HttpRequest.AppRelativeCurrentExecutionFilePath Propiedad
Definición
Importante
Parte de la información hace referencia a la versión preliminar del producto, que puede haberse modificado sustancialmente antes de lanzar la versión definitiva. Microsoft no otorga ninguna garantía, explícita o implícita, con respecto a la información proporcionada aquí.
Obtiene la ruta de acceso virtual de la raíz de la aplicación y la convierte en relativa mediante la tilde (~) para la raíz de la aplicación (como en "~/page.aspx").
public:
property System::String ^ AppRelativeCurrentExecutionFilePath { System::String ^ get(); };
public string AppRelativeCurrentExecutionFilePath { get; }
member this.AppRelativeCurrentExecutionFilePath : string
Public ReadOnly Property AppRelativeCurrentExecutionFilePath As String
Valor de propiedad
Ruta de acceso virtual de la raíz de la aplicación para la solicitud actual.
Ejemplos
En el ejemplo siguiente se usa la AppRelativeCurrentExecutionFilePath propiedad para establecer la dirección URL de un Image control en una imagen en el mismo directorio que la página. Ejecute esta página en distintos niveles de una estructura de directorios para ver los valores de propiedad resultantes AppRelativeCurrentExecutionFilePath .
<%@ Page Language="C#"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<script runat="server">
protected void Page_Load(object sender, EventArgs e)
{
// Get an image that is in the same directory as the currently executing control.
Image1.ImageUrl =
VirtualPathUtility.GetDirectory(Request.AppRelativeCurrentExecutionFilePath)
+ "image1.jpg";
Label1.Text = "App-relative Image URL = " + Image1.ImageUrl;
}
</script>
<head id="Head1" runat="server">
<title>HttpRequest AppRelativeCurrentExecutionFilePath</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Image ID="Image1" runat="server" /><br />
<asp:Label ID="Label1" runat="server" />
</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">
<html xmlns="http://www.w3.org/1999/xhtml">
<script runat="server">
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
' Get an image that is in the same directory as the currently executing control.
Image1.ImageUrl = VirtualPathUtility.GetDirectory( _
Request.AppRelativeCurrentExecutionFilePath) + "image1.jpg"
Label1.Text = "App-relative Image URL = " + Image1.ImageUrl
End Sub
</script>
<head id="Head1" runat="server">
<title>HttpRequest AppRelativeCurrentExecutionFilePath</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Image ID="Image1" runat="server" /><br />
<asp:Label ID="Label1" runat="server" />
</div>
</form>
</body>
</html>
En el ejemplo siguiente se usa la AppRelativeCurrentExecutionFilePath propiedad para establecer mediante programación la ruta de acceso a un recurso, en función de la ruta de acceso actual de la página.
<%@ 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;
Label3.Text = Request.AppRelativeCurrentExecutionFilePath;
if (VirtualPathUtility.GetDirectory(
Request.AppRelativeCurrentExecutionFilePath).Equals("~/Members/"))
{
Image2.ImageUrl = Request.ApplicationPath +
"/memberimages/Image1.gif";
}
else
{
Image2.ImageUrl = Request.ApplicationPath +
"/guestimages/Image1.gif";
}
Label4.Text = Image2.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>
This is the ApplicationPath from the current page:<br />
<asp:Label ID="Label1" runat="server" ForeColor="Brown" /><br />
Use it to link to resources at fixed locations in the application.<br />
<asp:Image ID="Image1" runat="server" />
<asp:Label ID="Label2" runat="server" ForeColor="Brown" />
<br /><br />
This is the AppRelativeCurrentExecutionFilePath to the current page:<br />
<asp:Label ID="Label3" runat="server" ForeColor="Brown" /><br />
Use it to help programatically construct links to resources based on the location of the current page.<br />
<asp:Image ID="Image2" runat="server" />
<asp:Label ID="Label4" runat="server" ForeColor="Brown" />
</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
Label3.Text = Request.AppRelativeCurrentExecutionFilePath
If (VirtualPathUtility.GetDirectory( _
Request.AppRelativeCurrentExecutionFilePath).Equals( _
"~/Members/")) _
Then
Image2.ImageUrl = Request.ApplicationPath & _
"/memberimages/Image1.gif"
Else
Image2.ImageUrl = Request.ApplicationPath & _
"/guestimages/Image1.gif"
End If
Label4.Text = Image2.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>
This is the ApplicationPath from the current page:<br />
<asp:Label ID="Label1" runat="server" ForeColor="Brown" /><br />
Use it to link to resources at fixed locations in the application.<br />
<asp:Image ID="Image1" runat="server" />
<asp:Label ID="Label2" runat="server" ForeColor="Brown" />
<br /><br />
This is the AppRelativeCurrentExecutionFilePath to the current page:<br />
<asp:Label ID="Label3" runat="server" ForeColor="Brown" /><br />
Use it to help programatically construct links to resources based on the location of the current page.<br />
<asp:Image ID="Image2" runat="server" />
<asp:Label ID="Label4" runat="server" ForeColor="Brown" />
</div>
</form>
</body>
</html>
Comentarios
Use esta propiedad para proporcionar información de dirección URL que permanecerá igual incluso si la aplicación cambia la ubicación. Esto permite usar el mismo código de asignación de direcciones URL en un entorno de prueba y en el entorno de implementación final, o bien usarse mediante copias de aplicaciones web en dominios diferentes.