DirectoryInfo.GetFileSystemInfos DirectoryInfo.GetFileSystemInfos DirectoryInfo.GetFileSystemInfos DirectoryInfo.GetFileSystemInfos Method

Definition

Retrieves an array of strongly typed FileSystemInfo objects representing files and subdirectories of the current directory.

Overloads

GetFileSystemInfos() GetFileSystemInfos() GetFileSystemInfos() GetFileSystemInfos()

Returns an array of strongly typed FileSystemInfo entries representing all the files and subdirectories in a directory.

GetFileSystemInfos(String) GetFileSystemInfos(String) GetFileSystemInfos(String) GetFileSystemInfos(String)

Retrieves an array of strongly typed FileSystemInfo objects representing the files and subdirectories that match the specified search criteria.

GetFileSystemInfos(String, EnumerationOptions) GetFileSystemInfos(String, EnumerationOptions) GetFileSystemInfos(String, EnumerationOptions)
GetFileSystemInfos(String, SearchOption) GetFileSystemInfos(String, SearchOption) GetFileSystemInfos(String, SearchOption)

Retrieves an array of FileSystemInfo objects that represent the files and subdirectories matching the specified search criteria.

GetFileSystemInfos() GetFileSystemInfos() GetFileSystemInfos() GetFileSystemInfos()

Returns an array of strongly typed FileSystemInfo entries representing all the files and subdirectories in a directory.

public:
 cli::array <System::IO::FileSystemInfo ^> ^ GetFileSystemInfos();
public System.IO.FileSystemInfo[] GetFileSystemInfos ();
member this.GetFileSystemInfos : unit -> System.IO.FileSystemInfo[]
Public Function GetFileSystemInfos () As FileSystemInfo()
Returns

An array of strongly typed FileSystemInfo entries.

Exceptions

Examples

The following example counts the files and directories under the specified directory.

using System;
using System.IO;

class DirectoryFileCount
{

    static long files = 0;
    static long directories = 0;


    static void Main()
    {
        try
        {
            Console.WriteLine("Enter the path to a directory:");

            string directory = Console.ReadLine();

            // Create a new DirectoryInfo object.
            DirectoryInfo dir = new DirectoryInfo(directory);

            if (!dir.Exists)
            {
                throw new DirectoryNotFoundException("The directory does not exist.");
            }

            // Call the GetFileSystemInfos method.
            FileSystemInfo[] infos = dir.GetFileSystemInfos();

            Console.WriteLine("Working...");

            // Pass the result to the ListDirectoriesAndFiles
            // method defined below.
            ListDirectoriesAndFiles(infos);

            // Display the results to the console. 
            Console.WriteLine("Directories: {0}", directories);
            Console.WriteLine("Files: {0}", files);

        }
        catch (Exception e)
        {
            Console.WriteLine(e.Message);
        }
        finally
        {

            Console.ReadLine();
        }
    }

    static void ListDirectoriesAndFiles(FileSystemInfo[] FSInfo)
    {
        // Check the FSInfo parameter.
        if (FSInfo == null)
        {
            throw new ArgumentNullException("FSInfo");
        }

        // Iterate through each item.
        foreach (FileSystemInfo i in FSInfo)
        {
            // Check to see if this is a DirectoryInfo object.
            if (i is DirectoryInfo)
            {
                // Add one to the directory count.
                directories++;

                // Cast the object to a DirectoryInfo object.
                DirectoryInfo dInfo = (DirectoryInfo)i;

                // Iterate through all sub-directories.
                ListDirectoriesAndFiles(dInfo.GetFileSystemInfos());
            }
            // Check to see if this is a FileInfo object.
            else if (i is FileInfo)
            {
                // Add one to the file count.
                files++;

            }

        }
    }
}
Imports System
Imports System.IO



Module DirectoryFileCount

    Dim files As Long = 0
    Dim directories As Long = 0



    Sub Main()
        Try
            Console.WriteLine("Enter the path to a directory:")

            Dim directory As String = Console.ReadLine()

            ' Create a new DirectoryInfo object.
            Dim dir As New DirectoryInfo(directory)

            If Not dir.Exists Then
                Throw New DirectoryNotFoundException("The directory does not exist.")
            End If

            ' Call the GetFileSystemInfos method.
            Dim infos As FileSystemInfo() = dir.GetFileSystemInfos()

            Console.WriteLine("Working...")

