HttpResponse.AddCacheItemDependencies 方法

  • 參考

定義

命名空間:
System.Web
組件:
System.Web.dll

讓快取回應的有效性取決於快取中的其他項目。

多載

AddCacheItemDependencies(ArrayList)

讓快取回應的有效性取決於快取中的其他項目。
AddCacheItemDependencies(String[])

讓快取項目的有效性取決於快取中的另一個項目。

AddCacheItemDependencies(ArrayList)

讓快取回應的有效性取決於快取中的其他項目。

public:
 void AddCacheItemDependencies(System::Collections::ArrayList ^ cacheKeys);
public void AddCacheItemDependencies (System.Collections.ArrayList cacheKeys);
member this.AddCacheItemDependencies : System.Collections.ArrayList -> unit
Public Sub AddCacheItemDependencies (cacheKeys As ArrayList)

參數

cacheKeys
ArrayList

ArrayList，包含目前快取回應所相依的項目索引鍵。

範例

下列範例示範如何使用快取輸出的 ASP.NET 頁面。 頁面的程式代碼會 ArrayList 建立索引鍵的對象，這些索引鍵與儲存在物件中的 Cache 專案相關聯。 接下來，程式代碼會在呼叫 AddCacheItemDependencies 方法時傳遞 ArrayList 做為 參數。 如果變更中指定的 ArrayList 任何檔案，這會使輸出快取的回應無效。

<%@ Page Language="C#" %>
<%@ outputcache duration="30" varybyparam="none" %>
<%@ Import namespace="Samples.AspNet.CS" %>

<!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 an array list that
        // contains the keys for two
        // items stored in the Cache object.
        ArrayList deps = new ArrayList();
        deps.Add("bookData");
        deps.Add("authorData");
    
        // Make the page invalid if either of the
        // cached items change or expire.        
        Response.AddCacheItemDependencies(deps);

        // Populate the DataGrids.
        dgAuthors.DataSource = DataHelper.GetAuthorData();
        dgAuthors.DataBind();

        dgBooks.DataSource = DataHelper.GetBookData();
        dgBooks.DataBind();

        lblOutputCacheMsg.Text = DateTime.Now.ToString();

    }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
    <title>Cache Item Dependencies</title> 
</head>
<body>
    <form id="Form1" method="post" runat="server">
        <table>
            <tbody>
                <tr>
                    <th style="WIDTH: 118px">
                        Authors</th>
                    <td>
                        <asp:DataGrid id="dgAuthors" runat="server"></asp:DataGrid>
                    </td>
                </tr>
                <tr>
                    <th style="WIDTH: 118px">
                        Books</th>
                    <td>
                        <asp:DataGrid id="dgBooks" runat="server"></asp:DataGrid>
                    </td>
                </tr>
                <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" %>
<%@ Import namespace="Samples.AspNet.VB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

    Private Sub Page_Load(sender As Object, e As System.EventArgs)
       ' Create an array list that
       ' contains the keys for two
       ' items stored in the Cache object.
       Dim deps As New ArrayList()
       deps.Add("bookData")
       deps.Add("authorData")
    
       ' Make the page invalid if either of the
       ' cached items change or expire.
       Response.AddCacheItemDependencies(deps)
    
       ' Populate the DataGrids.
       dgAuthors.DataSource = DataHelper.GetAuthorData()
       dgAuthors.DataBind()
    
       dgBooks.DataSource = DataHelper.GetBookData()
       dgBooks.DataBind()
    
       lblOutputCacheMsg.Text = DateTime.Now.ToString()
    End Sub

</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
    <title>Cache Item Dependencies</title> 
</head>
<body>
    <form id="Form1" method="post" runat="server">
        <table>
            <tbody>
                <tr>
                    <th style="WIDTH: 118px">
                        Authors</th>
                    <td>
                        <asp:DataGrid id="dgAuthors" runat="server"></asp:DataGrid>
                    </td>
                </tr>
                <tr>
                    <th style="WIDTH: 118px">
                        Books</th>
                    <td>
                        <asp:DataGrid id="dgBooks" runat="server"></asp:DataGrid>
                    </td>
                </tr>
                <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>

備註

當參數中 cacheKeys 參考的專案從快取中移除時，目前專案的快取回應無效。

另請參閱

適用於

AddCacheItemDependencies(String[])

讓快取項目的有效性取決於快取中的另一個項目。

public:
 void AddCacheItemDependencies(cli::array <System::String ^> ^ cacheKeys);
public void AddCacheItemDependencies (string[] cacheKeys);
member this.AddCacheItemDependencies : string[] -> unit
Public Sub AddCacheItemDependencies (cacheKeys As String())

參數

cacheKeys
String[]

項目索引鍵的陣列，為快取回應所依存。

備註

從快取中移除任何 cacheKeys 時，目前專案的快取回應無效。

另請參閱

適用於