日期时间。C# 中的 FromFileTime()方法
原文:https://www . geesforgeks . org/datetime-from file time-method-in-c-sharp/
日期时间。FromFileTime(Int64)方法用于将指定的 Windows 文件时间转换为等效的本地时间。
语法:公共静态 DateTime FromFileTime(长 file time)； 这里，需要一个 Windows 文件时间，用刻度表示。
返回值:该方法返回一个对象，该对象表示文件时间参数表示的日期和时间的本地时间等价物。
异常:如果文件时间小于 0 或代表大于最大值的时间，该方法将给出argumentout of range Exception。
以下程序说明了日期时间的使用。FromFileTime(Int64) 方法:
例 1:
// C# program to demonstrate the
// DateTime.FromFileTime(Int64) Method
using System;
using System.Globalization;
class GFG {
// Main Method
public static void Main()
{
try {
// creating object of DateTime
DateTime date1 = new DateTime(2010, 3, 14, 2, 30, 00);
// converting 2500000000000 file
// time represented in ticks
// into DateTime format
// using FromBinary() method
DateTime date2 = DateTime.FromFileTime(2500000000000);
// Display the date1
System.Console.WriteLine("DateTime before "
+ "operation: {0:y} {0:dd}", date1);
// Display the date2
System.Console.WriteLine("\nDateTime after"
+ " operation: {0:y} {0:dd}", date2);
}
catch (ArgumentOutOfRangeException e)
{
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
}
Output:
DateTime before operation: 2010 March 14
DateTime after operation: 1601 January 03
例 2: 为argumentout of range exception
// C# program to demonstrate the
// DateTime.FromFileTime() Method
using System;
using System.Globalization;
class GFG {
// Main Method
public static void Main()
{
try {
// creating object of DateTime
DateTime date1 = new DateTime(2010, 3,
14, 2, 30, 00);
// converting -1 file time
// represented in ticks
// into DateTime format
// using FromBinary() method
DateTime date2 = DateTime.FromFileTime(-1);
// Display the date1
System.Console.WriteLine("DateTime before "
+ "operation: {0:y} {0:dd}",date1);
// Display the date2
System.Console.WriteLine("\nDateTime after"
+ " operation: {0:y} {0:dd}", date2);
}
catch (ArgumentOutOfRangeException e) {
Console.WriteLine("fileTime is less than 0 ");
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
}
Output:
fileTime is less than 0
Exception Thrown: System.ArgumentOutOfRangeException
参考:
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