Gets the ASP.NET application's virtual application root path on the server.
Assembly: System.Web (in System.Web.dll)
Use this property to construct a URL relative to the application root from a page or Web user control that is not in the root directory. This allows pages and shared controls that exist at different levels of a directory structure to use the same code to link to resources at fixed locations in the application.
The following example uses the Write method to HTML-encode and then write the value of the property to a text file. This code example is part of a larger example provided for the HttpRequest class. It assumes the existence of a StreamWriter object named sw.
The following example uses the property to programmatically construct a path to a resource that is in a fixed location in the application. The page that references the resource does not have to be located in the same directory as the resource.
If you run this example in a Web application that is named WebSite1, /WebSite1 will be displayed as the value of the property and /WebSite1/images/Image1.gif will be displayed as the complete path of the image.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.