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HttpResponse.AddCacheDependency(CacheDependency[]) Metode

  • Referensi

Definisi

Ruang nama:
System.Web
Rakitan:
System.Web.dll

Mengaitkan sekumpulan dependensi cache dengan respons untuk memfasilitasi pembatalan respons jika disimpan dalam cache output dan dependensi yang ditentukan berubah.

public:
 void AddCacheDependency(... cli::array <System::Web::Caching::CacheDependency ^> ^ dependencies);
public void AddCacheDependency (params System.Web.Caching.CacheDependency[] dependencies);
member this.AddCacheDependency : System.Web.Caching.CacheDependency[] -> unit
Public Sub AddCacheDependency (ParamArray dependencies As CacheDependency())

Parameter

dependencies
CacheDependency[]

File, kunci cache, atau CacheDependency untuk ditambahkan ke daftar dependensi aplikasi.

Pengecualian

ArgumentNullException

Parameternya dependencies adalah null.

InvalidOperationException

Metode ini disebut terlambat dalam alur pemrosesan cache, setelah respons cache sudah dibuat.

Contoh

Contoh berikut menunjukkan cara membuat dependensi cache dengan menggunakan AddCacheDependency metode dan CacheDependency objek .

<%@ Page Language="C#" %>
<%@ outputcache duration="30" varybyparam="none" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="Server">
    private void Page_Load(object sender, System.EventArgs e)
    {
        // Create a Cache Dependency 
        // using a CacheDependency object.
        CacheDependency authorsDependency = new CacheDependency("authors.xml");


        // Make the page invalid if either of the
        // cached items change or expire.        
        Response.AddCacheDependency(authorsDependency);

        // Display the current time for cache reference
        lblOutputCacheMsg.Text = DateTime.Now.ToString();
    }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
    <title>Cache Dependencies</title> 
</head>
<body>
    <form id="Form1" method="post" runat="server">
        <table>
            <tbody>
                <tr>
                    <td style="WIDTH: 118px">
                        The page was generated at:</td>
                    <td>
                        <asp:Label id="lblOutputCacheMsg" runat="server"></asp:Label>
                    </td>
                </tr>
            </tbody>
        </table>
    </form>
</body>
</html>

<%@ Page Language="VB" %>
<%@ outputcache duration="30" varybyparam="none" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="Server">
    Sub Page_Load()
        ' Create a Cache Dependency 
        ' using a CacheDependency object.
        Dim authorsDependency("authors.xml") As CacheDependency

        ' Make the page invalid if either of the
        ' cached items change or expire.        
        Response.AddCacheDependency(authorsDependency)

        ' Display the current time for cache reference
        lblOutputCacheMsg.Text = DateTime.Now.ToString()
        
        
    End Sub
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
    <title>Cache Dependencies</title> 
</head>
<body>
    <form id="Form1" method="post" runat="server">
        <table>
            <tbody>
                <tr>
                    <td style="WIDTH: 118px">
                        The page was generated at:</td>
                    <td>
                        <asp:Label id="lblOutputCacheMsg" runat="server"></asp:Label>
                    </td>
                </tr>
            </tbody>
        </table>
    </form>
</body>
</html>

Keterangan

Metode ini AddCacheDependency memungkinkan dependensi dibuat antara respons yang di-cache dan CacheDependency objek.

Berlaku untuk

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