DateTimeOffset.GreaterThanOrEqual(DateTimeOffset, DateTimeOffset) 运算符

定义

确定一个指定的 DateTimeOffset 对象是大于还是等于另一个指定的 DateTimeOffset 对象。Determines whether one specified DateTimeOffset object is greater than or equal to a second specified DateTimeOffset object.

public:
 static bool operator >=(DateTimeOffset left, DateTimeOffset right);
public static bool operator >= (DateTimeOffset left, DateTimeOffset right);
static member ( >= ) : DateTimeOffset * DateTimeOffset -> bool
Public Shared Operator >= (left As DateTimeOffset, right As DateTimeOffset) As Boolean

参数

left
DateTimeOffset

要比较的第一个对象。The first object to compare.

right
DateTimeOffset

要比较的第二个对象。The second object to compare.

返回

如果 trueUtcDateTime 值等于或晚于 leftUtcDateTime 值,则为 right;否则为 falsetrue if the UtcDateTime value of left is the same as or later than the UtcDateTime value of right; otherwise, false.

注解

GreaterThan 方法为 DateTimeOffset 对象定义大于或等于运算符的运算。The GreaterThan method defines the operation of the greater than or equal to operator for DateTimeOffset objects. 它可以实现如下所示的代码:It enables code such as the following:

DateTimeOffset date1 = new DateTimeOffset(2007, 6, 3, 14, 45, 0, 
             new TimeSpan(-7, 0, 0));
DateTimeOffset date2 = new DateTimeOffset(2007, 6, 3, 15, 45, 0,
             new TimeSpan(-7, 0, 0));
DateTimeOffset date3 = new DateTimeOffset(date1.DateTime, 
             new TimeSpan(-6, 0, 0));
DateTimeOffset date4 = date1;
Console.WriteLine(date1 >= date2);        // Displays False
Console.WriteLine(date1 >= date3);        // Displays True 
Console.WriteLine(date1 >= date4);        // Displays True 
Dim date1 As New DateTimeOffset(#6/3/2007 2:45PM#, _
             New TimeSpan(-7, 0, 0))
Dim date2 As New DateTimeOffset(#6/3/2007 3:45PM#, _
             New TimeSpan(-7, 0, 0))
Dim date3 As New DateTimeOffset(date1.DateTime, _
             New TimeSpan(-6, 0, 0))
Dim date4 As DateTimeOffset = date1
Console.WriteLine(date1 >= date2)        ' Displays False
Console.WriteLine(date1 >= date3)        ' Displays True
Console.WriteLine(date1 >= date4)        ' Displays True

不支持自定义运算符的语言可以改为调用 Compare 方法。Languages that do not support custom operators can call the Compare method instead. 某些语言还可以直接调用 GreaterThanOrEqual 方法,如下面的示例所示。Some languages can also call the GreaterThanOrEqual method directly, as the following example shows.

Dim date1 As New DateTimeOffset(#6/3/2007 2:45PM#, _
             New TimeSpan(-7, 0, 0))
Dim date2 As New DateTimeOffset(#6/3/2007 3:45PM#, _
             New TimeSpan(-7, 0, 0))
Dim date3 As New DateTimeOffset(date1.DateTime, _
             New TimeSpan(-6, 0, 0))
Dim date4 As DateTimeOffset = date1
Console.WriteLine( _
    DateTimeOffset.op_GreaterThanOrEqual(date1, date2))   ' Displays False
Console.WriteLine( _
    DateTimeOffset.op_GreaterThanOrEqual(date1, date3))   ' Displays True
Console.WriteLine( _
    DateTimeOffset.op_GreaterThanOrEqual(date1, date4))   ' Displays True

计算 leftright 操作数之前,运算符会将这两个值都转换为协调世界时(UTC)。Before evaluating the left and right operands, the operator converts both values to Coordinated Universal Time (UTC). 操作等效于以下内容:The operation is equivalent to the following:

return left.UtcDateTime >= right.UtcDateTime;
Return left.UtcDateTime >= right.UtcDateTime

此运算符的等效方法是 DateTimeOffset.Compare(DateTimeOffset, DateTimeOffset)The equivalent method for this operator is DateTimeOffset.Compare(DateTimeOffset, DateTimeOffset)

适用于