Environment.TickCount 屬性

定義

命名空間:

System

組件:

System.Runtime.dll

來源:

Environment.CoreCLR.cs

取得系統啟動後經過的毫秒數。

public:
 static property int TickCount { int get(); };

public static int TickCount { get; }

static member TickCount : int

Public Shared ReadOnly Property TickCount As Integer

屬性值

Int32

32 位元帶正負號的整數，包含自上一次電腦啟動後所經過的毫秒時間量。

範例

下列範例示範如何擷取 屬性所 TickCount 傳回值的正範圍。 屬性 TickCount 會在 之間 Int32.MinValue 迴圈，這是負數，每 Int32.MaxValue 49.8 天一次。 此程式碼範例會移除符號位，以產生非負數，其會每隔 24.9 天迴圈一次零到 MaxValue 一次。

// 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 an output similar to the following:

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 an output similar to the following:

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.

open System

let result = Environment.TickCount &&& Int32.MaxValue
printfn $"TickCount: {result}"

// This example produces an output similar to the following:
//     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 an output similar to the following:
'
'TickCount: 101931139
'

備註

此屬性的值衍生自系統計時器，並儲存為 32 位帶正負號的整數。 請注意，因為它衍生自系統計時器，所以 屬性的 TickCount 解析度僅限於系統計時器的解析度，這通常介於 10 到 16 毫秒的範圍內。

重要

因為屬性值的值 TickCount 是 32 位帶正負號的整數，所以如果系統持續執行， TickCount 則會從零遞增到 Int32.MaxValue 大約 24.9 天，然後跳至 Int32.MinValue ，這是負數，然後在接下來 24.9 天內遞增回零。 您可以藉由呼叫 Windows GetTickCount 函式來解決此問題，此函式會在大約 49.7 天后重設為零，或呼叫 GetTickCount64 函式。

TickCount 不同于 DateTime.Ticks 屬性，這是自 1/0001/0001 12：00am 起經過的 100 奈秒間隔數目。

DateTime.Now使用 屬性可取得這部電腦上的目前本機日期和時間。