I'm having problems getting an application I wrote for Windows Mobile 6.0 to run more than one time on my smart phone.
I built it into a .cab and it installs and runs fine the first time, but if I close the application and try to start it again, it will not run unless I restart the phone.
I have checked the task manager after closing the application and it does not show up.
Are you sure that you are closing your application properly? I recommend using a process manager to see if your application still runs on the background.
My problem was in not handling closing the main Form when the application exited from one of the other forms. Ex: application starts with calculator loaded, user loads unit conversion form from calculator form, and the app hides the calculator. User then closes the unit form and calculator is still running.
All that I missed was handling an OnClosed event in my main form for when the user tried closing the application from one of the other forms.
Related
I'm developing a MVC application using .NET 6.0. I am publishing the app with the following configuration:
The app, so far, is launched by double-clicking the .exe, it shows the classic "cmd-style" window.
Now the requirement is to start the portable app minimized into a system tray notification area in Windows (if this is not possible, I was looking for a method to deploy the app as a service which runs in background).
How can I achieve this? Thank you.
To obtain access to the system tray, you need a message pump and a target window. In other words, a regular command-line executable doesn't cut it. Basically you need to have an executable that creates a window (can be an invisible one) and then the main thread must pump Windows messages.
I'll say this much for now becuase the provided information is insufficient and explaining all possible scenarios would be too long a response.
I'm creating an application that should always be running in the system tray.
This is working like a charm.
now when I open the application for a second time, i have used the Mutex method and now also the Process.getprocessesbyname method.
im able to find if there is already an instance running. im killing that process and start a new one. this is oke, but when I check the systemtray the old icons stay...
is there a way to find the running application and if it is running just show the form from that application instead of the new form.
when you now close the application with the X its not in the taskbar anymore only in the systemtray.
thx !
I'm running a simple .NET Windows Forms application. When I click the close button, the Windows form gets closed, but the process is not closing. When I look at the Task Manager, I see that the process for the application is still live, as a background process.
Can somebody explain why that is? Am I missing some function when it's closing?
You need to call
Application.Exit();
in your Form's closing event.
Application.Exit
Informs all message pumps that they must terminate, and then closes all application windows after the messages have been processed. This is the code to use if you are have called Application.Run (WinForms applications), this method stops all running message loops on all threads and closes all windows of the application.
// WinForms app
System.Windows.Forms.Application.Exit();
Put this code on you from's closing event.
The main reason for not close properly, When your application works with the multi threading. You should use the following, it's works for me as well.
Application.ExitThread();
I have this problem:
I built an application in c# .net 2.0 that is on the tray bar and everything works fine: if I click the close menu (that i've added) I call Close(); of the main form and everything is ok.
my problem is: if a person shutdown the pc without closing my application, windows seems to be not able to close this program and the shutdown routine is breaked.
a note: in my app I use a BackgroundWorker.
thanks in advance
If your application is doing something that is stopping windows from shutting down properly, you should handle the SystemEvents.SessionEnding event in your application. This event is fired when the system is shutting down or the user is logging off.
In your event handler, do whatever is necessary to allow your application to be terminated gracefully, such as stopping all background workers / threads - etc.
I have a C# windows application. I placed it on a test server, whose set up is not controlled by my company and neither is the seurity context. I double click the exe. App runs and i see my form. I close the application, i open task manager and i still see a foot print of the applicatiion.
taskkill does not seem to remove it and it is still running in task manager.
how do i check if any resource is still being held?
The likely cause is that a background thread is still running after your application is closed. Depending on your framework and application configuration a background thread can cause a process to keep running even after the main window is closed.
Do you have any threads in your process? If so make sure to close them out when the main application window is closing. A good place to do this is in the OnClosing method of a Windows Form
Abusing Application.DoEvents() is another way to get into this kind of trouble. If you cannot kill the .exe from TaskMgr, your app is stuck waiting for a driver to finish an I/O request.