将DataSet数据存入缓存Cache中并使用

源代码如下：

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

using System.Data.SqlClient;

public partial class Cacheds : System.Web.UI.Page
{

protected void Page_Load(object sender, EventArgs e)
{
DataSet ds=(DataSet)Cache.Get("ds_cache");
if (!IsPostBack)
{
if (ds == null)
{
SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["pubsConn"].ConnectionString);
SqlDataAdapter sda = new SqlDataAdapter();
sda.SelectCommand = new SqlCommand("select title_id,title,type from titles", conn);
DataSet cds = new DataSet();
sda.Fill(cds, "t1");

cds.ExtendedProperties.Add("ds_t1", DateTime.Now.ToLongTimeString());
Cache.Insert("ds_cache", cds, null, DateTime.Now.AddMinutes(2), TimeSpan.Zero);

Response.Write("对象已经从数据库填充并存入Cache");
GridView1.DataSource = cds.Tables["t1"];
GridView1.DataBind();
}

else
{
Response.Write("对象还在缓存Cache中，直接调用");
GridView1.DataSource = ds.Tables["t1"];
GridView1.DataBind();
}
}
}
protected void Button1_Click(object sender, EventArgs e)
{
Cache.Remove("ds_cache");
}
}