File.GetLastAccessTime Method (String)


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

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

Public Shared Function GetLastAccessTime (
	path As String
) As Date


Type: System.String

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

Return Value

Type: System.DateTime

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

Exception Condition

The caller does not have the required permission.


path is a zero-length string, contains only white space, or contains one or more invalid characters as defined by InvalidPathChars.


path is null.


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.


path is in an invalid format.


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

If the file 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.

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

The following example demonstrates GetLastAccessTime.

Imports System
Imports System.IO
Imports System.Text

Public Class Test
    Public Shared Sub Main()
            Dim path As String = "c:\Temp\MyTest.txt"
            If File.Exists(path) = False Then
            End If
            File.SetLastAccessTime(path, New DateTime(1985, 5, 4))

            ' Get the creation time of a well-known directory.
            Dim dt As DateTime = File.GetLastAccessTime(path)

            Console.WriteLine("The last access time for this file was {0}.", dt)

            ' Update the last access time.
            File.SetLastAccessTime(path, DateTime.Now)
            dt = File.GetLastAccessTime(path)
            Console.WriteLine("The last access time for this file was {0}.", dt)

        Catch e As Exception
            Console.WriteLine("The process failed: {0}", e.ToString())
        End Try
    End Sub
End Class


for reading from the specified file. Associated enumeration: FileIOPermissionAccess.Read

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