File Path and Identifier Functions

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The functions in this section provide specific file-related information such as a file's name, path, volume, and other Media Center internal information.


Identifies a file's databases.
Description DBLocation()

DBLocation() behaves exactly as FileDBLocation(0), and takes no parameters, returning only a semicolon-separated list of formatted database names.

Examples See FileDBLocation()


Returns a specified host system variable
Description Enviro(System_Variable)

Enviro() will lookup a given system variable and return its full path or contents. Note that the function only requires the variable name, bookended % signs are not necessary.

Examples Enviro(SystemRoot)
Returns the system folder, typically C:\Windows


Returns the drive the system is installed on, typically, C:


Identifies a file's databases.
Description filedblocation(format)

The FileDBLocation() function returns identifiers in the specified format that indicate to which internal database(s) a file belongs. Media Center maintains several internal databases to track a file's disposition. This function is primarily for technical use only, and will have little utility for most users.

Available format values:

0Semicolon-separated list of formatted database names
1Numeric value of OR'd database bit flags

The table below provides common values output from FileDBLocation():

Database nameBit position
Playing Now1
Other (16)5
Other (6)6
Other (4096)12
Category Images18

Argument format is optional (defaults to 0).

Examples filedblocation()

For a file in the Main and Other (4096) databases, the result would be Main; Other (4096).


The result from the same file would be 4096 (bit 0 and bit 12 set).

Additional Examples

Sample expression that uses FileDBLocation() to show a file's databases.


Returns the name of a file's parent.
Description filefolder(filepath, level)

The FileFolder() function returns parent sub-folder name for filepath. The level argument specifies which parent sub-folder name to return, working the filepath from right-to-left (i.e. bottom of the folder tree upwards to the top). A value of 0 specifies a file's immediate parent, 1 its grandparent, etc., up to the root of the filepath. A value of Unassigned will be returned when the specified level exceeds the root of the filepath.

Argument filepath is optional (defaults to [filename]).

Argument level is optional (defaults to 0).

Examples filefolder()

Returns the name of the file's parent folder.

filefolder([filename,0], 0)

Same as the previous example.

filefolder(c:\some\folder\for\a\file.ape, 2)

Returns the great grandparent sub-folder named folder.

filefolder(c:\some\other\folder\a\, 2)

Returns the folder named other. Notice the file name is not required in the filepath. FileFolder() works by looking from the end of the filepath until it finds a backslash \.


Returns a file's unique internal identifier.
Description filekey()

The FileKey() function returns the unique identifier associated with a file. Media Center assigns a unique identifier to each file in the Library. It is useful in expressions when referring to individual files is necessary. Services such as MCWS use this value to reference a file.

Examples filekey()

Returns a integer value, such as 22029495, unique for each file in the Library.


Looks up a file from its filename
Description FileLookup(Filename)

FileLookup() will lookup a file from a given filename, returning its assigned #FileKey

Examples FileLookup([filename])
Returns the filekey of each file run against it.

FileLookup(C:\Track /(Test/))

Returns the filekey of the specified file. Note that when entering the filename directly, any special characters must be escaped otherwise, the expression will break.


Returns a file's name component.
Description filename(filepath, include suffix)

The FileName() function returns the file name part of filepath. Inclusion of the file's suffix depends on the include suffix argument.

0Suppress file suffix
1Include file suffix

Argument filepath is optional (defaults to [filename]).

Argument include suffix is optional (defaults to 1).

Examples filename(C:\Music\File.mp3)

The output is File.mp3.

filename(C:\Music\File 2.wav, 0)

The output does not include the file suffix, and is File 2.


Returns the value contained in the field [filename (name)].


Returns a file's path component.
Description filepath(filepath)

The FilePath() function will return the path portion of the specified file path.

The filepath should be a rooted path. For Windows, this includes the drive letter or leading \\ for UNC paths. For *nix-based systems, this includes the root /. The field [filename (path)] is equivalent to FilePath(), and is generally preferred.

Argument filepath is optional (defaults to [filename]).

Examples filepath(C:\Music\File.mp3)

Returns C:\Music.


Returns the value contained in the field [filename (path)].


Returns a file's volume name component.
Description filevolume(filepath)

The FileVolume() function returns the volume name component of the specified file path. The path should be a rooted path (see the same comment above for FilePath(). For *nix-based systems, the output is empty. The field [volume name] is equivalent to FileVolume(), and is generally preferred.

Argument filepath is optional (defaults to [filename]).

Examples filevolume(C:\Music\File.mp3)

Outputs C:.


Returns the value contained in the field [volume name].