DirectoryExists Method

VirtualPathProvider.DirectoryExists Method

Gets a value that indicates whether a directory exists in the virtual file system.

Namespace: System.Web.Hosting
Assembly: System.Web (in system.web.dll)

Public Overridable Function DirectoryExists ( _
	virtualDir As String _
) As Boolean
Dim instance As VirtualPathProvider
Dim virtualDir As String
Dim returnValue As Boolean

returnValue = instance.DirectoryExists(virtualDir)
public boolean DirectoryExists (
	String virtualDir
public function DirectoryExists (
	virtualDir : String
) : boolean
Not applicable.



The path to the virtual directory.

Return Value

true if the directory exists in the virtual file system; otherwise, false.

Override the DirectoryExists method to indicate to the compilation system that the resource represented by virtualDir exists in the virtual file system provided by this VirtualPathProvider instance.

If your custom VirtualPathProvider class does not support directories, the DirectoryExists method should return false.


If your virtual file system will contain themes for the Web site (by creating a virtual App_Themes directory), your custom VirtualPathProvider class must support directories.

The following code example is an implementation of the DirectoryExists method in a custom VirtualPathProvider class. For the full code required to run the example, see the Example section of the VirtualPathProvider class overview topic.

Public Overrides Function DirectoryExists(ByVal virtualDir As String) As Boolean
  If (IsPathVirtual(virtualDir)) Then
    Dim dir As SampleVirtualDirectory
    dir = CType(GetDirectory(virtualDir), SampleVirtualDirectory)
    Return dir.exists
    Return Previous.DirectoryExists(virtualDir)
  End If
End Function

Windows 98, Windows Server 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0

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