C# DateTime.IsDaylightSavingTime()用法及代码示例

此方法用于指示DateTime的实例是否在当前时区的夏时制时间范围内。

用法： public bool IsDaylightSavingTime ();

返回值：如果Kind属性的值为Local或Unspecified，并且此DateTime实例的值在本地时区的夏令时范围内，则此方法返回；如果Kind为Utc，则返回false。

以下示例程序旨在说明DateTime.IsDaylightSavingTime()方法的使用：

示例1:

// C# program to demonstrate the 
// DateTime.IsDaylightSavingTime() 
// Method 
using System; 
using System.Globalization; 
  
class GFG { 
  
    // Main Method 
    public static void Main() 
    { 
  
        // creating object of DateTime 
        DateTime date = new DateTime(2010, 1, 
                                1, 4, 0, 15); 
  
        // getting Typecode of date 
        // using IsDaylightSavingTime() method; 
        bool value = date.IsDaylightSavingTime(); 
  
        // checking the condition 
        if (value) 
            Console.WriteLine("Instance of DateTime is within the"
                               + " daylight saving time range for"+ 
                                        " the current time zone."); 
  
        else
            Console.WriteLine("Instance of DateTime is not within the"
                              + " daylight saving time range for the "+ 
                                                  "current time zone."); 
    } 
}

输出：

Instance of DateTime is not within the daylight saving time range for the current time zone.

示例2:

// C# program to demonstrate the 
// DateTime.IsDaylightSavingTime() 
// Method 
using System; 
using System.Globalization; 
  
class GFG { 
  
    // Main Method 
    public static void Main() 
    { 
  
        // creating object of DateTime 
        DateTime date = new DateTime(1970, 1, 
                                 1, 4, 0, 15); 
  
        // getting Typecode of date 
        // using IsDaylightSavingTime() method; 
        bool value = date.IsDaylightSavingTime(); 
  
        // checking the condition 
        if (value) 
            Console.WriteLine("Instance of DateTime is within the"
                              + " daylight saving time range for "+ 
                                         "the current time zone."); 
  
        else
            Console.WriteLine("Instance of DateTime is not within the"
                              + " daylight saving time range for the "+ 
                                                 "current time zone."); 
    } 
}

输出：

Instance of DateTime is not within the daylight saving time range for the current time zone.

参考：

https://docs.microsoft.com/en-us/dotnet/api/system.datetime.isdaylightsavingtime?view=netframework-4.7.2

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注：本文由纯净天空筛选整理自RohitPrasad3大神的英文原创作品 DateTime.IsDaylightSavingTime() Method in C#。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。