timer

问题 Hello I would like to create a countdown timer within a subroutine which is then displayed on the canvas. I'm not entirely sure of where to begin I've done some research on to it and was able to make one with the time.sleep(x) function but that method freezes the entire program which isn't what I'm after. I also looked up the other questions on here about a timer and tried to incorporate them into my program but I wasn't able to have any success yet. TLDR; I want to create a countdown timer

问题 namespace PizzaSoftware.UI { /// <summary> /// Interaction logic for LoginForm.xaml /// </summary> public partial class LoginForm : Window { public LoginForm() { InitializeComponent(); } private void Window_Loaded(object sender, RoutedEventArgs e) { Timer timer = new Timer(1000); timer.Elapsed += new ElapsedEventHandler(timer_Elapsed); timer.Enabled = true; } void timer_Elapsed(object sender, ElapsedEventArgs e) { lblCurrentTime.Content = DateTime.Now.ToShortTimeString(); } } } Basically, I'm

问题 I am currently using a thread to run a function every second in a console application C# is a thread the best way to do it? As I have asked a lot of my friends and they have suggested using a timer not a thread for running something every second? If it is a better option to use a timer how would I go about running a function every second using a timer? I have looked around but I am really unsure if that applies to be and if its the right way of going about it in my own way. So can someone

问题 Since performance of string concatenation is quite weak in VB6 I'm testing several StringBuilder implementations. To see how long they're running, I currently use the built-in Timer function which only gives me the number of seconds that have passed after midnight. Is there a way (I guess by importing a system function) to get something with milliseconds precision? 回答1: Yes, you can use the Win32 API: DWORD WINAPI GetTickCount(void); To import it in VB6 declare it like this: Private Declare

问题 I am trying to update the list view with timer.I have implemented the android UI timer tutorial but my problem is how to use it for List view where i need to update the each row of list after a certain interval. how does the handler will update the each row of the list(i.e suppose a textview is inside the eachrow where i'll display the updated values.) public class ListAdapter extends BaseAdapter { private List<String> messages; private Context mContext; public ListAdapter(Context context ,

问题 I am trying to update the list view with timer.I have implemented the android UI timer tutorial but my problem is how to use it for List view where i need to update the each row of list after a certain interval. how does the handler will update the each row of the list(i.e suppose a textview is inside the eachrow where i'll display the updated values.) public class ListAdapter extends BaseAdapter { private List<String> messages; private Context mContext; public ListAdapter(Context context ,

问题 My understanding is that the full microtask task queue is processed after each macrotask. If that is the case, why does the setTimeout callback get executed after the Promise microtasks in the following snippet of JavaScript ? console.log('start'); setTimeout(() => { console.log("setTimeout"); }); Promise.resolve().then(function() { console.log('promise'); }); console.log('end'); This outputs the following: > "start" > "end" > "promise" > "setTimeout" Is it because of a ~ 4ms delay imposed by

问题 Does anybody know how to show a text for a particular time in a label or in a textbox? Suppose if I clicked a button it show the text typed in the textbox in a label for 15 seconds and then it should disappear. 回答1: Make use of Timer , available in System.Timers Run-time Timer class represents a Timer control and used to create a Timer at run-time. The following code snippet creates a Timer at run-time, sets its property and event handler. Timer t = new Timer(); t.Interval = 2000; timer1

问题 Scenario: I am building a scheduling system and each timer event I wanted to run a custom method instead of the usual Timer.Elapsed event. So I wrote something like this. foreach (ScheduleElement schedule in schedules) { TimeSpan timeToRun = CalculateTime(schedule); schedule.Timer = new Timer(timeToRun.TotalMilliseconds); schedule.Timer.Elapsed += delegate { Refresh_Timer(schedule); }; schedule.Timer.AutoReset = true; schedule.Timer.Enabled = true; } Ok so simple enough that actually did

问题 What I want to do is basically remove a function from an event, without knowing the function's name. I have a FileSystemWatcher . If a file is created/renamed it checks its name. If it matches, it then moves it to a specific location. However, if the file is locked, it makes a lambda that attaches to a timer's tick event, waiting until the file is not locked. When it isn't, it moves the file and then removes itself from the event handler. I've seen lots of ways to do this, like keeping the