Cache测试应用

目的：

本例完成建立缓存，清除缓存使用缓存进行数据绑定

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;
using System.Web.Caching;

public partial class Default7 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }

    public void returnDataTable()
    {

        if (Cache["MembersDataSet"] == null)
        {
            Cache.Insert("MembersDataSet", (DataSet)CreateDataSet());
            DataSet ds = (DataSet)Cache["MembersDataSet"];
            Response.Write(ds.Tables[0].Rows[0]["LotteryID"].ToString());
            Response.Write("<br>");
            Response.Write(ds.Tables[0].Rows[1]["LotteryID"].ToString());
        }
        else
        {
            DataSet ds = (DataSet)Cache["MembersDataSet"];
            Response.Write(ds.Tables[0].Rows[0]["LotteryID"].ToString());
            Response.Write("<br>");
            Response.Write(ds.Tables[0].Rows[1]["LotteryID"].ToString());
            //GridView1.DataSource = ds;
            //GridView1.DataBind();

        }
    }

    public DataSet CreateDataSet()
    {
        DataSet ds = new DataSet();
        using (SqlConnection cn = new SqlConnection("server=jhtest4;uid=sa;pwd=123;database=MyLottery"))
        {
            string sql = "select * from LotteryTable";
            SqlDataAdapter da = new SqlDataAdapter(sql, cn);

            try
            {
                da.Fill(ds);
            }
            catch (Exception ex)
            {
                Response.Write(ex.Message.ToString());
            }

            finally
            {
                cn.Close();
            }
        }

        return ds;
    }

    protected void Button1_Click(object sender, EventArgs e)
    {
        returnDataTable();
    }
    protected void Button2_Click(object sender, EventArgs e)
    {
        Cache.Remove("MembersDataSet");
        Response.Write("缓存清除成功");
    }
}