13、使用页面输出缓存2
8、使用编程方式设置页面输出缓存过期可以使用Response.RemoveOutputCacheItem()方法，以编程的方式从缓存中移除一个页面。
MovieList.aspx
<%@ Page Language="C#" %><%@ OutputCache Duration="3600" 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"></script><html xmlns="http://www.w3.org/1999/xhtml"><head runat="server"> <title></title></head><body> <form id="form1" runat="server"> <div> <%=DateTime.Now.ToString("T") %> <hr /> </div> <asp:GridView ID="grdMovies" runat="server" AutoGenerateColumns="False" DataSourceID="dsMovies"> <Columns> <asp:BoundField DataField="id" HeaderText="id" InsertVisible="False" ReadOnly="True" SortExpression="id" /> <asp:BoundField DataField="Title" HeaderText="Title" SortExpression="Title" /> <asp:BoundField DataField="Director" HeaderText="Director" SortExpression="Director" /> <asp:BoundField DataField="DateReleased" HeaderText="DateReleased" SortExpression="DateReleased" /> <asp:BoundField DataField="Description" HeaderText="Description" SortExpression="Description" /> </Columns> </asp:GridView> <asp:SqlDataSource ID="dsMovies" runat="server" ConnectionString="<%$ ConnectionStrings:Movies %>" SelectCommand="SELECT * FROM "></asp:SqlDataSource> <br /> <br /> <a href="AddMovie.aspx">Add Movie</a> </form></body></html>
AddMovie.aspx
<%@ Page Language="C#" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><script runat="server"> protected void dvMovie_ItemInserted(object sender, DetailsViewInsertedEventArgs e) { HttpResponse.RemoveOutputCacheItem(Page.ResolveUrl("~/MovieList.aspx")); Response.Redirect("~/MovieList.aspx"); }</script><html xmlns="http://www.w3.org/1999/xhtml"><head runat="server"> <title></title></head><body> <form id="form1" runat="server"> <div> <h1> Add Movie </h1> <asp:DetailsView ID="dvMovie" runat="server" AutoGenerateRows="False" DataSourceID="SqlDataSource1" Height="50px" AutoGenerateInsertButton="true" Width="125px" OnItemInserted="dvMovie_ItemInserted"> <Fields> <asp:BoundField DataField="Title" HeaderText="Title" SortExpression="Title" /> <asp:BoundField DataField="Director" HeaderText="Director" SortExpression="Director" /> <asp:BoundField DataField="Description" HeaderText="Description" SortExpression="Description" /> </Fields> </asp:DetailsView> </div> <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:Movies %>" InsertCommand="INSERT INTO Movies(Title, Director, Description) VALUES (@title,@director,@description)" SelectCommand="SELECT Movies.* FROM Movies"> <InsertParameters> <asp:Parameter Name="title" /> <asp:Parameter Name="director" /> <asp:Parameter Name="description" /> </InsertParameters> </asp:SqlDataSource> </form></body></html>
2011-5-22 10:32 danny
MovieListKeyDependency.aspx
<%@ Page Language="C#" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><script runat="server"> protected void Page_Load(object sender, EventArgs e) { Cache.Insert("Movies", DateTime.Now); Response.AddCacheItemDependency("Movies"); }</script><html xmlns="http://www.w3.org/1999/xhtml"><head runat="server"> <title></title></head><body> <form id="form1" runat="server"> <div> <%=DateTime.Now.ToString("T") %> <hr /> <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataSourceID="SqlDataSource1"> <Columns> <asp:BoundField DataField="id" HeaderText="id" InsertVisible="False" ReadOnly="True" SortExpression="id" /> <asp:BoundField DataField="Title" HeaderText="Title" SortExpression="Title" /> <asp:BoundField DataField="Director" HeaderText="Director" SortExpression="Director" /> <asp:BoundField DataField="DateReleased" HeaderText="DateReleased" SortExpression="DateReleased" /> <asp:BoundField DataField="Description" HeaderText="Description" SortExpression="Description" /> </Columns> </asp:GridView> <br /> <br /> <a href="AddMovieKeyDependency.aspx">Add Movie</a> </div> <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:Movies %>" SelectCommand="SELECT * FROM "></asp:SqlDataSource> </form></body></html>
