Stopwatch.IsHighResolution Champ
Définition
Important
Certaines informations portent sur la préversion du produit qui est susceptible d’être en grande partie modifiée avant sa publication. Microsoft exclut toute garantie, expresse ou implicite, concernant les informations fournies ici.
Indique si la minuterie est basée sur un compteur de performance haute résolution. Ce champ est en lecture seule.
public: static initonly bool IsHighResolution;public static readonly bool IsHighResolution; staticval mutable IsHighResolution : boolPublic Shared ReadOnly IsHighResolution As Boolean Valeur de champ
Exemples
L’exemple suivant affiche la fréquence et la résolution d’un Stopwatch minuteur. Cet exemple de code fait partie d’un exemple plus grand fourni pour la Stopwatch classe .
void DisplayTimerProperties()
{
// Display the timer frequency and resolution.
if ( Stopwatch::IsHighResolution )
{
Console::WriteLine( "Operations timed using the system's high-resolution performance counter." );
}
else
{
Console::WriteLine( "Operations timed using the DateTime class." );
}
Int64 frequency = Stopwatch::Frequency;
Console::WriteLine( " Timer frequency in ticks per second = {0}", frequency );
Int64 nanosecPerTick = (1000L * 1000L * 1000L) / frequency;
Console::WriteLine( " Timer is accurate within {0} nanoseconds", nanosecPerTick );
}
public static void DisplayTimerProperties()
{
// Display the timer frequency and resolution.
if (Stopwatch.IsHighResolution)
{
Console.WriteLine("Operations timed using the system's high-resolution performance counter.");
}
else
{
Console.WriteLine("Operations timed using the DateTime class.");
}
long frequency = Stopwatch.Frequency;
Console.WriteLine(" Timer frequency in ticks per second = {0}",
frequency);
long nanosecPerTick = (1000L*1000L*1000L) / frequency;
Console.WriteLine(" Timer is accurate within {0} nanoseconds",
nanosecPerTick);
}
Public Shared Sub DisplayTimerProperties()
' Display the timer frequency and resolution.
If Stopwatch.IsHighResolution Then
Console.WriteLine("Operations timed using the system's high-resolution performance counter.")
Else
Console.WriteLine("Operations timed using the DateTime class.")
End If
Dim frequency As Long = Stopwatch.Frequency
Console.WriteLine(" Timer frequency in ticks per second = {0}", frequency)
Dim nanosecPerTick As Long = 1000000000 / frequency
Console.WriteLine(" Timer is accurate within {0} nanoseconds", nanosecPerTick)
End Sub
Remarques
Le minuteur utilisé par la Stopwatch classe dépend du matériel système et du système d’exploitation. IsHighResolution est true si le Stopwatch minuteur est basé sur un compteur de performances haute résolution. Sinon, IsHighResolution est false, ce qui indique que le Stopwatch minuteur est basé sur le minuteur système.