            ' Pass the result to the ListDirectoriesAndFiles
            ' method defined below.
            ListDirectoriesAndFiles(infos)

            ' Display the results to the console. 
            Console.WriteLine("Directories: {0}", directories)
            Console.WriteLine("Files: {0}", files)

        Catch e As Exception
            Console.WriteLine(e.Message)
        Finally

            Console.ReadLine()
        End Try

    End Sub


    Sub ListDirectoriesAndFiles(ByVal FSInfo() As FileSystemInfo)
        ' Check the FSInfo parameter.
        If FSInfo Is Nothing Then
            Throw New ArgumentNullException("FSInfo")
        End If

        ' Iterate through each item.
        Dim i As FileSystemInfo
        For Each i In FSInfo
            ' Check to see if this is a DirectoryInfo object.
            If TypeOf i Is DirectoryInfo Then
                ' Add one to the directory count.
                directories += 1

                ' Cast the object to a DirectoryInfo object.
                Dim dInfo As DirectoryInfo = CType(i, DirectoryInfo)

                ' Iterate through all sub-directories.
                ListDirectoriesAndFiles(dInfo.GetFileSystemInfos())
                ' Check to see if this is a FileInfo object.
            ElseIf TypeOf i Is FileInfo Then
                ' Add one to the file count.
                files += 1
            End If
        Next i

    End Sub
End Module

Remarks

If there are no files or directories in the DirectoryInfo, this method returns an empty array. This method is not recursive.

For subdirectories, the FileSystemInfo objects returned by this method can be cast to the derived class DirectoryInfo. Use the FileAttributes value returned by the FileSystemInfo.Attributes property to determine whether the FileSystemInfo represents a file or a directory.

This method pre-populates the values of the following FileSystemInfo properties:

See Also

GetFileSystemInfos(String) GetFileSystemInfos(String) GetFileSystemInfos(String) GetFileSystemInfos(String)

Retrieves an array of strongly typed FileSystemInfo objects representing the files and subdirectories that match the specified search criteria.

public:
 cli::array <System::IO::FileSystemInfo ^> ^ GetFileSystemInfos(System::String ^ searchPattern);
public System.IO.FileSystemInfo[] GetFileSystemInfos (string searchPattern);
member this.GetFileSystemInfos : string -> System.IO.FileSystemInfo[]
Public Function GetFileSystemInfos (searchPattern As String) As FileSystemInfo()
Parameters
searchPattern
String String String String

The search string to match against the names of directories and files. This parameter can contain a combination of valid literal path and wildcard (* and ?) characters, but it doesn't support regular expressions.

Returns

An array of strongly typed FileSystemInfo objects matching the search criteria.

Exceptions

searchPattern contains one or more invalid characters defined by the GetInvalidPathChars() method.

The specified path is invalid (for example, it is on an unmapped drive).

The caller does not have the required permission.

Examples

The following example counts the files and directories that match the specified search pattern.

using System;
using System.IO;

class DirectoryFileCount
{

    static long files = 0;
    static long directories = 0;


    static void Main()
    {
        try
        {
            Console.WriteLine("Enter the path to a directory:");

            string directory = Console.ReadLine();

            Console.WriteLine("Enter a search string (for example *p*):");

            string searchString = Console.ReadLine();

            // Create a new DirectoryInfo object.
            DirectoryInfo dir = new DirectoryInfo(directory);

            if (!dir.Exists)
            {
                throw new DirectoryNotFoundException("The directory does not exist.");
            }

