DateTime.Equality(DateTime, DateTime) 運算子

定義

命名空間:

System

組件:

System.Runtime.dll

組件:

netstandard.dll

組件:

mscorlib.dll

判斷 DateTime 的兩個指定執行個體是否相等。

public:
 static bool operator ==(DateTime d1, DateTime d2);

public static bool operator == (DateTime d1, DateTime d2);

static member ( = ) : DateTime * DateTime -> bool

Public Shared Operator == (d1 As DateTime, d2 As DateTime) As Boolean

參數

d1

DateTime

要比較的第一個物件。

d2

DateTime

要比較的第二個物件。

傳回

Boolean

當 true 和 d1 代表相同的日期和時間時為 d2，否則為 false。

範例

下列範例示範等號比較運算子。

System::DateTime april19( 2001, 4, 19 );
System::DateTime otherDate( 1991, 6, 5 );

// areEqual gets false.
bool areEqual = april19 == otherDate;

otherDate = DateTime( 2001, 4, 19 );
// areEqual gets true.
areEqual = april19 == otherDate;

System.DateTime april19 = new DateTime(2001, 4, 19);
System.DateTime otherDate = new DateTime(1991, 6, 5);

// areEqual gets false.
bool areEqual = april19 == otherDate;
    
otherDate = new DateTime(2001, 4, 19);
// areEqual gets true.
areEqual = april19 == otherDate;

Dim april19 As New DateTime(2001, 4, 19)
Dim otherDate As New DateTime(1991, 6, 5)

Dim areEqual As Boolean
' areEqual gets false.
areEqual = DateTime.op_Equality(april19, otherDate)

otherDate = New DateTime(2001, 4, 19)
' areEqual gets true.
areEqual = System.DateTime.op_Equality(april19, otherDate)

備註

Equality運算子 DateTime 會藉由比較它們的刻度數目來判斷兩個值是否相等。 在比較 DateTime 物件之前，請確定物件代表相同時區的時間。 只要比較其 Kind 屬性的值，即可做到這一點。

這個運算子的對等方法是 DateTime.Equals(Object)

另請參閱

• Equals(DateTime)