System.FileExtension
Identifies the file extension of the file-based item, including the leading period. This property is derived from System.FileName. If System.FileName either does not have a file extension or is VT_EMPTY, the value for this property should be VT_EMPTY.
To obtain the type of any item (including an item that is not a file), use System.ItemType.
Windows 10, version 1703, Windows 10, version 1607, Windows 10, version 1511, Windows 10, version 1507, Windows 8.1, Windows 8, Windows 7, Windows Vista
propertyDescription
name = System.FileExtension
shellPKey = PKEY_FileExtension
formatID = E4F10A3C-49E6-405D-8288-A23BD4EEAA6C
propID = 100
SearchInfo
InInvertedIndex = true
IsColumn = true
typeInfo
type = String
IsInnate = true
Remarks
PKEY values are defined in Propkey.h.
If System.FileName is VT_EMPTY, this property should also be empty. Otherwise, this property should be derived appropriately by the data source from System.FileName. If System.FileName does not include a file extension, System.FileExtension should be VT_EMPTY. To obtain the type of any item (including an item that is not a file), use System.ItemType.
Path and file extension property examples.
| Path | File Extension |
|---|---|
| c:\files\personal\hello.txt | .txt |
| \\server\share\mydir\news.doc | .doc |
| \\server\share\numbers.xls | .xls |
| \\server\share\folder | VT_EMPTY |
| c:\Stuff\MyFolder | VT_EMPTY |
| [desktop] | VT_EMPTY |
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