[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Returns the directory information for the specified path string.
Assembly: mscorlib (in mscorlib.dll)
Public Shared Function GetDirectoryName ( _ path As String _ ) As String
public static string GetDirectoryName( string path )
The path of a file or directory.
A string that contains directory information for path, or nullNothingnullptra null reference (Nothing in Visual Basic) if path denotes a root directory or is nullNothingnullptra null reference (Nothing in Visual Basic). Returns String..::.Empty if path does not contain directory information.
The path parameter contains invalid characters, is empty, or contains only white spaces.
The path parameter is longer than the system-defined maximum length.
In most cases, the string returned by this method consists of all characters in the path up to but not including the last DirectorySeparatorChar or AltDirectorySeparatorChar. If the path consists of a root directory, such as "c:\", null is returned. Note that this method does not support paths using "file:". Because the returned path does not include the DirectorySeparatorChar or AltDirectorySeparatorChar, passing the returned path back into the GetDirectoryName method will result in the truncation of one folder level per subsequent call on the result string.
If you pass an invalid path in GetDirectoryName, the method does not throw an exception. For example, System.IO.Path.GetDirectoryName(@"D:\\temp\\ .") returns D:\temp instead of throwing an exception. GetDirectoryName also does not throw an exception when the source path is longer than the system-defined maximum path length.
Windows Phone OS
Supported in: 8.1, 8.0, 7.1, 7.0