DateTime.Equals Metoda

Definice

Obor názvů:

System

Sestavení:

netstandard.dll, System.Runtime.dll

Vrátí hodnotu určující, zda dva DateTime objekty, nebo DateTime instance a jiný objekt, nebo DateTime, mají stejnou hodnotu.

Přetížení

Name	Description
Equals(DateTime)	Vrátí hodnotu určující, zda je hodnota této instance rovna hodnotě zadané DateTime instance.
Equals(Object)	Vrátí hodnotu určující, zda je tato instance rovna zadanému objektu.
Equals(DateTime, DateTime)	Vrátí hodnotu určující, zda mají dvě DateTime instance stejnou hodnotu data a času.

Equals(DateTime)

Zdroj:

DateTime.cs

Vrátí hodnotu určující, zda je hodnota této instance rovna hodnotě zadané 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

Parametry

value

DateTime

Objekt, který chcete porovnat s touto instancí.

Návraty

Boolean

true pokud se value parametr rovná hodnotě této instance; falsev opačném případě .

Implementuje

Equals(T)

Příklady

Následující příklad ukazuje metodu Equals .

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.

open System

// Create some DateTime objects.
let one = DateTime.UtcNow

let two = DateTime.Now

let three = one

// Compare the DateTime objects and display the results.
let result = one.Equals two

printfn $"The result of comparing DateTime object one and two is: {result}."

let result2 = one.Equals three

printfn $"The result of comparing DateTime object one and three is: {result2}."

// 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.

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.

Poznámky

Aktuální instance a value jsou stejné, pokud jsou jejich Ticks hodnoty vlastnosti stejné. Jejich Kind hodnoty vlastností se v testu nedají považovat za rovnost.

Tato metoda implementuje System.IEquatable<T> rozhraní a provádí mírně lépe než Equals metoda, protože value parametr nemusí být převeden na objekt.

Viz také

• Equals(Object)
• Compare(DateTime, DateTime)
• CompareTo(Object)

Equals(Object)

Zdroj:

DateTime.cs

Vrátí hodnotu určující, zda je tato instance rovna zadanému objektu.

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

Parametry

value

Object

Objekt, který chcete porovnat s touto instancí.

Návraty

Boolean

truepokud value je instance této instance DateTime a rovná se hodnotě této instance; v opačném případě . false

Příklady

Následující příklad ukazuje metodu Equals .

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.

open System

// Create some DateTime objects.
let one = DateTime.UtcNow

let two = DateTime.Now

let three = one

// Compare the DateTime objects and display the results.
let result = one.Equals two

printfn $"The result of comparing DateTime object one and two is: {result}."

let result2 = one.Equals three

printfn $"The result of comparing DateTime object one and three is: {result2}."

// 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.

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.

Poznámky

Aktuální instance a value jsou stejné, pokud jsou jejich Ticks hodnoty vlastnosti stejné. Jejich Kind hodnoty vlastností se v testu nedají považovat za rovnost.

Viz také

• Compare(DateTime, DateTime)
• CompareTo(Object)

Equals(DateTime, DateTime)

Zdroj:

DateTime.cs

Vrátí hodnotu určující, zda mají dvě DateTime instance stejnou hodnotu data a času.

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

Parametry

t1

DateTime

První objekt, který se má porovnat.

t2

DateTime

Druhý objekt, který chcete porovnat.

Návraty

Boolean

truejsou-li dvě hodnoty stejné; v opačném případě . false

Příklady

Následující příklad ukazuje metodu Equals .

let today1 = 
    System.DateTime System.DateTime.Today.Ticks

let today2 =
    System.DateTime System.DateTime.Today.Ticks

let tomorrow =
    System.DateTime.Today.AddDays(1).Ticks
    |> System.DateTime 

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

// todayEqualsTomorrow gets false.
let 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)

Poznámky

t1 a t2 jsou stejné, pokud jsou jejich Ticks hodnoty vlastností stejné. Jejich Kind hodnoty vlastností se v testu nedají považovat za rovnost.

Viz také

• Boolean
• Compare(DateTime, DateTime)
• CompareTo(Object)