HttpRequest.ApplicationPath Property

Reference

Definition

Namespace:: System.Web

Assembly:: System.Web.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Gets the ASP.NET application's virtual application root path on the server.

public:
 property System::String ^ ApplicationPath { System::String ^ get(); };

public string ApplicationPath { get; }

member this.ApplicationPath : string

Public ReadOnly Property ApplicationPath As String

Property Value

String

The virtual path of the current application.

Examples

The following example uses the Write method to HTML-encode and then write the value of the ApplicationPath 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));

' 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 the ApplicationPath 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.

<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">

    protected void Page_Load(object sender, EventArgs e)
    {
        Label1.Text = Request.ApplicationPath;
        Image1.ImageUrl = Request.ApplicationPath + "/images/Image1.gif";
        Label2.Text = Image1.ImageUrl;
    }
</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" /><br />

        ImageUrl:<br />
        <asp:Label ID="Label2" runat="server" ForeColor="Brown" />
        <br />
        </div>
    </form>
</body>
</html>

<%@ 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 the ApplicationPath property and /WebSite1/images/Image1.gif will be displayed as the complete path of the image.

Remarks

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.

Applies to

Megosztás a következőn keresztül: