File.GetLastWriteTime() Method in C# with Examples
File.GetLastWriteTime(String) is an inbuilt File class method which is used to return the date and time the specified file or directory was last written to.
Syntax:
public static DateTime GetLastWriteTime (string path);
Parameter: This function accepts a parameter which is illustrated below:
- path: This is the specified file path.
Exceptions:
- UnauthorizedAccessException: The caller does not have the required permission.
- ArgumentException: The path is a zero-length string, contains only white space, or one or more invalid characters as defined by InvalidPathChars.
- ArgumentNullException: The path is null.
- PathTooLongException: The given path, file name, or both exceed the system-defined maximum length.
- NotSupportedException: The path is in an invalid format.
Return Value: Returns the date and time the specified file or directory was last written to.
Below are the programs to illustrate the File.GetLastWriteTime(String) method.
Program 1: Before running the below code, a file file.txt is created with some contents shown below:
C#
// C# program to illustrate the usage // of File.GetLastWriteTime(String) method // Using System and System.IO namespaces using System; using System.IO; class GFG { public static void Main() { // Specifying a file string myfile = @"file.txt" ; // Calling GetLastWriteTime() function DateTime dt = File.GetLastWriteTime(myfile); // Getting the last write time Console.WriteLine( "The last write time for this file was {0}." , dt); } } |
Executing:
The last write time for this file was 4/19/2020 4:43:24 AM.
Program 2: Before running the below code, a file was created shown below:
C#
// C# program to illustrate the usage // of File.GetLastWriteTime(String) method // Using System and System.IO namespaces using System; using System.IO; class GFG { public static void Main() { // Specifying a file string myfile = @"file.txt" ; // Setting the date File.SetLastWriteTime(myfile, new DateTime(2020, 4, 3)); // Calling GetLastWriteTime() function DateTime dt = File.GetLastWriteTime(myfile); // Getting the last write time Console.WriteLine( "The last write time for this file was {0}." , dt); } } |
Executing:
The last write time for this file was 4/3/2020 12:00:00 AM.