ElapsedEventArgs.SignalTime Özellik

Tanım

Ad Alanı:

System.Timers

Bütünleştirilmiş Kod:

System.ComponentModel.TypeConverter.dll

Kaynak:

ElapsedEventArgs.cs

Olayın oluşturulduğu tarihi/saati Elapsed alır.

public:
 property DateTime SignalTime { DateTime get(); };

public DateTime SignalTime { get; }

member this.SignalTime : DateTime

Public ReadOnly Property SignalTime As DateTime

Özellik Değeri

DateTime

Olayın oluşturulduğu zaman Elapsed .

Örnekler

Aşağıdaki örnek, iki saniyede bir Timer (2000 milisaniye) olayını başlatan Timer.Elapsed , olay için bir olay işleyicisi ayarlayan ve zamanlayıcıyı başlatan bir nesnenin örneğini oluşturur. Olay işleyicisi, her yükseltildiğinde özelliğin ElapsedEventArgs.SignalTime değerini görüntüler.

using namespace System;
using namespace System::Timers;

public ref class Example
{
private:
    static System::Timers::Timer^ aTimer;

public:
    static void Demo()
    {
        // Create a timer and set a two second interval.
        aTimer = gcnew System::Timers::Timer();
        aTimer->Interval = 2000;

        // Hook up the Elapsed event for the timer. 
        aTimer->Elapsed += gcnew System::Timers::ElapsedEventHandler(Example::OnTimedEvent);

        // Have the timer fire repeated events (true is the default)
        aTimer->AutoReset = true;

        // Start the timer
        aTimer->Enabled = true;

        Console::WriteLine("Press the Enter key to exit the program at any time... ");
        Console::ReadLine();
    }

private:
    static void OnTimedEvent(Object^ source, System::Timers::ElapsedEventArgs^ e)
    {
        Console::WriteLine("The Elapsed event was raised at {0}", e->SignalTime);
    }
};

int main()
{
    Example::Demo();
}
// The example displays output like the following: 
//       Press the Enter key to exit the program at any time... 
//       The Elapsed event was raised at 5/20/2015 8:48:58 PM 
//       The Elapsed event was raised at 5/20/2015 8:49:00 PM 
//       The Elapsed event was raised at 5/20/2015 8:49:02 PM 
//       The Elapsed event was raised at 5/20/2015 8:49:04 PM 
//       The Elapsed event was raised at 5/20/2015 8:49:06 PM

using System;
using System.Timers;

public class Example
{
    private static Timer aTimer;

    public static void Main()
    {
        // Create a timer and set a two second interval.
        aTimer = new System.Timers.Timer();
        aTimer.Interval = 2000;

        // Hook up the Elapsed event for the timer. 
        aTimer.Elapsed += OnTimedEvent;

        // Have the timer fire repeated events (true is the default)
        aTimer.AutoReset = true;

        // Start the timer
        aTimer.Enabled = true;

        Console.WriteLine("Press the Enter key to exit the program at any time... ");
        Console.ReadLine();
    }

    private static void OnTimedEvent(Object source, System.Timers.ElapsedEventArgs e)
    {
        Console.WriteLine("The Elapsed event was raised at {0}", e.SignalTime);
    }
}
// The example displays output like the following: 
//       Press the Enter key to exit the program at any time... 
//       The Elapsed event was raised at 5/20/2015 8:48:58 PM 
//       The Elapsed event was raised at 5/20/2015 8:49:00 PM 
//       The Elapsed event was raised at 5/20/2015 8:49:02 PM 
//       The Elapsed event was raised at 5/20/2015 8:49:04 PM 
//       The Elapsed event was raised at 5/20/2015 8:49:06 PM

open System.Timers

let onTimedEvent source (e: ElapsedEventArgs) =
    printfn $"The Elapsed event was raised at {e.SignalTime}"

// Create a timer and set a two second interval.
let aTimer = new Timer()
aTimer.Interval <- 2000

// Hook up the Elapsed event for the timer. 
aTimer.Elapsed.AddHandler onTimedEvent

// Have the timer fire repeated events (true is the default)
aTimer.AutoReset <- true

// Start the timer
aTimer.Enabled <- true

printfn "Press the Enter key to exit the program at any time... "
stdin.ReadLine() |> ignore

// The example displays output like the following: 
//       Press the Enter key to exit the program at any time... 
//       The Elapsed event was raised at 5/20/2015 8:48:58 PM 
//       The Elapsed event was raised at 5/20/2015 8:49:00 PM 
//       The Elapsed event was raised at 5/20/2015 8:49:02 PM 
//       The Elapsed event was raised at 5/20/2015 8:49:04 PM 
//       The Elapsed event was raised at 5/20/2015 8:49:06 PM

Imports System.Timers

Public Module Example
    Private aTimer As Timer

    Public Sub Main()
        ' Create a timer and set a two second interval.
        aTimer = New System.Timers.Timer()
        aTimer.Interval = 2000

        ' Hook up the Elapsed event for the timer.  
        AddHandler aTimer.Elapsed, AddressOf OnTimedEvent

        ' Have the timer fire repeated events (true is the default)
        aTimer.AutoReset = True

        ' Start the timer
        aTimer.Enabled = True

        Console.WriteLine("Press the Enter key to exit the program at any time... ")
        Console.ReadLine()
    End Sub

    Private Sub OnTimedEvent(source As Object, e As System.Timers.ElapsedEventArgs)
        Console.WriteLine("The Elapsed event was raised at {0}", e.SignalTime)
    End Sub
End Module
' The example displays output like the following: 
'       Press the Enter key to exit the program at any time... 
'       The Elapsed event was raised at 5/20/2015 8:48:58 PM 
'       The Elapsed event was raised at 5/20/2015 8:49:00 PM 
'       The Elapsed event was raised at 5/20/2015 8:49:02 PM 
'       The Elapsed event was raised at 5/20/2015 8:49:04 PM 
'       The Elapsed event was raised at 5/20/2015 8:49:06 PM

Açıklamalar

Olay Timer.Elapsed bir ThreadPool iş parçacığında tetiklendiğinden, olay işleme yöntemi bir iş parçacığında aynı anda çalıştırılabilir ve yönteme Timer.Stop yapılan çağrı başka bir iş parçacığında çalışır. Bu, yöntemi çağrıldıktan sonra Stop olayın tetiklenmesinin sonucu Elapsed olabilir. Olay işleme yöntemi yöntem çağrıldığında Stop zaten yürütülüyor olabileceği veya yöntemin çağrıldığı an ile durdurma süresinin kaydedildiği an Stop arasında yürütülüyor olabileceğinden, bu yarış durumu yalnızca özelliği yöntemin çağrıldığı zamanla Stop karşılaştırılarak SignalTime engellenemez. Olay işleme yöntemi yürütülürken yöntemini çağıran iş parçacığının Stop devam etmesini önlemek kritikse, sınıfı veya CompareExchange yöntemi gibi Monitor daha sağlam bir eşitleme mekanizması kullanın. yöntemini kullanan CompareExchange kod, yöntemin Timer.Stop örneğinde bulunabilir.

Ayrıca bkz.

• Stop()