ajax 数据库中随机读取5条数据动态在页面中刷新

%@ Page Language="C#" AutoEventWireup="true" CodeFile="ajaxRandomData.aspx.cs" Inherits="ajaxRandomData" %>
!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
html xmlns="http://www.w3.org/1999/xhtml" >
head runat="server">
title>ajax随机生成数据/title>
script language="javascript" type="text/javascript" src="ajax/jquery.js">/script>
script >
//页面的初始化
$(document).ready(function(){randomData()});
//页面初始化函数
function randomData()
{
$.ajax({
type:'POST',
url:'ajaxRandomData.aspx',
data:{action:'randon'},
success:randomDatacallbace
});
}
// 页面初始化回调函数
function randomDatacallbace(data)
{
if(data=="")
{
alert("暂时不能为您生成数据");
$("#randomData").html("暂时不能为您生成数据");
}
else
{
$("#randomData").html(data);
randomtime();//每隔5秒钟执行一次
}
}
//动态变化页面中显示的数据。
function randomtime()
{
setTimeout(function(){randomData()},2000)
}
/script>
/head>
body>
form id="form1" runat="server">
div style="text-align:center" id="randomData">
/div>
/form>
/body>
/html>

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.Text;
public partial class ajaxRandomData : System.Web.UI.Page
{
string StrAction = "";
protected void Page_Load(object sender, EventArgs e)
{
StrAction=Request["action"];
if(StrAction=="randon")
{
InitData();
}
}
/// summary>
///创建人：周昕
/// 创建时间：2009-6-9
/// 方法名称：InitData
/// 方法作用：动态的生成表格并随机的生成5条数据
/// /summary>
public void InitData()
{
SqlConnection mycon = new SqlConnection();
mycon.ConnectionString = ConfigurationManager.ConnectionStrings["BoBoConn"].ToString();
//随机生成数据的关键
string sql = "select top 5 *,newid() from loginuser order by newid()";
SqlDataAdapter myda = new SqlDataAdapter(sql, mycon);
DataSet myset = new DataSet();
myda.Fill(myset);
DataTable mytable = myset.Tables[0];
int n = mytable.Rows.Count;
StringBuilder str = new StringBuilder();
str.Append("table style='text-align:left;color:red;width:600px'>tr style='color:#00FF00;font-size:40px;text-align:center'>td colspan='3'>动态刷新用户信息/td>/tr>tr style='color:#6600FF'>td style='text-align:left;width:100px'>用户名/td>td style='text-align:left;width:200px'>用户全名/td>td style='width:250px'>电子油箱/td>/tr>");
for (int i = 0; i n; i++)
{
string username = mytable.Rows[i]["username"].ToString();
string fullname = mytable.Rows[i]["FullName"].ToString();
string email = mytable.Rows[i]["Email"].ToString();
if (i % 2 != 0)
{
str.Append("tr>td>" + username + "/td>");
str.Append("td>" + fullname + "/td>");
str.Append("td>" + email + "/td>/tr>");
}
else
{
str.Append("tr style='color:blue'>td>" + username + "/td>");
str.Append("td>" + fullname + "/td>");
str.Append("td>" + email + "/td>/tr>");
}
}
str.Append("/table>");
Response.Clear();
Response.ContentType = "application/text";
Response.Write(str);
Response.End();
}
}