Artikel
11/17/2011

DateTime.Equals Method (DateTime)

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Updated: December 2010

Returns a value indicating whether the value of this instance is equal to the value of the specified DateTime instance.

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

Syntax

'Declaration
Public Function Equals ( _
    value As DateTime _
) As Boolean

public bool Equals(
    DateTime value
)

Parameters

value
Type: System.DateTime
The object to compare to this instance.

Return Value

Type: System.Boolean
true if the value parameter equals the value of this instance; otherwise, false.

Implements

IEquatable<T>.Equals(T)

Remarks

The current instance and value are equal if their Ticks property values are equal. Their Kind property values are not considered in the test for equality.

This method implements the System.IEquatable<T> interface, and performs slightly better than the Equals method because the value parameter does not have to be converted to an object.

Examples

The following example demonstrates the Equals method.


Module Example

   Public Sub Demo(ByVal outputBlock As System.Windows.Controls.TextBlock)
      ' Create some DateTime objects.
      Dim one As DateTime = DateTime.UtcNow

      Dim two As DateTime = DateTime.Now

      Dim three As DateTime = one

      ' Compare the DateTime objects and display the results.
      Dim result As Boolean = one.Equals(two)

      outputBlock.Text += String.Format("The result of comparing DateTime object one and two is: {0}.", result) & vbCrLf

      result = one.Equals(three)

      outputBlock.Text += String.Format("The result of comparing DateTime object one and three is: {0}.", result) & vbCrLf

   End Sub
End Module

' This code example displays the following:
'
' The result of comparing DateTime object one and two is: False.
' The result of comparing DateTime object one and three is: True.

using System;

public class Example
{
   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
   {
      // Create some DateTime objects.
      DateTime one = DateTime.UtcNow;

      DateTime two = DateTime.Now;

      DateTime three = one;

      // Compare the DateTime objects and display the results.
      bool result = one.Equals(two);

      outputBlock.Text += String.Format("The result of comparing DateTime object one and two is: {0}.", result) + "\n";

      result = one.Equals(three);

      outputBlock.Text += String.Format("The result of comparing DateTime object one and three is: {0}.", result) + "\n";
   }
}

// This code example displays the following:
//
// The result of comparing DateTime object one and two is: False.
// The result of comparing DateTime object one and three is: True.

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

Change History

Date	History	Reason
December 2010	Added a definition of date and time equality.	Customer feedback.

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