C＃中的TimeSpan.FromHours()方法

此方法用于获取表示指定小时数的TimeSpan，精确到最接近的毫秒。

Syntax: public static TimeSpan FromHours (double value);

Parameter:
value: This parameter specifies the number of hours, accurate to the nearest millisecond.

Return Value: It returns a new TimeSpan object that represents the value.

例外情况：

• OverflowException ：当给定的double值小于最小可能值或大于最大可能值，或者该值是PositiveInfinity或NegativeInfinity时，将发生OverflowException。
• ArgumentException：如果该值等于NaN。

下面的程序说明了TimeSpan.FromHours(Double)方法的用法：

程序1：

// C# program to demonstrate the
// TimeSpan.FromDays(Double) Method
using System;
  
class GFG {
  
    // Main Method
    public static void Main()
    {
        try {
  
            TimeSpan interval = TimeSpan.FromHours(12.3459);
            Console.WriteLine("The Timespan is : {0}",
                                            interval);
        }
  
        catch (OverflowException e) {
            Console.Write("Exception Thrown: ");
            Console.Write("{0}", e.GetType(), e.Message);
        }
    }
}

输出：

The Timespan is : 12:20:45.2400000

程序2：对于溢出异常

// C# program to demonstrate the
// TimeSpan.FromDays(Double) Method
using System;
  
class GFG {
  
    // Main Method
    public static void Main()
    {
        try {
  
            TimeSpan interval = 
               TimeSpan.FromHours(Double.NegativeInfinity);
  
            Console.WriteLine("The Timespan is : {0}",
                                            interval);
        }
  
        catch (OverflowException e)
       {
            Console.Write("Exception Thrown: ");
            Console.Write("{0}", e.GetType(), e.Message);
        }
    }
}

输出：

Exception Thrown: System.OverflowException

参考：

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