• Articolo

DateTimeOffset.EqualsExact Method

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Determines whether the current DateTimeOffset object represents the same time and has the same offset as a specified DateTimeOffset object.

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

Syntax

'Declaration
Public Function EqualsExact ( _
    other As DateTimeOffset _
) As Boolean

public bool EqualsExact(
    DateTimeOffset other
)

Parameters

Return Value

Type: System.Boolean
true if the current DateTimeOffset object and other have the same date and time value and the same Offset value; otherwise, false.

Remarks

Because multiple time zones share a single offset, a return value of true does not guarantee that the current and the other object represent times in the same time zone.

Unlike the EqualsExact method, the overloads of the Equals method determine only whether two DateTimeOffset values represent a single point in time. They do not indicate that two values have the same date and time as well as the same offset.

Examples

The following example illustrates the use of the EqualsExact method to compare similar DateTimeOffset objects.

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

Dim otherTime As DateTimeOffset = instanceTime
outputBlock.Text += String.Format("{0} = {1}: {2}", _
                  instanceTime, otherTime, _
                  instanceTime.EqualsExact(otherTime)) + vbCrLf

otherTime = New DateTimeOffset(instanceTime.DateTime, _
                               TimeSpan.FromHours(instanceTime.Offset.Hours + 1))
outputBlock.Text += String.Format("{0} = {1}: {2}", _
                  instanceTime, otherTime, _
                  instanceTime.EqualsExact(otherTime)) + vbCrLf

otherTime = New DateTimeOffset(instanceTime.DateTime + TimeSpan.FromHours(1), _
                                TimeSpan.FromHours(instanceTime.Offset.Hours + 1))
outputBlock.Text += String.Format("{0} = {1}: {2}", _
                  instanceTime, otherTime, _
                  instanceTime.EqualsExact(otherTime)) + vbCrLf
' 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       

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

DateTimeOffset otherTime = instanceTime;
outputBlock.Text += String.Format("{0} = {1}: {2}",
                  instanceTime, otherTime,
                  instanceTime.EqualsExact(otherTime)) + "\n";

otherTime = new DateTimeOffset(instanceTime.DateTime,
            TimeSpan.FromHours(instanceTime.Offset.Hours + 1));
outputBlock.Text += String.Format("{0} = {1}: {2}",
                  instanceTime, otherTime,
                  instanceTime.EqualsExact(otherTime)) + "\n";

otherTime = new DateTimeOffset(instanceTime.DateTime + TimeSpan.FromHours(1),
                TimeSpan.FromHours(instanceTime.Offset.Hours + 1));
outputBlock.Text += String.Format("{0} = {1}: {2}",
                  instanceTime, otherTime,
                  instanceTime.EqualsExact(otherTime)) + "\n";
// 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

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.