I am developing an app for a touch screen monitor. I can call the Virtual keyboard no problem using:
System.Diagnostics.Process.Start("osk.exe");
I am looking to close the keyboard by clicking a button in my application.
In my onclick method I have the following code, but it doesn't work:
System.Diagnostics.Process.Start("osk.exe").Kill();
How do I fix it?
Process.Start returns a Process object. Capture that return value and use it to close the keyboard when the user clicks the button.
var osk = System.Diagnostics.Process.Start("osk.exe");
//Do things
//In your button click event
osk.Close();
I had some trouble finding a solution for this as well. Even though this question is older I'll post the solution which worked for me if anyone runs into the same problem.
Saving the reference when starting the process did not work for me. I still don't know why. What worked is looping through all processes using the process name osk.
foreach (System.Diagnostics.Process process in System.Diagnostics.Process.GetProcessesByName("osk"))
{
process.Kill();
}
Try doing it like this instead:
Process osk = System.Diagnostics.Process.Start("osk.exe");
When you are ready to kill it, do this:
osk.Kill();
The issue with your method is your starting osk.exe, then later trying to kill it. But your code to kill it is spinning up a new process and then killing that new spun up process instead of your original process. It's killing it immediately before the OSK is even showing, thus you aren't even seeing the second instance.
Also, know the difference between osk.Kill() and osk.Close(). Close() is the equivalent of hitting the little red X in the upper right hand corner of the window. It allows the application to gracefully shut down on its own. Kill() is the equivalent of opening task manager and forcing the process to end. Close() is probably what you want.
Related
I'm using UI Automation with installation wizards, specifically the FocusChangedEvent to catch when new windows appear on the desktop so I can interact with the buttons and elements. However, I've found that this doesn't catch some windows.
For example, this one gets detected by the event handler when it pops up:
FireFox Setup Wizard
But this one does not: 7-Zip Setup Wizard
I'm not completely sure why this is, though I suspect it has to do with the type of window and perhaps the elements on it that don't get detected. I've also tried checking for a WindowOpenedEvent with no luck. Is there any other alternative that I've missed?
This is the code I have right now:
public void Startup()
{
Automation.AddAutomationFocusChangedEventHandler(OnFocusChanged);
Automation.AddAutomationEventHandler(
WindowPattern.WindowOpenedEvent,
AutomationElement.FromHandle(_process.MainWindowHandle),
TreeScope.Subtree,
new AutomationEventHandler(OnFocusChanged));
}
Edit: I'm exploring non-UI Automation ways to do this now. Looking at the MainWindowHandle of the process I run doesn't always work because it often spawns a child process that is the one actually responsible for the UI, so the only way I can think of doing this right now is to check the MainWindowHandle of every child process.
I have installed a program ("CmisSync.exe") that runs as a small icon in the Windows system tray.
From C# I want to start it, and then exit it gracefully (as if a user had clicked "Exit" in the program's menu). Here is my attempt:
Process process = Process.Start(#"C:\Programs\CmisSync\CmisSync.exe");
// Wait for CmisSync's configuration/UI to start properly.
Thread.Sleep(5000);
// Close as if the user had clicked "Exit".
process.CloseMainWindow();
// Wait for CmisSync to finish what it is doing and exit normally.
// This might take a few minutes if a big sync is going on.
process.WaitForExit();
Unfortunately, CloseMainWindow does not make the program stop.
Maybe it is due to the program not actually have a main window? It only runs in the tray.
Close does not make the program stop either, by design.
Kill is not graceful, it does not let the program finish its current UI loop. Unlike the UNIX equivalent, the command does not seem to accept arguments indicating how brutal the kill should be.
The tray icon is implemented using System.Windows.Forms.Form
Yes, as you have discovered Process.CloseMainWindow only closes a program with a main window i.e you will most likely find the MainWindowHandle will be IntPtr.Zero
Process.CloseMainWindow Method ()
Closes a process that has a user interface by sending a close
message to its main window
Additionally, AFAIK WM_CLOSE or any other message wont help you either
However, you could create a message only window, or have your mainwindow set to invisible so you could message it in standard ways or call Process.CloseMainWindow.
