FileInfo.DirectoryName Property

Definition

Namespace:

System.IO

Assemblies:

netstandard.dll, System.Runtime.dll

Source:

FileInfo.cs

Gets a string representing the directory's full path.

C#

public string? DirectoryName { get; }

Property Value

String

A string representing the directory's full path.

Exceptions

ArgumentNullException

null was passed in for the directory name.

PathTooLongException

The fully qualified path name exceeds the system-defined maximum length.

SecurityException

The caller does not have the required permission.

Examples

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

C#

string   fileName = @"C:\TMP\log.txt";
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:\TMP\log.txt has a directory name of C:\TMP
 */

Remarks

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

When first called, FileInfo calls Refresh and caches information about the file. On subsequent calls, you must call Refresh to get the latest copy of the information.

Applies to

See also

• File and Stream I/O
• How to: Read Text from a File
• How to: Write Text to a File