Environment.TickCount プロパティ

定義

システム起動後のミリ秒単位の経過時間を取得します。Gets the number of milliseconds elapsed since the system started.

public:
 static property int TickCount { int get(); };
public static int TickCount { get; }
member this.TickCount : int
Public Shared ReadOnly Property TickCount As Integer

プロパティ値

コンピューターが最後に起動してからの経過時間をミリ秒単位で保持している 32 ビット符号付き整数。A 32-bit signed integer containing the amount of time in milliseconds that has passed since the last time the computer was started.

次の例では、TickCount プロパティによって返される値の正の範囲を取得する方法を示します。The following example demonstrates how to retrieve the positive range of values returned by the TickCount property. TickCount プロパティは、Int32.MinValue間を切り替えます。これは負の数値であり、49.8 日に1回 Int32.MaxValue ます。The TickCount property cycles between Int32.MinValue, which is a negative number, and Int32.MaxValue once every 49.8 days. このコードサンプルでは、符号ビットを削除して、0 ~ MaxValue を24.9 日に1回ずつ循環する負でない数値を生成します。This code sample removes the sign bit to yield a nonnegative number that cycles between zero and MaxValue once every 24.9 days.

// Sample for the Environment::TickCount property
// TickCount cycles between Int32::MinValue, which is a negative 
// number, and Int32::MaxValue once every 49.8 days. This sample
// removes the sign bit to yield a nonnegative number that cycles 
// between zero and Int32::MaxValue once every 24.9 days.
using namespace System;
int main()
{
   int result = Environment::TickCount & Int32::MaxValue;
   Console::WriteLine( "TickCount: {0}", result );
}

/*
This example produces the following results:

TickCount: 101931139
*/
// Sample for the Environment.TickCount property.

// TickCount cycles between Int32.MinValue, which is a negative 
// number, and Int32.MaxValue once every 49.8 days. This sample
// removes the sign bit to yield a nonnegative number that cycles 
// between zero and Int32.MaxValue once every 24.9 days.

using System;

class Sample 
{
    public static void Main() 
    {
    int result = Environment.TickCount & Int32.MaxValue;
    Console.WriteLine("TickCount: {0}", result);
    }
}
/*
This example produces the following results:

TickCount: 101931139
*/

' Sample for the Environment.TickCount property.
' TickCount cycles between Int32.MinValue, which is a negative 
' number, and Int32.MaxValue once every 49.8 days. This sample
' removes the sign bit to yield a nonnegative number that cycles 
' between zero and Int32.MaxValue once every 24.9 days.

Class Sample
   Public Shared Sub Main()
      Dim result As Integer = Environment.TickCount And Int32.MaxValue

      Console.WriteLine("TickCount: {0}", result)
   End Sub
End Class
'
'This example produces the following results:
'
'TickCount: 101931139
'

注釈

このプロパティの値はシステムタイマーから派生し、32ビット符号付き整数として格納されます。The value of this property is derived from the system timer and is stored as a 32-bit signed integer. システムタイマーから派生しているため、TickCount プロパティの解決はシステムタイマーの解決に限定されます。これは通常、10 ~ 16 ミリ秒の範囲内です。Note that, because it is derived from the system timer, the resolution of the TickCount property is limited to the resolution of the system timer, which is typically in the range of 10 to 16 milliseconds.

重要

TickCount プロパティ値の値は32ビット符号付き整数であるため、システムが連続して実行されている場合は、TickCount は約24.9 日間に0から Int32.MaxValue にインクリメントされ、負の数の Int32.MinValueに移動した後、次の24.9 日に0に戻されます。Because the value of the TickCount property value is a 32-bit signed integer, if the system runs continuously, TickCount will increment from zero to Int32.MaxValue for approximately 24.9 days, then jump to Int32.MinValue, which is a negative number, then increment back to zero during the next 24.9 days. この問題を回避するには、Windows GetTickCount関数を呼び出します。この関数は、約49.7 日後に0にリセットするか、 GetTickCount64関数を呼び出します。You can work around this issue by calling the Windows GetTickCount function, which resets to zero after approximately 49.7 days, or by calling the GetTickCount64 function.

TickCountDateTime.Ticks プロパティとは異なります。これは、1/1/0001, 12:00 am から経過した100ナノ秒間隔の数です。TickCount is different from the DateTime.Ticks property, which is the number of 100-nanosecond intervals that have elapsed since 1/1/0001, 12:00am.

このコンピューターの現在のローカルの日付と時刻を取得するには、DateTime.Now プロパティを使用します。Use the DateTime.Now property to obtain the current local date and time on this computer.

適用対象