不能用數(shù)據(jù)庫(kù)中的Top,后面發(fā)現(xiàn)了用這樣一個(gè)方法可以實(shí)現(xiàn)。。現(xiàn)就這個(gè)方法總結(jié)寫了一個(gè)頁(yè)面。有興趣的朋友們可以一起學(xué)習(xí)下。。
前臺(tái)代碼：
代碼如下:
<%@ 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隨機(jī)生成數(shù)據(jù)</title>
<script language="javascript" type="text/javascript" src="ajax/jquery.js"></script>
<script >
//頁(yè)面的初始化
$(document).ready(function(){randomData()});
//頁(yè)面初始化函數(shù)
function randomData()
{
$.ajax({
type:'POST',
url:'ajaxRandomData.aspx',
data:{action:'randon'},
success:randomDatacallbace
});
}
// 頁(yè)面初始化回調(diào)函數(shù)
function randomDatacallbace(data)
{
if(data=="")
{
alert("暫時(shí)不能為您生成數(shù)據(jù)");
$("#randomData").html("暫時(shí)不能為您生成數(shù)據(jù)");
}
else
{
$("#randomData").html(data);
randomtime();//每隔5秒鐘執(zhí)行一次
}
}
//動(dòng)態(tài)變化頁(yè)面中顯示的數(shù)據(jù)。
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>
后臺(tái)代碼：
代碼如下:
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;
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>
///創(chuàng)建人：周昕
/// 創(chuàng)建時(shí)間：2009-6-9
/// 方法名稱：InitData
/// 方法作用：動(dòng)態(tài)的生成表格并隨機(jī)的生成5條數(shù)據(jù)
/// </summary>
public void InitData()
{
SqlConnection mycon = new SqlConnection();
mycon.ConnectionString = ConfigurationManager.ConnectionStrings["BoBoConn"].ToString();
//隨機(jī)生成數(shù)據(jù)的關(guān)鍵
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'>動(dòng)態(tài)刷新用戶信息</td></tr><tr style='color:#6600FF'><td style='text-align:left;width:100px'>用戶名</td><td style='text-align:left;width:200px'>用戶全名</td><td style='width:250px'>電子油箱</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();
}
}
效果圖
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