Stopwatch.ElapsedTicks 属性

定义

命名空间:

System.Diagnostics

程序集:

System.Runtime.dll

Source:

Stopwatch.cs

获取当前实例测量得出的总运行时间（用计时器刻度表示）。

public:
 property long ElapsedTicks { long get(); };

public long ElapsedTicks { get; }

member this.ElapsedTicks : int64

Public ReadOnly Property ElapsedTicks As Long

属性值

Int64

一个只读长整型，表示当前实例测量得出的计时器刻度总数。

示例

以下示例使用 Stopwatch 类来度量四个不同实现的性能，以便分析字符串中的整数。 此代码示例是为 Stopwatch 类提供的一个更大示例的一部分。

Int64 ticksThisTime = 0;
int inputNum;
Stopwatch ^ timePerParse;
switch ( operation )
{
   case 0:
      
      // Parse a valid integer using
      // a try-catch statement.
      // Start a new stopwatch timer.
      timePerParse = Stopwatch::StartNew();
      try
      {
         inputNum = Int32::Parse( "0" );
      }
      catch ( FormatException^ ) 
      {
         inputNum = 0;
      }

      // Stop the timer, and save the
      // elapsed ticks for the operation.
      timePerParse->Stop();
      ticksThisTime = timePerParse->ElapsedTicks;
      break;

   case 1:
      
      // Parse a valid integer using
      // the TryParse statement.
      // Start a new stopwatch timer.
      timePerParse = Stopwatch::StartNew();
      if (  !Int32::TryParse( "0", inputNum ) )
      {
         inputNum = 0;
      }
      
      // Stop the timer, and save the
      // elapsed ticks for the operation.
      timePerParse->Stop();
      ticksThisTime = timePerParse->ElapsedTicks;
      break;

   case 2:
      
      // Parse an invalid value using
      // a try-catch statement.
      // Start a new stopwatch timer.
      timePerParse = Stopwatch::StartNew();
      try
      {
         inputNum = Int32::Parse( "a" );
      }
      catch ( FormatException^ ) 
      {
         inputNum = 0;
      }

      // Stop the timer, and save the
      // elapsed ticks for the operation.
      timePerParse->Stop();
      ticksThisTime = timePerParse->ElapsedTicks;
      break;

   case 3:
      
      // Parse an invalid value using
      // the TryParse statement.
      // Start a new stopwatch timer.
      timePerParse = Stopwatch::StartNew();
      if (  !Int32::TryParse( "a", inputNum ) )
      {
         inputNum = 0;
      }
      
      // Stop the timer, and save the
      // elapsed ticks for the operation.
      timePerParse->Stop();
      ticksThisTime = timePerParse->ElapsedTicks;
      break;

   default:
      break;
}

long ticksThisTime = 0;
int inputNum;
Stopwatch timePerParse;

switch (operation)
{
    case 0:
        // Parse a valid integer using
        // a try-catch statement.

        // Start a new stopwatch timer.
        timePerParse = Stopwatch.StartNew();

        try
        {
            inputNum = Int32.Parse("0");
        }
        catch (FormatException)
        {
            inputNum = 0;
        }

        // Stop the timer, and save the
        // elapsed ticks for the operation.

        timePerParse.Stop();
        ticksThisTime = timePerParse.ElapsedTicks;
        break;
    case 1:
        // Parse a valid integer using
        // the TryParse statement.

        // Start a new stopwatch timer.
        timePerParse = Stopwatch.StartNew();

        if (!Int32.TryParse("0", out inputNum))
        {
            inputNum = 0;
        }

        // Stop the timer, and save the
        // elapsed ticks for the operation.
        timePerParse.Stop();
        ticksThisTime = timePerParse.ElapsedTicks;
        break;
    case 2:
        // Parse an invalid value using
        // a try-catch statement.

        // Start a new stopwatch timer.
        timePerParse = Stopwatch.StartNew();

        try
        {
            inputNum = Int32.Parse("a");
        }
        catch (FormatException)
        {
            inputNum = 0;
        }

        // Stop the timer, and save the
        // elapsed ticks for the operation.
        timePerParse.Stop();
        ticksThisTime = timePerParse.ElapsedTicks;
        break;
    case 3:
        // Parse an invalid value using
        // the TryParse statement.

        // Start a new stopwatch timer.
        timePerParse = Stopwatch.StartNew();

        if (!Int32.TryParse("a", out inputNum))
        {
            inputNum = 0;
        }

        // Stop the timer, and save the
        // elapsed ticks for the operation.
        timePerParse.Stop();
        ticksThisTime = timePerParse.ElapsedTicks;
        break;

    default:
        break;
}

Dim ticksThisTime As Long = 0
Dim inputNum As Integer
Dim timePerParse As Stopwatch

Select Case operation
   Case 0
      ' Parse a valid integer using
      ' a try-catch statement.
      ' Start a new stopwatch timer.
      timePerParse = Stopwatch.StartNew()
      
      Try
         inputNum = Int32.Parse("0")
      Catch e As FormatException
         inputNum = 0
      End Try
      
      ' Stop the timer, and save the
      ' elapsed ticks for the operation.
      timePerParse.Stop()
      ticksThisTime = timePerParse.ElapsedTicks
   Case 1
      ' Parse a valid integer using
      ' the TryParse statement.
      ' Start a new stopwatch timer.
      timePerParse = Stopwatch.StartNew()
      
      If Not Int32.TryParse("0", inputNum) Then
         inputNum = 0
      End If
      
      ' Stop the timer, and save the
      ' elapsed ticks for the operation.
      timePerParse.Stop()
      ticksThisTime = timePerParse.ElapsedTicks
   Case 2
      ' Parse an invalid value using
      ' a try-catch statement.
      ' Start a new stopwatch timer.
      timePerParse = Stopwatch.StartNew()
      
      Try
         inputNum = Int32.Parse("a")
      Catch e As FormatException
         inputNum = 0
      End Try
      
      ' Stop the timer, and save the
      ' elapsed ticks for the operation.
      timePerParse.Stop()
      ticksThisTime = timePerParse.ElapsedTicks
   Case 3
      ' Parse an invalid value using
      ' the TryParse statement.
      ' Start a new stopwatch timer.
      timePerParse = Stopwatch.StartNew()
      
      If Not Int32.TryParse("a", inputNum) Then
         inputNum = 0
      End If
      
      ' Stop the timer, and save the
      ' elapsed ticks for the operation.
      timePerParse.Stop()
      ticksThisTime = timePerParse.ElapsedTicks
   
   Case Else
End Select

注解

此属性表示基础计时器机制中经过的计时周期数。 时钟周期是计时器可以测量的 Stopwatch 最小时间单位。 Frequency使用 字段将ElapsedTicks值转换为秒数。

当实例正在运行或停止时Stopwatch，可以查询属性 Elapsed、 ElapsedMilliseconds和 ElapsedTicks 。 运行时，经过的时间属性会稳步增加 Stopwatch ;在实例停止时它们保持不变。

默认情况下，实例的已用时间值等于所有测量时间间隔的总和 Stopwatch 。 对 的每次调用 Start 在累积已用时间开始计数;每次调用结束 Stop 当前间隔度量并冻结累积已用时间值。 Reset使用 方法清除现有Stopwatch实例中的累积已用时间。

注意

Stopwatch 刻度与 不同 DateTime.Ticks。 值中的每个 DateTime.Ticks 刻度表示一个 100 纳秒的间隔。 值中的每个 ElapsedTicks 刻度表示等于 1 秒除以 的 Frequency时间间隔。

另请参阅

• Elapsed
• ElapsedMilliseconds
• Frequency