AddMovieKeyDependency.aspx
<%@ Page Language="C#" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><script runat="server"> protected void dvMovie_ItemInserted(object sender, DetailsViewInsertedEventArgs e) { Cache.Remove("Movies"); Response.Redirect("~/MovieListKeyDependency.aspx"); }</script><html xmlns="http://www.w3.org/1999/xhtml"><head id="Head1" runat="server"> <title></title></head><body> <form id="form1" runat="server"> <div> <h1> Add Movie </h1> <asp:DetailsView ID="dvMovie" runat="server" AutoGenerateRows="False" DataSourceID="SqlDataSource1" Height="50px" AutoGenerateInsertButton="true" Width="125px" OnItemInserted="dvMovie_ItemInserted"> <Fields> <asp:BoundField DataField="Title" HeaderText="Title" SortExpression="Title" /> <asp:BoundField DataField="Director" HeaderText="Director" SortExpression="Director" /> <asp:BoundField DataField="Description" HeaderText="Description" SortExpression="Description" /> </Fields> </asp:DetailsView> </div> <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:Movies %>" InsertCommand="INSERT INTO Movies(Title, Director, Description) VALUES (@title,@director,@description)" SelectCommand="SELECT Movies.* FROM Movies"> <InsertParameters> <asp:Parameter Name="title" /> <asp:Parameter Name="director" /> <asp:Parameter Name="description" /> </InsertParameters> </asp:SqlDataSource> </form></body></html>
2011-5-22 10:53 danny
9、以编程方式操作页面输出缓存
HttpCachePolicy类
属性
VaryByHeaders
VaryByParams
HttpCachePolicy支持以下方法
AddValidationCallback
AppendCacheExtension
SetAllowResponseInBrowserHistory
SetCacheability
SetETag
SetETagFromFileDependencies
SetExpires
SetLastModified
SetLastModifiedFromFileDependencies
SetMaxAge
SetNoServerCaching
SetNoStore
SetNoTransform
SetOmitVaryStar
SetProxyMaxAge
SetRevalidation
SetValidUnitlExpires
SetVaryByCustom
ProgramOutputCache.aspx
<%@ Page Language="C#" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><script runat="server"> protected void Page_Load(object sender, EventArgs e) { Response.Cache.SetCacheability(HttpCacheability.Public); Response.Cache.SetExpires(DateTime.Now.AddSeconds(15)); Response.Cache.SetMaxAge(TimeSpan.FromSeconds(15)); Response.Cache.SetValidUntilExpires(true); Response.Cache.SetLastModified(DateTime.Now); Response.Cache.SetOmitVaryStar(true); }</script><html xmlns="http://www.w3.org/1999/xhtml"><head runat="server"> <title></title></head><body> <form id="form1" runat="server"> <div> <%=DateTime.Now.ToString("T") %> <hr /> <a href="ProgramOutputCache.aspx">Request this Page!</a> </div> </form></body></html>
2011-5-22 11:10 danny
10、创建页面输出缓存配置
web.config
<?xml version="1.0"?><!--有关如何配置 ASP.NET 应用程序的详细信息，请访问http://go.microsoft.com/fwlink/?LinkId=169433--><configuration><connectionStrings> <add name="Movies" connectionString="Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\S4_2.mdf;Integrated Security=True;User Instance=True" providerName="System.Data.SqlClient" /></connectionStrings><system.web> <caching> <outputCacheSettings> <outputCacheProfiles> <add name="CachelHour" duration="3600" varyByParam="none"/> </outputCacheProfiles> </outputCacheSettings> </caching> <compilation debug="true" targetFramework="4.0"/></system.web></configuration>
OutputCacheProfile.aspx
<%@ Page Language="C#" %><%@ OutputCache CacheProfile="CachelHour" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><script runat="server"></script><html xmlns="http://www.w3.org/1999/xhtml"><head runat="server"> <title></title></head><body> <form id="form1" runat="server"> <div> <%=DateTime.Now.ToString("T") %> </div> </form></body></html>
2011-5-22 11:16 danny
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