Export (0) Print
Expand All

ValueType.Equals Method

Indicates whether this instance and a specified object are equal.

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

'Declaration
Public Overrides Function Equals ( _
	obj As Object _
) As Boolean
'Usage
Dim instance As ValueType 
Dim obj As Object 
Dim returnValue As Boolean 

returnValue = instance.Equals(obj)

Parameters

obj
Type: System.Object

Another object to compare to.

Return Value

Type: System.Boolean
true if obj and this instance are the same type and represent the same value; otherwise, false.

The default implementation of the Equals method uses reflection to compare the corresponding fields of obj and this instance. Override the Equals method for a particular type to improve the performance of the method and more closely represent the concept of equality for the type.

The following example demonstrates how the Equals method can be overridden by a derived value type.

Public Structure Complex
   Private m_Re As Double 
   Private m_Im As Double 

   Public Overloads Function Equals(ob As Object) As Boolean 
      If TypeOf ob Is Complex Then 
         Dim c As Complex = CType(ob, Complex)
         Return m_Re = c.m_Re And m_Im = c.m_Im
      Else 
         Return False 
      End If 
   End Function 


   Public Overloads Function GetHashCode() As Integer 
      Return m_Re.GetHashCode() ^ m_Im.GetHashCode()
   End Function 

End Structure

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0

Community Additions

ADD
Show:
© 2014 Microsoft