timer

问题 I have created a windows service with timer in c#.net. it works fine while i debug/build the project in visual studio but it does not perform its operation after installation. What might be the reason behind this ? code : public partial class Service1 : ServiceBase { FileStream fs; StreamWriter m_streamWriter; Timer tm = new Timer(); public Service1() { InitializeComponent(); this.ServiceName = "timerservice"; tm.Interval = 2000; tm.Tick += new EventHandler(PerformOperations); tm.Start(); fs

问题 This question already has answers here : How do I time a method's execution in Java? (38 answers) Closed last year . What's a simple/easy way to access the system clock using Java, so that I can calculate the elapsed time of an event? 回答1: I would avoid using System.currentTimeMillis() for measuring elapsed time. currentTimeMillis() returns the 'wall-clock' time, which may change (eg: daylight savings, admin user changing the clock) and skew your interval measurements. System.nanoTime(), on

问题 This question already has answers here : How do I time a method's execution in Java? (38 answers) Closed last year . What's a simple/easy way to access the system clock using Java, so that I can calculate the elapsed time of an event? 回答1: I would avoid using System.currentTimeMillis() for measuring elapsed time. currentTimeMillis() returns the 'wall-clock' time, which may change (eg: daylight savings, admin user changing the clock) and skew your interval measurements. System.nanoTime(), on

问题 I would like to measure time in C, and I am having a tough time figuring it out, all I want is something like this: start a timer run a method stop the timer report the time taken (at least to micro accuracy) Any help would be appreciated. (I am compiling in windows using mingw) 回答1: High resolution timers that provide a resolution of 1 microsecond are system-specific, so you will have to use different methods to achieve this on different OS platforms. You may be interested in checking out

问题 How can I call an Ajax Request in a specific time Period? Should I use Timer Plugin or does jQuery have a plugin for this? 回答1: You can use the built-in javascript setInterval. var ajax_call = function() { //your jQuery ajax code }; var interval = 1000 * 60 * X; // where X is your every X minutes setInterval(ajax_call, interval); or if you are the more terse type ... setInterval(function() { //your jQuery ajax code }, 1000 * 60 * X); // where X is your every X minutes 回答2: A bit late but I

问题 I want to use the highest possible resolution timer using c#. For example, I want to raise an event every 11 ticks (I've heard that tick is the highest possible counter in pc). I tried timer and found that minimum elapsed time is in milliseconds. I looked at stopwatch but stopwatch doesn't raise events. Thanks. 回答1: Using a multimedia timer should give you about 1000 events per second. This code should help you on the way. public delegate void TimerEventHandler(UInt32 id, UInt32 msg, ref

问题 I have a simple quiz application and I want display a nice timer / clock at the top of the page which shows the user how long they've been going for. (If I could somehow show them a timer for Total Quiz Time and also a second one for This Question Time that would be even cooler but I should be able to figure out how to do myself that once I've got one timer working. My question is: What's a nice, easy way to show a simple timer / clock using JQuery? (straight JS is also ok) I know how to

问题 Does a System.Timers.Timer elapse on a separate thread than the thread that created it? Lets say I have a class with a timer that fires every 5 seconds. When the timer fires, in the elapsed method, some object is modified. Lets say it takes a long time to modify this object, like 10 seconds. Is it possible that I will run into thread collisions in this scenario? 回答1: For System.Timers.Timer: See Brian Gideon's answer below For System.Threading.Timer: MSDN Documentation on Timers states: The

问题 Where can I find a control which is like the C# Timer Control in WPF? 回答1: The usual WPF timer is the DispatcherTimer , which is not a control but used in code. It basically works the same way like the WinForms timer: System.Windows.Threading.DispatcherTimer dispatcherTimer = new System.Windows.Threading.DispatcherTimer(); dispatcherTimer.Tick += dispatcherTimer_Tick; dispatcherTimer.Interval = new TimeSpan(0,0,1); dispatcherTimer.Start(); private void dispatcherTimer_Tick(object sender,

问题 Lately I've been using loops with large numbers to print out Hello World : int counter = 0; while(true) { //loop for ~5 seconds for(int i = 0; i < 2147483647 ; i++) { //another loop because it's 2012 and PCs have gotten considerably faster :) for(int j = 0; j < 2147483647 ; j++){ ... } } System.out.println(counter + ". Hello World!"); counter++; } I understand that this is a very silly way to do it, but I've never used any timer libraries in Java yet. How would one modify the above to print