Timer.Intervalとは何？わかりやすく解説 Weblio辞書

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.NET Framework クラスライブラリリファレンス

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Timer.Interval プロパティ

Elapsed イベントの発生間隔を取得または設定します。

名前空間: System.Timers
アセンブリ: System (system.dll 内)
構文

Visual Basic (宣言)

Public Property Interval As
 Double

Visual Basic (使用法)

Dim instance As Timer
Dim value As Double

value = instance.Interval

instance.Interval = value

public double Interval { get; set;
 }

C++

public:
property double Interval {
    double get ();
    void set (double value);
}

/** @property */
public double get_Interval ()

/** @property */
public void set_Interval (double value)

JScript

public function get Interval
 () : double

public function set Interval
 (value : double)

プロパティ値
ミリ秒単位での Elapsed イベントの発生間隔。既定値は 100 ミリ秒です。

例外

例外の種類	条件
ArgumentException	間隔が 0 以下です。

解説

Timer が開始した後に間隔を設定すると、カウントがリセットされます。たとえば、間隔を 5 秒に設定し、Enabled を true に設定した場合は、Enabled を設定した時刻からカウントが開始します。カウントが 3 秒のときに間隔を 10 秒にリセットした場合、最初の Elapsed イベントは Enabled を true に設定してから 13 秒後に発生します。

Enabled を true に設定し、AutoReset を false に設定した場合、Timer は最初に間隔が経過したときに、1 回だけ Elapsed イベントを発生させます。

使用例

5 秒ごとに、コンソールに "Hello World!" と表示する Timer を作成する例を次に示します。

この例では、System.Timers 名前空間を使用します。

Visual Basic

Imports System
Imports System.Timers

Public Class Timer1
    
    Public Shared Sub Main()
        ' Normally, the timer is declared at the class level, so
        ' that it doesn't go out of scope when the method ends.
        ' In this example, the timer is needed only while Main 
        ' is executing. However, KeepAlive must be used at the
        ' end of Main, to prevent the JIT compiler from allowing 
        ' aggressive garbage collection to occur before Main 
        ' ends.
        Dim aTimer As New
 System.Timers.Timer()

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

        ' Set the Interval to 2 seconds (2000 milliseconds).
        aTimer.Interval = 2000
        aTimer.Enabled = True
        
        Console.WriteLine("Press the Enter key to exit the program.")
        Console.ReadLine()

        ' Keep the timer alive until the end of Main.
        GC.KeepAlive(aTimer)
    End Sub
        
    ' Specify what you want to happen when the Elapsed event is 
    ' raised.
    Private Shared Sub OnTimedEvent(source
 As Object, e As ElapsedEventArgs)
        Console.WriteLine("Hello World!")
    End Sub
End Class

using System;
using System.Timers;

public class Timer1
{
    public static void Main()
    {
        // Normally, the timer is declared at the class level, so
        // that it doesn't go out of scope when the method ends.
        // In this example, the timer is needed only while Main 
        // is executing. However, KeepAlive must be used at the
        // end of Main, to prevent the JIT compiler from allowing 
        // aggressive garbage collection to occur before Main 
        // ends.
        System.Timers.Timer aTimer = new System.Timers.Timer();

        // Hook up the Elapsed event for the timer.
        aTimer.Elapsed += new ElapsedEventHandler(OnTimedEvent);

        // Set the Interval to 2 seconds (2000 milliseconds).
        aTimer.Interval = 2000;
        aTimer.Enabled = true;
 
        Console.WriteLine("Press the Enter key to exit the program.");
        Console.ReadLine();

        // Keep the timer alive until the end of Main.
        GC.KeepAlive(aTimer);
    }
 
    // Specify what you want to happen when the Elapsed event is 
    // raised.
    private static void
 OnTimedEvent(object source, ElapsedEventArgs e)
    {
        Console.WriteLine("Hello World!");
    }
}

