DateTime.Equals DateTime.Equals DateTime.Equals DateTime.Equals Method

Definition

Returns a value indicating whether two DateTime objects, or a DateTime instance and another object or DateTime, have the same value.

Overloads

Equals(DateTime, DateTime) Equals(DateTime, DateTime) Equals(DateTime, DateTime) Equals(DateTime, DateTime)

Returns a value indicating whether two DateTime instances have the same date and time value.

Equals(DateTime) Equals(DateTime) Equals(DateTime) Equals(DateTime)

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

Equals(Object) Equals(Object) Equals(Object) Equals(Object)

Returns a value indicating whether this instance is equal to a specified object.

Equals(DateTime, DateTime) Equals(DateTime, DateTime) Equals(DateTime, DateTime) Equals(DateTime, DateTime)

Returns a value indicating whether two DateTime instances have the same date and time value.

public:
 static bool Equals(DateTime t1, DateTime t2);
public static bool Equals (DateTime t1, DateTime t2);
static member Equals : DateTime * DateTime -> bool
Public Shared Function Equals (t1 As DateTime, t2 As DateTime) As Boolean

Parameters

t1
DateTime DateTime DateTime DateTime

The first object to compare.

t2
DateTime DateTime DateTime DateTime

The second object to compare.

Returns

true if the two values are equal; otherwise, false.

Examples

The following example demonstrates the Equals method.

System::DateTime today1 = System::DateTime(
   System::DateTime::Today.Ticks );
System::DateTime today2 = System::DateTime(
   System::DateTime::Today.Ticks );
System::DateTime tomorrow = System::DateTime(
   System::DateTime::Today.AddDays( 1 ).Ticks );

// todayEqualsToday gets true.
bool todayEqualsToday = System::DateTime::Equals( today1, today2 );

// todayEqualsTomorrow gets false.
bool todayEqualsTomorrow = System::DateTime::Equals( today1, tomorrow );
System.DateTime today1 = 
		new System.DateTime(System.DateTime.Today.Ticks);
System.DateTime today2 = 
		new System.DateTime(System.DateTime.Today.Ticks);
System.DateTime tomorrow = 
		new System.DateTime(
					System.DateTime.Today.AddDays(1).Ticks);

// todayEqualsToday gets true.
bool todayEqualsToday = System.DateTime.Equals(today1, today2);

// todayEqualsTomorrow gets false.
bool todayEqualsTomorrow = System.DateTime.Equals(today1, tomorrow);
Dim today1 As New System.DateTime(System.DateTime.Today.Ticks)
Dim today2 As New System.DateTime(System.DateTime.Today.Ticks)
Dim tomorrow As New System.DateTime( _
                        System.DateTime.Today.AddDays(1).Ticks)

' todayEqualsToday gets true.
Dim todayEqualsToday As Boolean = System.DateTime.Equals(today1, today2)

' todayEqualsTomorrow gets false.
Dim todayEqualsTomorrow As Boolean = System.DateTime.Equals(today1, tomorrow)

Remarks

t1 and t2 are equal if their Ticks property values are equal. Their Kind property values are not considered in the test for equality.

See also

Equals(DateTime) Equals(DateTime) Equals(DateTime) Equals(DateTime)

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

public:
 virtual bool Equals(DateTime value);
public bool Equals (DateTime value);
override this.Equals : DateTime -> bool
Public Function Equals (value As DateTime) As Boolean

Parameters

value
DateTime DateTime DateTime DateTime

The object to compare to this instance.

Returns

true if the value parameter equals the value of this instance; otherwise, false.

Implements

Examples

The following example demonstrates the Equals method.

using System;

public class Application
{
    public static void Main()
    {
        // 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);

        Console.WriteLine("The result of comparing DateTime object one and two is: {0}.", result);

        result = one.Equals(three);

        Console.WriteLine("The result of comparing DateTime object one and three is: {0}.", result);
    }
}

// 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.
Imports System

Module Application

    Sub Main()
        ' 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)

        Console.WriteLine("The result of comparing DateTime object one and two is: {0}.", result)

        result = one.Equals(three)

        Console.WriteLine("The result of comparing DateTime object one and three is: {0}.", result)

    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.

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.

See also

Equals(Object) Equals(Object) Equals(Object) Equals(Object)

Returns a value indicating whether this instance is equal to a specified object.

public:
 override bool Equals(System::Object ^ value);
public override bool Equals (object value);
override this.Equals : obj -> bool
Public Overrides Function Equals (value As Object) As Boolean

Parameters

value
Object Object Object Object

The object to compare to this instance.

Returns

true if value is an instance of DateTime and equals the value of this instance; otherwise, false.

Examples

The following example demonstrates the Equals method.

using System;

public class Application
{
    public static void Main()
    {
        // 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);

        Console.WriteLine("The result of comparing DateTime object one and two is: {0}.", result);

        result = one.Equals(three);

        Console.WriteLine("The result of comparing DateTime object one and three is: {0}.", result);
    }
}

// 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.
Imports System

Module Application

    Sub Main()
        ' 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)

        Console.WriteLine("The result of comparing DateTime object one and two is: {0}.", result)

        result = one.Equals(three)

        Console.WriteLine("The result of comparing DateTime object one and three is: {0}.", result)

    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.

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.

See also

Applies to