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.
' Write request information to the file with HTML encoding. sw.WriteLine(Server.HtmlEncode(DateTime.Now.ToString())) sw.WriteLine(Server.HtmlEncode(Request.CurrentExecutionFilePath)) sw.WriteLine(Server.HtmlEncode(Request.ApplicationPath)) sw.WriteLine(Server.HtmlEncode(Request.FilePath)) sw.WriteLine(Server.HtmlEncode(Request.Path))
The following example uses theproperty 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.
<%@ Page Language="VB" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <script runat="server"> Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Label1.Text = Request.ApplicationPath Image1.ImageUrl = Request.ApplicationPath + "/images/Image1.gif" Label2.Text = Image1.ImageUrl End Sub </script> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server"> <title>HttpRequest.ApplicationPath Example</title> </head> <body> <form id="form1" runat="server"> <div> ApplicationPath:<br /> <asp:Label ID="Label1" runat="server" ForeColor="Brown" /><br /> <asp:Image ID="Image1" runat="server" /> ImageUrl:<br /> <asp:Label ID="Label2" runat="server" ForeColor="Brown" /> <br /> </div> </form> </body> </html>
If you run this example in a Web application that is named WebSite1, /WebSite1 will be displayed as the value of theproperty and /WebSite1/images/Image1.gif will be displayed as the complete path of the image.
Available since 1.1