C＃中的DateTimeOffset.Compare()方法

DateTimeOffset.Compare(DateTimeOffset，DateTimeOffset)方法用于比较两个DateTimeOffset对象，并显示第一个是早于第二个，等于第二个还是晚于第二个。

Syntax: public static int Compare (DateTimeOffset first, DateTimeOffset second);

Parameters:
first: It is the first object to compare.
second: It is the second object to compare.

Return Value: This method returns a signed integer that indicates whether the value of the first parameter is earlier than, later than or the same time as the value of the second parameter.

• Less than zero: Means first is earlier than second.
• Zero: Means first is equal to second.
• Greater than zero: Means first is later than second.

下面的程序说明了DateTimeOffset.Compare(DateTimeOffset，DateTimeOffset)方法的使用：

范例1：

// C# program to demonstrate the
// DateTimeOffset.Compare(DateTimeOffset, 
// DateTimeOffset) Method
using System;
using System.Globalization;
  
class GFG {
  
    // Main Method
    public static void Main()
    {
        // creating object of  DateTimeOffset
        DateTimeOffset offset1 = new DateTimeOffset(2007,
                 6, 1, 7, 55, 0, new TimeSpan(-5, 0, 0));
  
        // creating object of  DateTimeOffset
        DateTimeOffset offset2 = new DateTimeOffset(2006,
                 6, 1, 7, 55, 0, new TimeSpan(-5, 0, 0));
  
        // comparing two offset1 and offset2
        // instance using Compare() method
        int value = DateTimeOffset.Compare(offset1, offset2);
  
        if (value > 0)
        {
            Console.Write("offset1 is later than offset2 ");
        }
        else if (value < 0) 
        {
            Console.Write("offset1 is earlier than offset2");
        }
        else
        {
            Console.Write("offset1 is equal to offset2");
        }
    }
}

输出：

offset1 is later than offset2

示例2：对于ArgumentOutOfRangeException

// C# program to demonstrate the
// DateTimeOffset.Compare(DateTimeOffset,
// DateTimeOffset) Method
using System;
using System.Globalization;
  
class GFG {
  
    // Main Method
    public static void Main()
    {
        // creating object of  DateTimeOffset
        DateTimeOffset offset1 = new DateTimeOffset(2006,
                 6, 1, 7, 55, 0, new TimeSpan(-5, 0, 0));
  
        // creating object of  DateTimeOffset
        DateTimeOffset offset2 = new DateTimeOffset(2006,
                 6, 1, 7, 55, 0, new TimeSpan(-5, 0, 0));
  
        // comparing two offset1 and offset2
        // instance using Compare() method
        int value = DateTimeOffset.Compare(offset1, offset2);
  
        if (value > 0) 
        {
            Console.Write("offset1 is later than offset2 ");
        }
        else if (value < 0)
        {
            Console.Write("offset1 is earlier than offset2");
        }
        else 
        {
            Console.Write("offset1 is equal to offset2");
        }
    }
}

输出：

offset1 is equal to offset2

参考：

• https://docs.microsoft.com/zh-cn/dotnet/api/system.datetimeoffset.compare?view=netframework-4.7.2