SqlCacheDependency asp.net　页面缓存

SqlCacheDependency 
  页的Sql缓存 
  Cahce/SqlCachePage.aspx

<%@ Page Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true" CodeFile="SqlCachePage.aspx.cs"
Inherits="Cahce_SqlCachePage" Title="页的Sql缓存" %>
<%@ OutputCache Duration="999999" SqlDependency="VS2005_Test:sqlcache" VaryByParam="none" %>
<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server">
<p>
Duration="999999" SqlDependency="VS2005_Test:sqlcache" VaryByParam="none"<br />
如果是SqlServer2005则改成SqlDependency="CommandNotification<br />
注意配置文件中的配置
</p>
<p>
<%=DateTime.Now %>
</p>
</asp:Content>

  数据源控件的Sql缓存 
  Cahce/SqlCachePage.aspx

<%@ Page Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true" CodeFile="SqlCacheDataSourceControl.aspx.cs"
Inherits="Cahce_SqlCacheDataSourceControl" Title="数据源控件的Sql缓存" %>
<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server">
<p>
DataSource控件设置如下属性：EnableCaching="True" SqlCacheDependency="VS2005_Test:sqlcache"
CacheDuration="Infinite"<br />
如果是SqlServer2005则改成SqlDependency="CommandNotification<br />
注意配置文件中的配置
</p>
<p>
<%=DateTime.Now %>
</p>
<p>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" EnableCaching="True" SqlCacheDependency="VS2005_Test:sqlcache"
CacheDuration="Infinite" ConnectionString="<%$ ConnectionStrings:SqlConnectionString %>"
SelectCommand="SELECT * FROM [SqlCache]"></asp:SqlDataSource>
<asp:GridView ID="GridView1" runat="server" DataSourceID="SqlDataSource1" AllowSorting="True">
</asp:GridView>
</p>
</asp:Content>

  web.config中的相关配置

<connectionStrings>
<add name="SqlConnectionString" connectionString="Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\VS2005_Test.mdf;Integrated Security=True;User Instance=True"
providerName="System.Data.SqlClient" />
</connectionStrings>
<system.web>
<caching>
<sqlCacheDependency enabled="true" pollTime="10000">
<databases>
<add name="VS2005_Test" connectionStringName="SqlConnectionString" />
</databases>
</sqlCacheDependency>
<!-- 如果是SqlServer2005的话，则只需如下设置，因为SqlServer支持基于通知的缓存失效
<sqlCacheDependency enabled="true" />
-->
</caching>
</system.web>

注意 
  Sql Server 2005 基于通知的缓存失效，不用aspnet_regsql设置，要设置属性SqlDependency="CommandNotification"。在首次执行某 SQL 查询之前，必须在应用程序某处调用 System.Data.SqlClient.SqlDependency.Start()
方法。此方法应放在 global.asax 文件的 Application_Start() 事件中。