Page.Cache 属性
定义
重要
一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。 对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。
获取与该页驻留的应用程序关联的 Cache 对象。
public:
property System::Web::Caching::Cache ^ Cache { System::Web::Caching::Cache ^ get(); };[System.ComponentModel.Browsable(false)]
public System.Web.Caching.Cache Cache { get; }[<System.ComponentModel.Browsable(false)>]
member this.Cache : System.Web.Caching.CachePublic ReadOnly Property Cache As Cache属性值
与该页的应用程序关联的 Cache。
- 属性
例外
未创建 Cache 的实例。
示例
下面的代码示例使用Page.Cache属性将两个整数System.Web.Caching.Cache的总和插入对象中。 然后，它使用 Cache.Get 该方法检索值，并将其 Label 写入 Web 服务器控件。
// This is a simple page that demonstrates how to place a value
// in the cache from a page, and one way to retrieve the value.
// Declare two constants, myInt1 and myInt2 and set their values
// and declare a string variable, myValue.
const int myInt1 = 35;
const int myInt2 = 77;
string myValue;
// When the page is loaded, the sum of the constants
// is placed in the cache and assigned a key, key1.
void Page_Load(Object sender, EventArgs arg) {
Cache["key1"] = myInt1 + myInt2;
}
// When a user clicks a button, the sum associated
// with key1 is retrieved from the Cache using the
// Cache.Get method. It is converted to a string
// and displayed in a Label Web server control.
void CacheBtn_Click(object sender, EventArgs e) {
if (Cache["key1"] == null) {
myLabel.Text = "That object is not cached.";
}
else {
myValue = Cache.Get("key1").ToString();
myLabel.Text = myValue;
}
}
' This is a simple page that demonstrates how to place a value
' in the cache from a page, and one way to retrieve the value.
' Declare two constants, myInt1 and myInt2 and set their values
' and declare a string variable, myValue.
Const myInt1 As Integer = 35
Const myInt2 As Integer = 77
Dim myValue As String
' When the page is loaded, the sum of the constants
' is placed in the cache and assigned a key, key1.
Sub Page_Load(sender As [Object], arg As EventArgs)
Cache("key1")= myInt1 + myInt2
End Sub 'Page_Load
' When a user clicks a button, the sum associated
' with key1 is retrieved from the Cache using the
' Cache.Get method. It is converted to a string
' and displayed in a Label Web server control.
Sub CacheBtn_Click(sender As Object, e As EventArgs)
If Cache("key1") Is Nothing Then
myLabel.Text = "That object is not cached."
Else
myValue = Cache.Get("key1").ToString()
myLabel.Text = myValue
End If
End Sub 'CacheBtn_Click
注解
应用程序 Cache 的对象允许在后续请求中存储和检索任意数据。 缓存不专门与页面或用户会话关联。 它主要用于增强应用程序性能。 有关详细信息，请参阅Caching应用程序数据。 有关应用程序缓存与页面输出缓存之间的差异的详细信息，请参阅 ASP.NET Caching概述。