Timer By Ten

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Definition

Generates an event after a set interval, with an option to generate recurring events.

After my first WCA speedcubing competition in 2007, I made this Rubik's timer for speedcubing to improve my solution times. Now my hobby has become my obsession, complete with all the normal cubes (2x2, 3x3, 4x4, 5x5) as well as the Rubik's Snake, Rubik's Magic, Pyraminx, Megaminx, and even the new 6x6x6 and 7x7x7 cubes from V-Cube (previously Olympicube)!! Timer.net offers a simple and free digital timer to use online. Set the second, the minute, and the second for the online countdown timer and you start it. Timer online with alarm. You can use the countdown like a kitchen timer online. Stopwatch, clock. Mobile friendly. This timer counts down silently until it reaches 0:00, then a police siren sounds to alert you that time is up.

Inheritance

Timer

Implements

By the time expresses that the end-point of one activity (with duration) is the point-of-time for viewing the timing of another activity, “not later than the time” possibly before and up to X point of time. The expression is used to compare or estimate relative progress of one activity to another. By the time expresses that the end-point of one activity (with duration) is the point-of-time for viewing the timing of another activity, “not later than the time” possibly before and up to X point of time. The expression is used to compare or estimate relative progress of one activity to another.

Examples

The following example instantiates a System.Timers.Timer object that fires its Timer.Elapsed event every two seconds (2,000 milliseconds), sets up an event handler for the event, and starts the timer. The event handler displays the value of the ElapsedEventArgs.SignalTime property each time it is raised.

Remarks

The Timer component is a server-based timer that raises an Elapsed event in your application after the number of milliseconds in the Interval property has elapsed. You can configure the Timer object to raise the event just once or repeatedly using the AutoReset property. Typically, a Timer object is declared at the class level so that it stays in scope as long as it is needed. You can then handle its Elapsed event to provide regular processing. For example, suppose you have a critical server that must be kept running 24 hours a day, 7 days a week. You could create a service that uses a Timer object to periodically check the server and ensure that the system is up and running. If the system is not responding, the service could attempt to restart the server or notify an administrator.

Important

The Timer class is not available for all .NET implementations and versions, such as .NET Standard 1.6 and lower versions.In these cases, you can use the System.Threading.Timer class instead.

This type implements the IDisposable interface. When you have finished using the type, you should dispose of it either directly or indirectly. To dispose of the type directly, call its Dispose method in a try/catch block. To dispose of it indirectly, use a language construct such as using (in C#) or Using (in Visual Basic). For more information, see the 'Using an Object that Implements IDisposable' section in the IDisposable interface topic.

The server-based System.Timers.Timer class is designed for use with worker threads in a multithreaded environment. Server timers can move among threads to handle the raised Elapsed event, resulting in more accuracy than Windows timers in raising the event on time.

The System.Timers.Timer component raises the Elapsed event, based on the value (in milliseconds) of the Interval property. You can handle this event to perform the processing you need. For example, suppose that you have an online sales application that continuously posts sales orders to a database. The service that compiles the instructions for shipping operates on a batch of orders rather than processing each order individually. You could use a Timer to start the batch processing every 30 minutes.

Important

The System.Timers.Timer class has the same resolution as the system clock. This means that the Elapsed event will fire at an interval defined by the resolution of the system clock if the Interval property is less than the resolution of the system clock. For more information, see the Interval property.

When AutoReset is set to false, a System.Timers.Timer object raises the Elapsed event only once, after the first Interval has elapsed. To keep raising the Elapsed event regularly at the interval defined by the Interval, set AutoReset to true, which is the default value.

The Timer component catches and suppresses all exceptions thrown by event handlers for the Elapsed event. This behavior is subject to change in future releases of the .NET Framework. Note, however, that this is not true of event handlers that execute asynchronously and include the await operator (in C#) or the Await operator (in Visual Basic). Exceptions thrown in these event handlers are propagated back to the calling thread, as the following example illustrates. For more information on exceptions thrown in asynchronous methods, see Exception Handling.

If the SynchronizingObject property is null, the Elapsed event is raised on a ThreadPool thread. If processing of the Elapsed event lasts longer than Interval, the event might be raised again on another ThreadPool thread. In this situation, the event handler should be reentrant.

Note

The event-handling method might run on one thread at the same time that another thread calls the Stop method or sets the Enabled property to false. This might result in the Elapsed event being raised after the timer is stopped. The example code for the Stop method shows one way to avoid this race condition.

Even if SynchronizingObject is not null, Elapsed events can occur after the Dispose or Stop method has been called or after the Enabled property has been set to false, because the signal to raise the Elapsed event is always queued for execution on a thread pool thread. One way to resolve this race condition is to set a flag that tells the event handler for the Elapsed event to ignore subsequent events.

If you use the System.Timers.Timer class with a user interface element, such as a form or control, without placing the timer on that user interface element, assign the form or control that contains the Timer to the SynchronizingObject property, so that the event is marshaled to the user interface thread.

For a list of default property values for an instance of Timer, see the Timer constructor.