            // Call the GetFileSystemInfos method.
            FileSystemInfo[] infos = dir.GetFileSystemInfos(searchString);

            Console.WriteLine("Working...");

            // Pass the result to the ListDirectoriesAndFiles
            // method defined below.
            ListDirectoriesAndFiles(infos, searchString);

            // Display the results to the console. 
            Console.WriteLine("Directories: {0}", directories);
            Console.WriteLine("Files: {0}", files);

        }
        catch (Exception e)
        {
            Console.WriteLine(e.Message);
        }
        finally
        {

            Console.ReadLine();
        }
    }

    static void ListDirectoriesAndFiles(FileSystemInfo[] FSInfo, string SearchString)
    {
        // Check the parameters.
        if (FSInfo == null)
        {
            throw new ArgumentNullException("FSInfo");
        }
        if (SearchString == null || SearchString.Length == 0)
        {
            throw new ArgumentNullException("SearchString");
        }

        // Iterate through each item.
        foreach (FileSystemInfo i in FSInfo)
        {
            // Check to see if this is a DirectoryInfo object.
            if (i is DirectoryInfo)
            {
                // Add one to the directory count.
                directories++;

                // Cast the object to a DirectoryInfo object.
                DirectoryInfo dInfo = (DirectoryInfo)i;

                // Iterate through all sub-directories.
                ListDirectoriesAndFiles(dInfo.GetFileSystemInfos(SearchString), SearchString);
            }
            // Check to see if this is a FileInfo object.
            else if (i is FileInfo)
            {
                // Add one to the file count.
                files++;

            }

        }
    }
}
Imports System
Imports System.IO



Module DirectoryFileCount

    Dim files As Long = 0
    Dim directories As Long = 0



    Sub Main()
        Try
            Console.WriteLine("Enter the path to a directory:")

            Dim directory As String = Console.ReadLine()

            Console.WriteLine("Enter a search string (for example *p*):")

            Dim searchString As String = Console.ReadLine()

            ' Create a new DirectoryInfo object.
            Dim dir As New DirectoryInfo(directory)

            If Not dir.Exists Then
                Throw New DirectoryNotFoundException("The directory does not exist.")
            End If

            ' Call the GetFileSystemInfos method.
            Dim infos As FileSystemInfo() = dir.GetFileSystemInfos(searchString)

            Console.WriteLine("Working...")

            ' Pass the result to the ListDirectoriesAndFiles
            ' method defined below.
            ListDirectoriesAndFiles(infos, searchString)

            ' Display the results to the console. 
            Console.WriteLine("Directories: {0}", directories)
            Console.WriteLine("Files: {0}", files)

        Catch e As Exception
            Console.WriteLine(e.Message)
        Finally

            Console.ReadLine()
        End Try

    End Sub


    Sub ListDirectoriesAndFiles(ByVal FSInfo() As FileSystemInfo, ByVal SearchString As String)
        ' Check the parameters.
        If FSInfo Is Nothing Then
            Throw New ArgumentNullException("FSInfo")
        End If
        If SearchString Is Nothing OrElse SearchString.Length = 0 Then
            Throw New ArgumentNullException("SearchString")
        End If

        ' Iterate through each item.
        Dim i As FileSystemInfo
        For Each i In FSInfo
            ' Check to see if this is a DirectoryInfo object.
            If TypeOf i Is DirectoryInfo Then
                ' Add one to the directory count.
                directories += 1

                ' Cast the object to a DirectoryInfo object.
                Dim dInfo As DirectoryInfo = CType(i, DirectoryInfo)

                ' Iterate through all sub-directories.
                ListDirectoriesAndFiles(dInfo.GetFileSystemInfos(SearchString), SearchString)
                ' Check to see if this is a FileInfo object.
            ElseIf TypeOf i Is FileInfo Then
                ' Add one to the file count.
                files += 1
            End If
        Next i

    End Sub
End Module

Remarks

searchPattern can be a combination of literal and wildcard characters, but it doesn't support regular expressions. The following wildcard specifiers are permitted in searchPattern.