C++

#using <system.dll>

using namespace System;
using namespace System::Timers;

public ref class Timer1
{
public:
   static void Demo()
   {
      // Normally, the timer is declared at the class level, so
      // that it doesn't go out of scope when the method ends.
      // In this example, the timer is needed only while Demo
      // is executing. However, KeepAlive must be used at the
      // end of Demo, to prevent the JIT compiler from allowing 
      // aggressive garbage collection to occur before Demo
      // ends.
      System::Timers::Timer^ aTimer = gcnew System::Timers::Timer;

      // Hook up the Elapsed event for the timer.
      aTimer->Elapsed += gcnew ElapsedEventHandler( Timer1::OnTimedEvent );
      
      // Set the Interval to 2 seconds (2000 milliseconds).
      aTimer->Interval = 2000;
      aTimer->Enabled = true;

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

      // Keep the timer alive until the end of the Demo method.
      GC::KeepAlive(aTimer);
   }


private:
   // Specify what you want to happen when the Elapsed event is 
   // raised.
   static void OnTimedEvent( Object^ /*source*/,
 ElapsedEventArgs^ /*e*/ )
   {
      Console::WriteLine( "Hello World!" );
   }

};

int main()
{
   Timer1::Demo();
}

プラットフォーム

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0

参照

関連項目
Timer クラス
Timer メンバ
System.Timers 名前空間
Timer.AutoReset プロパティ
Timer.Enabled プロパティ
Elapsed

Timer.Interval プロパティ

タイマ刻みの間隔 (ミリ秒単位) を取得または設定します。

名前空間: System.Windows.Forms
アセンブリ: System.Windows.Forms (system.windows.forms.dll 内)
構文

Visual Basic (宣言)

Public Property Interval As
 Integer

Visual Basic (使用法)

Dim instance As Timer
Dim value As Integer

value = instance.Interval

instance.Interval = value

public int Interval { get;
 set; }

C++

public:
property int Interval {
    int get ();
    void set (int value);
}

/** @property */
public int get_Interval ()

/** @property */
public void set_Interval (int
 value)

JScript

public function get Interval
 () : int

public function set Interval
 (value : int)

プロパティ値
タイマ刻みの間隔を表すミリ秒数。値は 1 以上です。

解説

間隔を秒単位で取得するには、この数値を 1,000 で除算します。

使用例

5 秒ごとにアラームを発生させる単純な間隔タイマを実装するコード例を次に示します。アラームが発生すると、MessageBox にアラームが起動した回数が表示され、タイマの実行を継続するかどうかをユーザーに問い合わせるメッセージが表示されます。

Visual Basic

Public Class Class1
    Private Shared myTimer As
 New System.Windows.Forms.Timer()
    Private Shared alarmCounter As
 Integer = 1
    Private Shared exitFlag As
 Boolean = False    
    
    ' This is the method to run when the timer is raised.
    Private Shared Sub TimerEventProcessor(myObject
 As Object, _
                                           myEventArgs As EventArgs)
        myTimer.Stop()
        
        ' Displays a message box asking whether to continue running
 the timer.
        If MessageBox.Show("Continue running?",
 "Count is: " & alarmCounter, _
                            MessageBoxButtons.YesNo) = DialogResult.Yes Then
            ' Restarts the timer and increments the counter.
            alarmCounter += 1
            myTimer.Enabled = True
        Else
            ' Stops the timer.
            exitFlag = True
        End If
    End Sub
    
    Public Shared Sub Main()
        ' Adds the event and the event handler for the method that will
        ' process the timer event to the timer.
        AddHandler myTimer.Tick, AddressOf
 TimerEventProcessor
        
        ' Sets the timer interval to 5 seconds.
        myTimer.Interval = 5000
        myTimer.Start()
        
        ' Runs the timer, and raises the event.
        While exitFlag = False
            ' Processes all the events in the queue.
            Application.DoEvents()
        End While

