DateTimeOffset.EqualsExact(DateTimeOffset) 方法

定义

命名空间:

System

程序集:

System.Runtime.dll

程序集:

mscorlib.dll

程序集:

netstandard.dll

确定当前的 DateTimeOffset 对象与指定的 DateTimeOffset 对象是否表示同一时间并且是否具有相同的偏移量。

public:
 bool EqualsExact(DateTimeOffset other);

public bool EqualsExact (DateTimeOffset other);

member this.EqualsExact : DateTimeOffset -> bool

Public Function EqualsExact (other As DateTimeOffset) As Boolean

参数

other

DateTimeOffset

要与当前 DateTimeOffset 对象进行比较的对象。

返回

Boolean

如果当前的 DateTimeOffset 对象与 other 具有相同的日期和时间值以及相同的 Offset 值，则为 true；否则为 false。

示例

下面的示例演示了如何使用 EqualsExact 该方法比较类似的 DateTimeOffset 对象。

DateTimeOffset instanceTime = new DateTimeOffset(2007, 10, 31, 0, 0, 0,
                              DateTimeOffset.Now.Offset);

DateTimeOffset otherTime = instanceTime;
Console.WriteLine("{0} = {1}: {2}",
                  instanceTime, otherTime,
                  instanceTime.EqualsExact(otherTime));

otherTime = new DateTimeOffset(instanceTime.DateTime,
            TimeSpan.FromHours(instanceTime.Offset.Hours + 1));
Console.WriteLine("{0} = {1}: {2}",
                  instanceTime, otherTime,
                  instanceTime.EqualsExact(otherTime));

otherTime = new DateTimeOffset(instanceTime.DateTime + TimeSpan.FromHours(1),
                TimeSpan.FromHours(instanceTime.Offset.Hours + 1));
Console.WriteLine("{0} = {1}: {2}",
                  instanceTime, otherTime,
                  instanceTime.EqualsExact(otherTime));
// The example produces the following output:
//       10/31/2007 12:00:00 AM -07:00 = 10/31/2007 12:00:00 AM -07:00: True
//       10/31/2007 12:00:00 AM -07:00 = 10/31/2007 12:00:00 AM -06:00: False
//       10/31/2007 12:00:00 AM -07:00 = 10/31/2007 1:00:00 AM -06:00: False

let instanceTime = DateTimeOffset(2007, 10, 31, 0, 0, 0, DateTimeOffset.Now.Offset)

let otherTime = instanceTime
printfn $"{instanceTime} = {otherTime}: {instanceTime.EqualsExact otherTime}"

let otherTime = DateTimeOffset(instanceTime.DateTime, TimeSpan.FromHours(instanceTime.Offset.Hours + 1 |> float))
printfn $"{instanceTime} = {otherTime}: {instanceTime.EqualsExact otherTime}"

let otherTime = DateTimeOffset(instanceTime.DateTime + TimeSpan.FromHours 1, TimeSpan.FromHours(instanceTime.Offset.Hours + 1 |> float))
printfn $"{instanceTime} = {otherTime}: {instanceTime.EqualsExact otherTime}"

// The example produces the following output:
//       10/31/2007 12:00:00 AM -07:00 = 10/31/2007 12:00:00 AM -07:00: True
//       10/31/2007 12:00:00 AM -07:00 = 10/31/2007 12:00:00 AM -06:00: False
//       10/31/2007 12:00:00 AM -07:00 = 10/31/2007 1:00:00 AM -06:00: False

Dim instanceTime As New DateTimeOffset(#10/31/2007 12:00AM#, _
                                       DateTimeOffset.Now.Offset)

Dim otherTime As DateTimeOffset = instanceTime
Console.WriteLine("{0} = {1}: {2}", _
                  instanceTime, otherTime, _
                  instanceTime.EqualsExact(otherTime))
                  
otherTime = New DateTimeOffset(instanceTime.DateTime, _
                               TimeSpan.FromHours(instanceTime.Offset.Hours + 1))
Console.WriteLine("{0} = {1}: {2}", _
                  instanceTime, otherTime, _
                  instanceTime.EqualsExact(otherTime))
                  
otherTime = New DateTimeOffset(instanceTime.DateTime + TimeSpan.FromHours(1), _
                                TimeSpan.FromHours(instanceTime.Offset.Hours + 1))
Console.WriteLine("{0} = {1}: {2}", _
                  instanceTime, otherTime, _
                  instanceTime.EqualsExact(otherTime))
' The example produces the following output:
'       10/31/2007 12:00:00 AM -07:00 = 10/31/2007 12:00:00 AM -07:00: True
'       10/31/2007 12:00:00 AM -07:00 = 10/31/2007 12:00:00 AM -06:00: False
'       10/31/2007 12:00:00 AM -07:00 = 10/31/2007 1:00:00 AM -06:00: False

注解

由于多个时区共享单个偏移量，因此返回值 true 不保证当前和 other 对象表示同一时区中的时间。

EqualsExact与该方法不同，该方法的Equals重载仅确定两DateTimeOffset个值是否表示单个时间点。 它们不指示两个值具有相同的日期和时间以及相同的偏移量。

另请参阅

• Equals