Can not use the top of the database, later found in such a way to achieve ... Here is a summary of this method to write a page. Friends who are interested can study together ....
Foreground code:
Copy Code code as follows:
<%@ 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 ">
<title>ajax randomly generated data </title>
<script language= "javascript" type= "Text/javascript" src= "Ajax/jquery.js" ></script>
<script >
Initialization of the page
$ (document). Ready (function () {randomdata ()});
Page initialization function
function Randomdata ()
{
$.ajax ({
Type: ' POST ',
URL: ' ajaxrandomdata.aspx ',
Data:{action: ' Randon '},
Success:randomdatacallbace
});
}
Page initialization callback function
function Randomdatacallbace (data)
{
if (data== "")
{
Alert ("Cannot generate data for you temporarily");
$ ("#randomData"). HTML ("Generate data for you temporarily");
}
Else
{
$ ("#randomData"). HTML (data);
Randomtime ()://every 5 seconds
}
}
Dynamically changing the data displayed in the page.
function Randomtime ()
{
settimeout (function () {randomdata ()},2000)
}
</script>
<body>
<form id= "Form1" runat= "Server" >
<div style= "Text-align:center" id= "Randomdata" >
</div>
</form>
</body>
Background code:
Copy Code code as follows:
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>
Create Person: Zhou Xin
Date Created: 2009-6-9
Method Name: InitData
Method action: Dynamically generate tables and randomly generate 5 of data
</summary>
public void InitData ()
{
SqlConnection mycon = new SqlConnection ();
Mycon. ConnectionString = configurationmanager.connectionstrings["Boboconn"]. ToString ();
The key to randomly generating data
String sql = "SELECT Top 5 *,newid () to 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 ' > Dynamic refresh User information </td></tr><tr style= ' color: #6600FF ' ><TD style= ' text-align:left;width:100px ' > Username </td><td style= ' text-align:left;width:200px ' > User full name </td ><TD style= ' width:250px ' > Electronic fuel Tank </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 ();
}
}
Effect chart
