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DirectoryInfo.GetFileSystemInfos Method

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

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

public FileSystemInfo[] GetFileSystemInfos()

Return Value

Type: System.IO.FileSystemInfo[]
An array of strongly typed FileSystemInfo entries.

ExceptionCondition
DirectoryNotFoundException

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

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:

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++;

            }

        }
    }
}

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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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