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Directory.EnumerateDirectories Method (String)

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

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

Public Shared Function EnumerateDirectories ( _
	path As String _
) As IEnumerable(Of String)


Type: System.String
The directory to search.

Return Value

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


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


path is Nothing.


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


path is a file name.


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.


The caller does not have the required permission.


The caller does not have the required permission.

You can specify relative or absolute path information in 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 returned directory names are prefixed with the value you provided in the path parameter. For example, if you provide a relative path in the path parameter, the returned directory names will contain a relative path.

The EnumerateDirectories and GetDirectories methods differ as follows: When you use EnumerateDirectories, you can start enumerating the collection of names before the whole collection is returned; when you use GetDirectories, 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, EnumerateDirectories 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 top-level directories in a specified path.

Imports System.Collections.Generic
Imports System.IO
Imports System.Linq

Module Module1

    Sub Main()
            Dim dirPath As String = "\\archives\2009\reports"

            ' LINQ query.
            Dim dirs = From folder In _
            For Each folder In dirs
                ' Remove path information from string.
                Console.WriteLine("{0}", _
                        folder.Substring(folder.LastIndexOf("\") + 1))
            Console.WriteLine("{0} directories found.", _

            ' Optionally create a List collection.
            Dim workDirs As List(Of String) = New List(Of String)(dirs)

        Catch UAEx As UnauthorizedAccessException
        Catch PathEx As PathTooLongException
        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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