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Directory.EnumerateFiles Method (String)

Returns an enumerable collection of file names in a specified path.

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

'Declaration
Public Shared Function EnumerateFiles ( _
	path As String _
) As IEnumerable(Of String)

Parameters

path
Type: System.String
The directory to search.

Return Value

Type: System.Collections.Generic.IEnumerable(Of String)
An enumerable collection of file names in the directory specified by path.

ExceptionCondition
ArgumentException

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

ArgumentNullException

path is Nothing.

DirectoryNotFoundException

path is invalid, such as referring to an unmapped drive.

IOException

path is a file name.

PathTooLongException

The specified path, file name, or combined 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.

SecurityException

The caller does not have the required permission.

UnauthorizedAccessException

The caller does not have the required permission.

You can specify relative path information with the path parameter. Relative path information is interpreted as relative to the current working directory, which you can determine by using the GetCurrentDirectory method.

The EnumerateFiles and GetFiles methods differ as follows: When you use EnumerateFiles, you can start enumerating the collection of names before the whole collection is returned; when you use GetFiles, you must wait for the whole array of names to be returned before you can access the array. Therefore, when you are working with many files and directories, EnumerateFiles can be more efficient.

The returned collection is not cached; each call to the GetEnumerator on the collection will start a new enumeration.

The following example enumerates the files in the specified directory, reads each line of the file, and displays the line if it contains the string "Europe".


Imports System.IO
Imports System.Linq
Module Module1

    Sub Main()
    	Try
			' LINQ query for all files containing the word 'Europe'.
			Dim files = From file In _
				Directory.EnumerateFiles("\\archives1\library\")
				Where file.ToLower().Contains("europe")

			' Show results.
			For Each file In files
				Console.WriteLine("{0}", file)
			Next
			Console.WriteLine("{0} files found.", _
					files.Count.ToString())
		Catch UAEx As UnauthorizedAccessException
			Console.WriteLine(UAEx.Message)
		Catch PathEx As PathTooLongException
			Console.WriteLine(PathEx.Message)
        End Try                
    End Sub

End Module


.NET Framework

Supported in: 4

.NET Framework Client Profile

Supported in: 4

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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