HttpRequest.AppRelativeCurrentExecutionFilePath Propriedade

Definição

Espaço de Nomes:
System.Web
Assemblagem:
System.Web.dll

Obtém o caminho virtual da raiz da aplicação e torna-o relativo usando a notação tilde (~) para a raiz da aplicação (como em "~/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 Propriedade

String

O caminho virtual da raiz da aplicação para o pedido atual.

Exemplos

O exemplo seguinte usa a AppRelativeCurrentExecutionFilePath propriedade para definir a URL de um Image controlo para uma imagem no mesmo diretório da página. Execute esta página em diferentes níveis de uma estrutura de diretórios para ver os valores resultantes AppRelativeCurrentExecutionFilePath das propriedades.

<%@ 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>

O exemplo seguinte utiliza a AppRelativeCurrentExecutionFilePath propriedade para definir programaticamente o caminho para um recurso, com base no caminho atual da 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>

Observações

Use esta propriedade para fornecer informações de URL que se mantenham inalteradas mesmo que a aplicação mude de localização. Isto permite que o mesmo código de mapeamento de URLs seja usado num ambiente de teste e no ambiente de implementação final, ou que seja usado por cópias de aplicações Web em domínios diferentes.

Aplica-se a