Wildcard specifier Matches
* (asterisk) Zero or more characters in that position.
? (question mark) Zero or one character in that position.

Characters other than the wildcard are literal characters. For example, the string "*t" searches for all names in ending with the letter "t". ". The searchPattern string "s*" searches for all names in path beginning with the letter "s".

This method is not recursive.

For subdirectories, the FileSystemInfo objects returned by this method can be cast to the derived class DirectoryInfo. Use the FileAttributes value returned by the FileSystemInfo.Attributes property to determine whether the FileSystemInfo represents a file or a directory.

Wild cards are permitted. For example, the searchPattern string "*t" searches for all directory names in path ending with the letter "t". The searchPattern string "s*" searches for all directory names in path beginning with the letter "s".

The string ".." can only be used in searchPattern if it is specified as a part of a valid directory name, such as in the directory name "a..b". It cannot be used to move up the directory hierarchy. If there are no files or directories, or no files or directories that match the searchPattern string in the DirectoryInfo, this method returns an empty array.

This method pre-populates the values of the following FileSystemInfo properties:

Security

FileIOPermission
for reading from files and directories and for access to the path. Associated enumerations: Read, PathDiscovery

See Also

GetFileSystemInfos(String, EnumerationOptions) GetFileSystemInfos(String, EnumerationOptions) GetFileSystemInfos(String, EnumerationOptions)

public:
 cli::array <System::IO::FileSystemInfo ^> ^ GetFileSystemInfos(System::String ^ searchPattern, System::IO::EnumerationOptions ^ enumerationOptions);
public System.IO.FileSystemInfo[] GetFileSystemInfos (string searchPattern, System.IO.EnumerationOptions enumerationOptions);
member this.GetFileSystemInfos : string * System.IO.EnumerationOptions -> System.IO.FileSystemInfo[]
Parameters
searchPattern
String String String String
Returns

GetFileSystemInfos(String, SearchOption) GetFileSystemInfos(String, SearchOption) GetFileSystemInfos(String, SearchOption)

Retrieves an array of FileSystemInfo objects that represent the files and subdirectories matching the specified search criteria.

public:
 cli::array <System::IO::FileSystemInfo ^> ^ GetFileSystemInfos(System::String ^ searchPattern, System::IO::SearchOption searchOption);
public System.IO.FileSystemInfo[] GetFileSystemInfos (string searchPattern, System.IO.SearchOption searchOption);
member this.GetFileSystemInfos : string * System.IO.SearchOption -> System.IO.FileSystemInfo[]
Parameters
searchPattern
String String String String

The search string to match against the names of directories and filesa. This parameter can contain a combination of valid literal path and wildcard (* and ?) characters, but it doesn't support regular expressions.

searchOption
SearchOption SearchOption SearchOption SearchOption

One of the enumeration values that specifies whether the search operation should include only the current directory or all subdirectories. The default value is TopDirectoryOnly.

Returns

An array of file system entries that match the search criteria.

Exceptions

searchPattern contains one or more invalid characters defined by the GetInvalidPathChars() method.

The specified path is invalid (for example, it is on an unmapped drive).

The caller does not have the required permission.

Remarks

searchPattern can be a combination of literal and wildcard characters, but it doesn't support regular expressions. The following wildcard specifiers are permitted in searchPattern.

Wildcard specifier Matches
* (asterisk) Zero or more characters in that position.
? (question mark) Zero or one character in that position.

Characters other than the wildcard are literal characters. For example, the string "*t" searches for all names in ending with the letter "t". ". The searchPattern string "s*" searches for all names in path beginning with the letter "s".

For subdirectories, the FileSystemInfo objects returned by this method can be cast to the derived class DirectoryInfo. Use the FileAttributes value returned by the FileSystemInfo.Attributes property to determine whether the FileSystemInfo represents a file or a directory.

This method pre-populates the values of the following FileSystemInfo properties:

See Also

Applies to