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VirtualPathProvider.FileExists Method

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

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

'Declaration
Public Overridable Function FileExists ( _
	virtualPath As String _
) As Boolean
'Usage
Dim instance As VirtualPathProvider 
Dim virtualPath As String 
Dim returnValue As Boolean 

returnValue = instance.FileExists(virtualPath)

Parameters

virtualPath
Type: System.String

The path to the virtual file.

Return Value

Type: System.Boolean
true if the file exists in the virtual file system; otherwise, false.

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

The following code example is an implementation of the FileExists 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 FileExists(ByVal virtualPath As String) As Boolean 
  If (IsPathVirtual(virtualPath)) Then 
    Dim file As SampleVirtualFile
    file = CType(GetFile(virtualPath), SampleVirtualFile)
    Return file.Exists
  Else 
    Return Previous.FileExists(virtualPath)
  End If 
End Function

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0
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