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DateTime.FromFileTime() Method in C#
  • Last Updated : 28 Jan, 2019

DateTime.FromFileTime(Int64) Method is used to converts the specified Windows file time to an equivalent local time.

Syntax: public static DateTime FromFileTime (long fileTime);
Here, it takes a Windows file time expressed in ticks.

Return Value: This method returns an object that represents the local time equivalent of the date and time represented by the fileTime parameter.

Exception: This method will give ArgumentOutOfRangeException if the fileTime is less than 0 or represents a time greater than MaxValue.

Below programs illustrate the use of DateTime.FromFileTime(Int64) Method:



Example 1:

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// 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);
        }
    }
}

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Output:

DateTime before operation: 2010 March 14

DateTime after operation: 1601 January 03

Example 2: For ArgumentOutOfRangeException

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// 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);
        }
    }
}

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Output:

fileTime is less than 0 
Exception Thrown: System.ArgumentOutOfRangeException

Reference:

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