    End Sub    

End Class

public class Class1 {
    static System.Windows.Forms.Timer myTimer = new
 System.Windows.Forms.Timer();
    static int alarmCounter = 1;
    static bool exitFlag = false;
 
    // This is the method to run when the timer is raised.
    private static void
 TimerEventProcessor(Object myObject,
                                            EventArgs myEventArgs) {
       myTimer.Stop();
 
       // Displays a message box asking whether to continue running
 the timer.
       if(MessageBox.Show("Continue running?", "Count
 is: " + alarmCounter, 
          MessageBoxButtons.YesNo) == DialogResult.Yes) {
          // Restarts the timer and increments the counter.
          alarmCounter +=1;
          myTimer.Enabled = true;
       }
       else {
          // Stops the timer.
          exitFlag = true;
       }
    }
 
    public static int Main()
 {
       /* Adds the event and the event handler for the method
 that will 
          process the timer event to the timer. */
       myTimer.Tick += new EventHandler(TimerEventProcessor);
 
       // Sets the timer interval to 5 seconds.
       myTimer.Interval = 5000;
       myTimer.Start();
 
       // Runs the timer, and raises the event.
       while(exitFlag == false) {
          // Processes all the events in the queue.
          Application.DoEvents();
       }
    return 0;
    }
 }

C++

public ref class Class1
{
private:
   static System::Windows::Forms::Timer^ myTimer = gcnew System::Windows::Forms::Timer;
   static int alarmCounter = 1;
   static bool exitFlag = false;

   // This is the method to run when the timer is raised.
   static void TimerEventProcessor( Object^
 /*myObject*/, EventArgs^ /*myEventArgs*/ )
   {
      myTimer->Stop();
      
      // Displays a message box asking whether to continue running the
 timer.
      if ( MessageBox::Show( "Continue running?", String::Format(
 "Count is: {0}", alarmCounter ), MessageBoxButtons::YesNo ) == DialogResult::Yes
 )
      {
         
         // Restarts the timer and increments the counter.
         alarmCounter += 1;
         myTimer->Enabled = true;
      }
      else
      {
         
         // Stops the timer.
         exitFlag = true;
      }
   }


public:
   static void Main()
   {
      
      /* Adds the event and the event handler for the method that
 will 
                process the timer event to the timer. */
      myTimer->Tick += gcnew EventHandler( TimerEventProcessor );
      
      // Sets the timer interval to 5 seconds.
      myTimer->Interval = 5000;
      myTimer->Start();
      
      // Runs the timer, and raises the event.
      while ( exitFlag == false )
      {
         
         // Processes all the events in the queue.
         Application::DoEvents();
      }
   }

};

int main()
{
   Class1::Main();
}

public class Class1
{
    private static System.Windows.Forms.Timer
 myTimer = 
        new System.Windows.Forms.Timer();
    private static int alarmCounter
 = 1;
    private static boolean exitFlag = false;

    // This is the method to run when the timer is raised.
    private static void
 TimerEventProcessor(Object myObject, 
                                            EventArgs myEventArgs)
    {
        myTimer.Stop();

        // Displays a message box asking whether to continue running
 the timer.
        if (MessageBox.Show("Continue running?", "Count
 is: " 
            + alarmCounter, MessageBoxButtons.YesNo).Equals(DialogResult.Yes)) {
            // Restarts the timer and increments the counter.
            alarmCounter += 1;
            myTimer.set_Enabled(true);
        }
        else {
            // Stops the timer.
            exitFlag = true;
        }
    } //TimerEventProcessor

    public static void main(String[]
 args)
    {
        /* Adds the event and the event handler for the method
 that will 
           process the timer event to the timer. 
         */
        myTimer.add_Tick(new EventHandler(TimerEventProcessor));

        // Sets the timer interval to 5 seconds.
        myTimer.set_Interval(5000);
        myTimer.Start();

        // Runs the timer, and raises the event.
        while (exitFlag == false) {
            // Processes all the events in the queue.
            Application.DoEvents();
        }
        return;
    } //main
} //Class1