Asp.net2.0 页面缓存技术

1. 回显缓存

加入这一句 <%@ OutputCache Duration=60 VaryByParam=none %>

%@ 为页面属性

Duration 为缓存超时时间, 60 秒后过期

VaryByParam 为因哪个参数而改变

 

2. 回调缓存

<%@ OutputCache Duration=60 VaryByParam=stata %>

根据 lll.aspx?stata=的内容分别缓存

 

 下面的方法可以根据内容刷新

<script runat="server">

    Shared Function GetCurrentDate(ByVal context As HttpContext) As String

        Return Now.ToString()

    End Function

</script>

 

<asp:Substitution ID="Substitution1" runat="server" MethodName="GetCurrentDate" />

 

3.碎片缓存

自己做控件，使用<%@ OutputCache Duration=60 VaryByParam=none %>

只缓存这个控件

 

 

4 数据缓存

   <script runat="server">

    Sub Page_Load(ByVal Src As Object, ByVal E As EventArgs)

        Dim Source As DataView

 

        ' try to retrieve item from cache

        ' if it's not there, add it

        Source = Cache("MyDataSet")

 

        If Source Is Nothing Then

            Dim MyConnection As SqlConnection

            Dim MyCommand As SqlDataAdapter

 

            MyConnection = New SqlConnection(ConfigurationManager.ConnectionStrings("pubsConnectionString").ConnectionString)

            MyCommand = New SqlDataAdapter("select * from Authors", MyConnection)

 

            Dim ds As New DataSet

            MyCommand.Fill(ds, "Authors")

 

            Source = New DataView(ds.Tables("Authors"))

            Cache("MyDataSet") = Source

 

            CacheMsg.Text = "Dataset created explicitly"

        Else

            CacheMsg.Text = "Dataset retrieved from cache"

        End If

 

        MyGrid.DataSource = Source

        MyGrid.DataBind()

    End Sub

 </script>

 

5 配置数据库连接池

 

C:/>dir aspnet_regsql.exe /s

 驱动器 C 中的卷是 系统

 卷的序列号是 5CE1-C72D

 

 C:/WINDOWS/Microsoft.NET/Framework/v2.0.50727 的目录

 

2005-09-23 07:28           106,496 aspnet_regsql.exe

               1 个文件        106,496 字节

 

C:/>cd /WINDOWS/Microsoft.NET/Framework/v2.0.50727

 

C:/WINDOWS/Microsoft.NET/Framework/v2.0.50727>aspnet_regsql.exe

 

 

运行 asp.net sql Server配置向导

Aspnet_regsql.exe –S “/DBNAME” –E –d “pubs” –ed

-E windows 授权

–ed 为enabled

 

 

Aspnet_regsql.exe –S “/DBNAME” –E –D “pubs” –et –t “authors”

当 pubs.authors 改变时改变缓存

<%@ OutputCache Duration="9999999" VaryByParam="none" SqlDependency="pubs.authors" %>

 

 

5 缓存配置

     <caching>

              <outputCache>

                   <diskCacheenabled="true"maxSizePerApp="2" />

              </outputCache>

              <outputCacheSettings>

                   <outputCacheProfiles>

                        <addname="CacheFor60Seconds"duration="60" />

                   </outputCacheProfiles>

              </outputCacheSettings>

              <!--

              <sqlCacheDependency enabled="true" pollTime="1000" >

                   <databases>

                       <add name="PubsDB" connectionStringName="pubsConnectionString" />

                   </databases>

              </sqlCacheDependency>

              -->

         </caching>