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I have a problem with a project. After I close my program it won't start anymore because it is still half running in the background.
Sideinfos:
I use threads to asynchronously send refreshing values to other clients via multicast.
How can I stop the threads, so they won't run in the background and I can restart the program?
When you start a thread, you can just set the IsBackground property to true so that it does not survive the death of the other threads.
var thread = new Thread(SendAndReceive);
thread.IsBackground = true;
thread.Start();
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I have a button that executes a command, and it contains a while loop, the application freezes after I start the command, I have also tried to run it recursively but I got the same behavior, and using a timer is not an option, the task can't be called using an interval
You have to run the blocking section of your code in a separate thread. Running it on the main UI thread will freeze the UI.
You can use Tasks to do this.
using System.Threading.Tasks;
Task.Run(() => {
while (condition)
{
// operation
}
});
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I am developing a C# apps with callback functions.
When the app gets a message, a callback function is triggered and opens a form to display the contents of the message. I do that with .Show() and .BringToFront().
But the new form window, that is opened is frozen. I can't click buttons or even close the window. It remains in the background.
Can somebody tell me why this is happening?
I am using visual studio 2019.
The callback function:
public void currentSelectedCharacteristic_ValueChanged3(GattCharacteristic sender, GattValueChangedEventArgs args)
{
Allgemein.HinweisFenster.Show();
Allgemein.HinweisFenster.BringToFront();
}
We need more details to solve. But i can say that there is a process that blocks your main thread. Try to use 'Application.DoEvent();' or move your code that blocks your thread to another thread. And consider using 'background worker' for this.
Please refer to this thread for more details.
You should also consider that for Windows application, you have to be aware of threads manipulation, thus you have always one GUI thread that can be impacted by your calls flow.
So a rule of thumb is to know how your threads work inside your application.
Generally speaking, Frozen windows are often a sign of GUI thread block.
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On clicking directly my c# application.exe file, i am running my application and its process in task manager appears if that process on certain condition kills my application stops. What i want is to re run the application after delay of 5 seconds by it self.
You cannot. That process is gone. What you can do is start a second process with you first, most commonly called a "watchdog" or "guard", to scan for your first process and if it does not find it, start it. It's not foolproof though, somebody could just as easily kill that process, too. It's just another layer.
Advice on how to implement that is far to broad for this format, I suggest you read some good articles on it, try to implement it and come here when you find yourself stuck at a specific problem.
Although my answer might not be that helpful, and also this question isn't a kind related to coding issues, but I suppose, using Windows Task Scheduler might work out for you, as you can add various triggers to your application and repeat your task after any set amount of time.
Hope it helps. Thanks
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All of UWP Samples I have tried to compile and run do not work. They always freeze on splash screen and stay like that. And after shutting them down, I can't run them again because it says System is using the .exe process.
Have you tried to turn off your Anti-Virus?
In my case, Avast sometimes blocks my executable, so I have to disable it.
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Maybe it’s a novice question, but I a am a novice. I have a program which does a lengthy task, while it does it, the form stays frozen, if its minimized it can't be maximized Etc. How can I fix that.
Also, the program runs in a loop, and in each iteration prints info to a list box, line by line. Problem is, the list box doesn't get written, untill after the whole loop finishes. How can I correct that.
You can use either a Thread or a BackgroundWorker to do your work.
Calling lengthy code from the UI will block the UI thread and the app 'freezes'.