGE that is open in his browser. The app itself would be minimized in the system tray. And he should be able to stop the stream by clicking on a stop-button (or link) in that web page..
So I found some info on stackoverflow that says that you can put a link in your page, something like: [a href='alert:"Hello World" ' ] and if you register your application (in this example the app would be called "alert.exe") in the registry, then when the user clicks on the link, he will cause the application to start, and to receive "Hello World" as a parameter.
Anyway, there are complications in my case. I want to be able to tell the application when to start sending data, and when to stop sending data, without starting new instances of the application. If the user clicks START, and the app is already open, I don't want it to open again. I do want a message to go saying "start sending" and if the user clicks on a STOP button (or link) to say "stop sending". The user might click on these web-page buttons several times in a session, and I don't want to close and reopen the program each time.
So a couple of questions:
Am I taking the right approach? Would "plug-ins" be a better idea?
If I am taking the correct approach, is there some way to send commands from a web page to an application?
Is it safe to have my app modify the registry of user computers?
If so, is there a set of commands for doing that?
Is the registry supported by Windows 7, Windows 8, etc? I know it is not supported on a Mac.
Thanks in advance.
LL
P.S. (the info on launching apps from your browser was at: http://msdn.microsoft.com/en-us/library/ie/aa767914%28v=vs.85%29.aspx).
I'm building an application using vb.net that should record some specific user actions, one of these actions is the screen shutdown, is there a way to do that? Maybe a system event or something that i can check periodically to know if the screen is active or not.
I've already found some code to check if the screensaver is running but i want to know if there's a way to detect if the screen is phisically turned off.
Can a WinRT app continue to run while Screen Off?
I know that a WinRT application can create a Background Task that periodically executes even when the application is not running. Handy, but not what I am asking. What I am asking is, when the user clicks the power button and invokes Connected Standby, is there anything an app can do to remain active. Can it ask for some special capability?
Example - in Windows Phone there is a handy Running and Walking app that keeps track of "where you are" while it is running - then tallies your distances, etc. Even when the screen is off! Turn the screen on and the "where was I" map is up-to-date. Is this type of application possible in WinRT?
I've been looking into the same thing recently, and unfortunately it seems that what you want to do isn't possible with WinRT.
Why don't you use Background task to simulate what you are trying to achieve. When the user starts the app again, you could have the info populated to the latest data by looking at the store where the background process updated. Just a thought.