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FileInfo.DirectoryName Property

Gets a string representing the directory's full path.

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

public string DirectoryName { get; }
/** @property */
public String get_DirectoryName ()

public function get DirectoryName () : String

Property Value

A string representing the directory's full path.

Exception typeCondition

SecurityException

The caller does not have the required permission.

ArgumentNullException

a null reference (Nothing in Visual Basic) was passed in for the directory name.

To get the parent directory as a DirectoryInfo object, use the Directory property.

The following table lists examples of other typical or related I/O tasks.

To do this...

See the example in this topic...

Create a text file.

How to: Write Text to a File

Write to a text file.

How to: Write Text to a File

Read from a text file.

How to: Read Text from a File

Retrieve a file extension.

Path.GetExtension

Retrieve only the file name from a path.

Path.GetFileNameWithoutExtension

Change the extension of a file.

Path.ChangeExtension

Retrieve only the directory name from a path.

Path.GetDirectoryName

Sort files in a directory by size.

GetFileSystemInfos

Determine if a file exists.

Exists

Determine if a directory exists.

Exists

The following example retrieves the full path of the specified file.

string   fileName = "C:\\autoexec.bat";
FileInfo fileInfo = new FileInfo(fileName);
if (!fileInfo.Exists) 
{
    return;
}

Console.WriteLine("{0} has a directoryName of {1}", 
    fileName, fileInfo.DirectoryName);
/* This code produces output similar to the following,
 * though actual results may vary by machine:
 * 
 * C:\autoexec.bat has a directoryName of C:\
 */

String fileName = "C:\\autoexec.bat";
FileInfo fileInfo = new FileInfo(fileName);
if (!(fileInfo.get_Exists())) {
    return;
}
Console.WriteLine("{0} has a directoryName of {1}", fileName,
    fileInfo.get_DirectoryName());

var fileName : String = "C:\\autoexec.bat";
var fileInfo : FileInfo = new FileInfo(fileName);
if (!fileInfo.Exists)
    return;

Console.WriteLine("{0} has a directoryName of {1}", 
                  fileName, fileInfo.DirectoryName);

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

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

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

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