However there are also many other IPC techniques you could use to the same affect, or even WCF. Anyway, since you're in control of the sync tray icon program, you can employ anything really (well except techniques that require a window evidently)
Interprocess Communications
Update
Since its open source, you can either edit as desired or have a look at the internals of it and you might find a way to gracefully close it.
I want to properly close any application (not kill) running in system tray. I have tried SendKeys() but it fails. Sending Alt+F4, Alt+F then x all fail because tray applications have no main window. Any idea how to do that? the objective to to properly exit an application that performs some inner tasks upon exiting, running in system tray without terminating, just like when its titlebar exit button is clicked.
There is no simple answer to this. Each and every application has its own way of controlling life time. You can even write Forms application that does not respond to [Alt F4] to shut it down.
The only way you can an arbitrary process of which you know nothing (other than that it has put an icon into the system tray), is to terminate the process. And that, as Gian Paolo pointed out, is just not cricket.
From what you have written on the comments on the other answers, it sounds like you merely want to close a specific app. You can do this with the taskkill utility.
I am testing out GMap.Net using WPF. So far I have only added the GMapControl, as well as setting some necessary stuff (CacheLocation, MapProvider, Zoom etc). The control is working well, except that when I close my window, it takes a while before VS recognizes that the debugging session has closed.
Apparently, my application's process is still running for some time before it terminates - it's not a bug in VS. This delay only appears when I do zoom/pan just before I close the window. I would want to guess something is still running, but I'm not sure how to tackle this problem.
Has anyone encountered this and have a solution?
What is happening is your program is still caching the tiles.
All you have to do is call gMap.Manager.CancelTileCaching(); when you exit your program or close the form.
gMap is what I named my instance of gMap.Net
Sounds like a there is a thread still running. I have noticed that the classes use the IDisposable interface. When you close the application/window, it is recommended that you call the .Dispose() method to clear any resources in use
Visual Studio Debug does not stop when i close the form that i write in C#. How can i stop debug process when i close form. I added Application.Exit() method in the form closing event but it didn't work.
Thank you.
Try this from here
If (System.Windows.Forms.Application.MessageLoop)
{
// Use this since we are a WinForms app
System.Windows.Forms.Application.Exit()
}
Else
{
// Use this since we are a console app
System.Environment.Exit(1)
}
EDIT:
If there are running infinite threads then do
Thread myThread = new Thread(...);
myThread.IsBackground = true; //set your running thread to background
myThread.Start(...);
And you can see how to? from here
Well this will be four years too late, however, I thought I'd post this for anyone else who runs into this issue (like I just did), sorry in advance if this is pretty basic, I'm fairly new to C# so this threw me for a bit.
I had the same issue as OP where, in my FormClosing event, neither Application.Exit() or Environment.Exit(0) would end the debugger.
The thing I found was looking at the reference count above my FormClosing event, it was showing '0 references'. I had just copied and pasted the closing event from another forum so there was no event handler to actually handle the event I had created/copied.
One easy way to resolve this (besides not copy and pasting code) was to create the event handler:
First go to the 'Form1.cs [Design]' tab
Navigate to the 'Properties' box
Click on 'Events'
Find 'FormClosing' and double click that
If you had the same issue you should now be able to see that there is at least 1 reference to the event. Now when you close the form it should also stop the debugger.
I landed on this question because VS was not stopping when a debugged application was shut down.
One way to see what might be causing the ide to hang is to click on pause and on the 'Debug Location' toolbar view any threads that are still running. For me I noticed that there was still a RabbitMq context that was not disposed of. So this was the clue i needed.
After I made the code change, VS now stops it debugging session once the application exits.
I know this is not a solution that you might be expecting but finding out why applications are not exiting properly or still keeping background processes alive is a very tricky subject. The active threads drop down is the best place to look imho.
Another possibility is, that your process runs in an exception which isn´t handled correctly. I used to show exception messages in self-build dialogs, but forgot to show the created window in one case. So the program ran into the exception, created the window but just didn´t show any sign of it... so the process kept running even when I closed the application.