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TimeSpan.GetHashCode 方法

2013/12/13

返回此实例的哈希代码。

Namespace:  System
程序集:  mscorlib(位于 mscorlib.dll 中)

声明
Public Overrides Function GetHashCode As Integer

返回值

类型: System.Int32
32 位有符号整数哈希代码。

即使两个 TimeSpan 对象表示不同的时间值,它们也可能具有相同的哈希代码。

下面的代码示例使用 GetHashCode 方法生成几个 TimeSpan 对象的哈希代码。


' Example for the TimeSpan.GetHashCode( ) method.

Module Example
   Sub DisplayHashCode(ByVal outputBlock As System.Windows.Controls.TextBlock, ByVal interval As TimeSpan)

      ' Create a hash code and a string representation of 
      ' the TimeSpan parameter.
      Dim timeInterval As String = interval.ToString()
      Dim hashCode As Integer = interval.GetHashCode()

      ' Pad the end of the TimeSpan string with spaces if it 
      ' does not contain milliseconds.
      Dim pIndex As Integer = timeInterval.IndexOf(":"c)
      pIndex = timeInterval.IndexOf("."c, pIndex)
      If pIndex < 0 Then timeInterval &= "        "

      outputBlock.Text &= String.Format("{0,22}   0x{1:X8}, {1}", _
          timeInterval, hashCode) & vbCrLf
   End Sub

   Public Sub Demo(ByVal outputBlock As System.Windows.Controls.TextBlock)
      outputBlock.Text &= String.Format( _
          "This example of TimeSpan.Example( ) generates " & _
          "the following " & vbCrLf & "output, which displays " & _
          "the hash codes of representative TimeSpan " & vbCrLf & _
          "objects in hexadecimal and decimal formats." & vbCrLf) & vbCrLf
      outputBlock.Text &= String.Format("{0,22}   {1,10}", _
          "TimeSpan        ", "Hash Code") & vbCrLf
      outputBlock.Text &= String.Format("{0,22}   {1,10}", _
          "--------        ", "---------") & vbCrLf

      DisplayHashCode(outputBlock, New TimeSpan(0))
      DisplayHashCode(outputBlock, New TimeSpan(1))
      DisplayHashCode(outputBlock, New TimeSpan(0, 0, 0, 0, 1))
      DisplayHashCode(outputBlock, New TimeSpan(0, 0, 1))
      DisplayHashCode(outputBlock, New TimeSpan(0, 1, 0))
      DisplayHashCode(outputBlock, New TimeSpan(1, 0, 0))
      DisplayHashCode(outputBlock, New TimeSpan(36000000001))
      DisplayHashCode(outputBlock, New TimeSpan(0, 1, 0, 0, 1))
      DisplayHashCode(outputBlock, New TimeSpan(1, 0, 1))
      DisplayHashCode(outputBlock, New TimeSpan(1, 0, 0, 0))
      DisplayHashCode(outputBlock, New TimeSpan(864000000001))
      DisplayHashCode(outputBlock, New TimeSpan(1, 0, 0, 0, 1))
      DisplayHashCode(outputBlock, New TimeSpan(1, 0, 0, 1))
      DisplayHashCode(outputBlock, New TimeSpan(100, 0, 0, 0))
      DisplayHashCode(outputBlock, New TimeSpan(100, 0, 0, 0, 1))
      DisplayHashCode(outputBlock, New TimeSpan(100, 0, 0, 1))
   End Sub
End Module

' This example of TimeSpan.GetHashCode( ) generates the following
' output, which displays the hash codes of representative TimeSpan
' objects in hexadecimal and decimal formats.
' 
'       TimeSpan            Hash Code
'       --------            ---------
'       00:00:00           0x00000000, 0
'       00:00:00.0000001   0x00000001, 1
'       00:00:00.0010000   0x00002710, 10000
'       00:00:01           0x00989680, 10000000
'       00:01:00           0x23C34600, 600000000
'       01:00:00           0x61C46808, 1640261640
'       01:00:00.0000001   0x61C46809, 1640261641
'       01:00:00.0010000   0x61C48F18, 1640271640
'       01:00:01           0x625CFE88, 1650261640
'     1.00:00:00           0x2A69C0C9, 711573705
'     1.00:00:00.0000001   0x2A69C0C8, 711573704
'     1.00:00:00.0010000   0x2A69E7D9, 711583705
'     1.00:00:01           0x2B025649, 721573449
'   100.00:00:00           0x914F4E94, -1857073516
'   100.00:00:00.0010000   0x914F6984, -1857066620
'   100.00:00:01           0x91E7D814, -1847076844


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受以下版本支持: 8.0, 7.1, 7.0

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