TimeSpan.GetHashCode Method

May 11, 2014

Returns a hash code for this instance.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

'Declaration
Public Overrides Function GetHashCode As Integer

Return Value

Type: System.Int32
A 32-bit signed integer hash code.

Two TimeSpan objects might have the same hash code even though they represent different time values.

The following code example generates the hash codes of several TimeSpan objects using the GetHashCode method.


' 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


Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

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