VirtualPathProvider.DirectoryExists(String) Method

Definition

Namespace:

System.Web.Hosting

Assembly:

System.Web.dll

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

public:
 virtual bool DirectoryExists(System::String ^ virtualDir);

public virtual bool DirectoryExists (string virtualDir);

abstract member DirectoryExists : string -> bool
override this.DirectoryExists : string -> bool

Public Overridable Function DirectoryExists (virtualDir As String) As Boolean

Parameters

virtualDir

String

The path to the virtual directory.

Returns

Boolean

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

Examples

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 override bool DirectoryExists(string virtualDir)
{
  if (IsPathVirtual(virtualDir))
  {
    SampleVirtualDirectory dir = (SampleVirtualDirectory)GetDirectory(virtualDir);
    return dir.Exists;
  }
  else
        {
            return Previous.DirectoryExists(virtualDir);
        }
    }

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
  Else
    Return Previous.DirectoryExists(virtualDir)
  End If
End Function

Remarks

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.

Note

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.