Tip

Be aware that .NET includes four classes named Timer, each of which offers different functionality:

System.Timers.Timer (this topic): fires an event at regular intervals. The class is intended for use as a server-based or service component in a multithreaded environment; it has no user interface and is not visible at runtime.
System.Threading.Timer: executes a single callback method on a thread pool thread at regular intervals. The callback method is defined when the timer is instantiated and cannot be changed. Like the System.Timers.Timer class, this class is intended for use as a server-based or service component in a multithreaded environment; it has no user interface and is not visible at runtime.
System.Windows.Forms.Timer (.NET Framework only): a Windows Forms component that fires an event at regular intervals. The component has no user interface and is designed for use in a single-threaded environment.
System.Web.UI.Timer (.NET Framework only): an ASP.NET component that performs asynchronous or synchronous web page postbacks at a regular interval.

Constructors

Timer()	Initializes a new instance of the Timer class, and sets all the properties to their initial values.
Timer(Double)	Initializes a new instance of the Timer class, and sets the Interval property to the specified number of milliseconds.

Properties

AutoReset	Gets or sets a Boolean indicating whether the Timer should raise the Elapsed event only once (`false`) or repeatedly (`true`).
CanRaiseEvents	Gets a value indicating whether the component can raise an event. (Inherited from Component)
Container	Gets the IContainer that contains the Component. (Inherited from Component)
DesignMode	Gets a value that indicates whether the Component is currently in design mode. (Inherited from Component)
Enabled	Gets or sets a value indicating whether the Timer should raise the Elapsed event.
Events	Gets the list of event handlers that are attached to this Component. (Inherited from Component)
Interval	Gets or sets the interval, expressed in milliseconds, at which to raise the Elapsed event.
Site	Gets or sets the site that binds the Timer to its container in design mode.
SynchronizingObject	Gets or sets the object used to marshal event-handler calls that are issued when an interval has elapsed.

Methods

BeginInit()	Begins the run-time initialization of a Timer that is used on a form or by another component.
Close()	Releases the resources used by the Timer.
CreateObjRef(Type)	Creates an object that contains all the relevant information required to generate a proxy used to communicate with a remote object. (Inherited from MarshalByRefObject)
Dispose()	Releases all resources used by the Component. (Inherited from Component)
Dispose(Boolean)	Releases all resources used by the current Timer.
EndInit()	Ends the run-time initialization of a Timer that is used on a form or by another component.
Equals(Object)	Determines whether the specified object is equal to the current object. (Inherited from Object)
GetHashCode()	Serves as the default hash function. (Inherited from Object)
GetLifetimeService()	Retrieves the current lifetime service object that controls the lifetime policy for this instance. (Inherited from MarshalByRefObject)
GetService(Type)	Returns an object that represents a service provided by the Component or by its Container. (Inherited from Component)
GetType()	Gets the Type of the current instance. (Inherited from Object)
InitializeLifetimeService()	Obsolete. Obtains a lifetime service object to control the lifetime policy for this instance. (Inherited from MarshalByRefObject)
MemberwiseClone()	Creates a shallow copy of the current Object. (Inherited from Object)
MemberwiseClone(Boolean)	Creates a shallow copy of the current MarshalByRefObject object. (Inherited from MarshalByRefObject)
Start()	Starts raising the Elapsed event by setting Enabled to `true`.
Stop()	Stops raising the Elapsed event by setting Enabled to `false`.
ToString()	Returns a String containing the name of the Component, if any. This method should not be overridden. (Inherited from Component)

Events

Disposed	Occurs when the component is disposed by a call to the Dispose() method. (Inherited from Component)
Elapsed	Occurs when the interval elapses.

Timer Ten Seconds

Applies to

Thread Safety

Any public static members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Time For Ten Minutes

1 one	2 two	3 three	4 four	5 five	6 six	7 seven	8 eight	9 nine	10 ten
11 eleven	12 twelve	13 thirteen	14 fourteen	15 fifteen	16 sixteen	17 seventeen	18 eighteen	19 nineteen	20 twenty
21 twenty- one	22 twenty- two	23 twenty- three	24 twenty- four	25 twenty- five	26 twenty- six	27 twenty- seven	28 twenty- eight	29 twenty- nine	30 thirty
31 thirty- one	32 thirty- two	33 thirty- three	34 thirty- four	35 thirty- five	36 thirty- six	37 thirty- seven	38 thirty- eight	39 thirty- nine	40 forty
41 forty- one	42 forty- two	43 forty- three	44 forty- four	45 forty- five	46 forty- six	47 forty- seven	48 forty- eight	49 forty- nine	50 fifty
51 fifty- one	52 fifty- two	53 fifty- three	54 fifty- four	55 fifty- five	56 fifty- six	57 fifty- seven	58 fifty- eight	59 fifty- nine	60 sixty
61 sixty- one	62 sixty- two	63 sixty- three	64 sixty- four	65 sixty- five	66 sixty- six	67 sixty- seven	68 sixty- eight	69 sixty- nine	70 seventy
71 seventy- one	72 seventy- two	73 seventy- three	74 seventy- four	75 seventy- five	76 seventy- six	77 seventy- seven	78 seventy- eight	79 seventy- nine	80 eighty
81 eighty- one	82 eighty- two	83 eighty- three	84 eighty- four	85 eighty- five	86 eighty- six	87 eighty- seven	88 eighty- eight	89 eighty- nine	90 ninety
91 ninety- one	92 ninety- two	93 ninety- three	94 ninety- four	95 ninety- five	96 ninety- six	97 ninety- seven	98 ninety- eight	99 ninety- nine	100 one hundred

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