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Directory.GetLastAccessTime Method (String)

 

Returns the date and time the specified file or directory was last accessed.

Namespace:   System.IO
Assembly:  mscorlib (in mscorlib.dll)

public static DateTime GetLastAccessTime(
	string path
)

Parameters

path
Type: System.String

The file or directory for which to obtain access date and time information.

Return Value

Type: System.DateTime

A structure that is set to the date and time the specified file or directory was last accessed. This value is expressed in local time.

Exception Condition
UnauthorizedAccessException

The caller does not have the required permission.

ArgumentException

path is a zero-length string, contains only white space, or contains one or more invalid characters. You can query for invalid characters with the GetInvalidPathChars method.

ArgumentNullException

path is null.

PathTooLongException

The specified path, file name, or both exceed the system-defined maximum length. For example, on Windows-based platforms, paths must be less than 248 characters and file names must be less than 260 characters.

NotSupportedException

The path parameter is in an invalid format.

System_CAPS_noteNote

This method may return an inaccurate value, because it uses native functions whose values may not be continuously updated by the operating system.

This method is identical to File.GetLastAccessTime.

If the directory described in the path parameter does not exist, this method returns 12:00 midnight, January 1, 1601 A.D. (C.E.) Coordinated Universal Time (UTC), adjusted to local time.

The path parameter is permitted to specify relative or absolute path information. Relative path information is interpreted as relative to the current working directory. To obtain the current working directory, see GetCurrentDirectory.

The path parameter is not case-sensitive.

For a list of common I/O tasks, see Common I/O Tasks.

The following example demonstrates how to use GetLastAccessTime.

using System;
using System.IO;

class Test 
{
    public static void Main() 
    {
        try 
        {
            string path = @"c:\MyDir";
            if (!Directory.Exists(path)) 
            {
                Directory.CreateDirectory(path);
            }
            Directory.SetLastAccessTime(path, new DateTime(1985,5,4));

            // Get the creation time of a well-known directory.
            DateTime dt = Directory.GetLastAccessTime(path);
            Console.WriteLine("The last access time for this directory was {0}", dt);

            // Update the last access time.
            Directory.SetLastAccessTime(path, DateTime.Now);
            dt = Directory.GetLastAccessTime(path);
            Console.WriteLine("The last access time for this directory was {0}", dt);
        } 

        catch (Exception e) 
        {
            Console.WriteLine("The process failed: {0}", e.ToString());
        }
    }
}

FileIOPermission

for reading the specified file or directory. Associated enumeration: FileIOPermissionAccess.Read

Universal Windows Platform
Available since 10
.NET Framework
Available since 1.1
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
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