C＃中的DateTime.ToUniversalTime()方法

此方法用于将当前DateTime对象的值转换为协调世界时(UTC)。

Syntax: public DateTime ToUniversalTime ();

Return Value: This method returns an object whose Kind property is Utc, and whose value is the UTC equivalent to the value of the current DateTime object, or MaxValue if the converted value is too large to be represented by a DateTime object, or MinValue if the converted value is too small to be represented by a DateTime object.

下面的程序说明了DateTime.ToUniversalTime()方法的用法：

范例1：

// C# program to demonstrate the
// DateTime.ToUniversalTime()
// Method
using System;
  
class GFG {
  
    // Main Method
    public static void Main()
    {
  
        // creating object of DateTime
        DateTime date = new DateTime(2010, 1,
                                1, 4, 0, 15);
  
        // getting UTC from DateTime
        // using ToUniversalTime() method;
        DateTime value = date.ToUniversalTime();
  
        // Display the ShortTime
        Console.WriteLine("UTC is {0}", value);
    }
}

输出：

UTC is 01/01/2010 04:00:15

范例2：

// C# program to demonstrate the
// DateTime.ToUniversalTime()
// Method
using System;
  
class GFG {
  
    // Main Method
    public static void Main()
    {
        // calling check() method
        check(new DateTime(2010, 1,
                     3, 4, 0, 15));
  
        check(new DateTime(2010, 1,
                     5, 4, 0, 15));
    }
  
    public static void check(DateTime date)
    {
  
        // getting UTC from DateTime
        // using ToUniversalTime() method;
        DateTime value = date.ToUniversalTime();
  
        // Display the ShortTime
        Console.WriteLine("UTC of {0} is {1}",
                                 date, value);
    }
}

输出：

UTC of 01/03/2010 04:00:15 is 01/03/2010 04:00:15
UTC of 01/05/2010 04:00:15 is 01/05/2010 04:00:15

参考：

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