我的第一个AJAX程序

AJAX实现分页无刷新
搜索页:

<%@ Page language="c#" Codebehind="WebForm1.aspx.cs" AutoEventWireup="false" Inherits="AJAX现实分页无刷新.WebForm1" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >

<HTML>

<HEAD>

<title>WebForm1</title>

span#tip{background-color:#f00;color:#fff;padding=2px;margin-left:30px;dispaly:inline;}

</style>

//var content = document.getElementById("content");

function getPage(page)

{

var key = document.Form1.title.value;

tip.style.display = "inline";

var xmlhttp;

try{

xmlhttp = new ActiveXObject("Msxml2.xmlhttp");

}catch(e){

try{

xmlhttp = new ActiveXObject("Microsoft.xmlhttp");

}catch(e){

try{

xmlhttp = new XMLHttpRequest();

alert("no ActiveXObject");

}catch(e){}

}

xmlhttp.onreadystatechange = function(){

if(xmlhttp.readyState ==4)

{

tip.style.display= "none";

if(xmlhttp.status == 200)

{

//alert(xmlhttp.responseText) ;

content.innerHTML = xmlhttp.responseText;

}

else

{

alert(xmlhttp.status);

}

xmlhttp.open("get","show.aspx?page=" + page + "&key = " + key );

//alert("show.aspx?page=" + page + "&key = " + key);

xmlhttp.send(null);

}

</script>

</HEAD>

<body>

<TABLE id="Table1" style="WIDTH: 496px; HEIGHT: 75px" cellSpacing="1" cellPadding="1" width="496"

border="0">

<TR>

<TD>

<P align="center">AJAX实现分页无刷新</P>

</TD>

</TR>

<TR>

<TD style="HEIGHT: 12px">找查关键字:<INPUT type="text" id="title"><INPUT type="button" value="查找" onclick="getPage(1)"><span id="tip" style="display:none">正在查找

</span>

</TD>

</TR>

<TR>

</TR>

</TABLE>

</FONT>

</form>

</body>

</HTML>

请求处理页

using System;

using System.Collections;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Web;

using System.Web.SessionState;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.HtmlControls;

using System.Data.SqlClient;

namespace AJAX现实分页无刷新

{

/// <summary>

/// show 的摘要说明。

/// </summary>

public class show : System.Web.UI.Page

{

private int pagesize = 5;

private void Page_Load(object sender, System.EventArgs e)

{

int page =1;

try

{

page = Convert.ToInt32(Request.QueryString["page"]);

}

catch(Exception ee){}

string key = Request.QueryString["key"];

//string key = "p";

int pageCount = getPageCount(key);

System.Text.StringBuilder sb = new System.Text.StringBuilder();

sb.Append("select top " + pagesize.ToString() +"* from products where productName like '%" + key + "%'");

if(page>1)

{

//Response.Write("DDDD");

sb.Append("and productid not in (select top " + Convert.ToString(pagesize*(page-1)) + " productID from products where productName like '%" +

key + "%' order by productid)");

}

sb.Append(" order by productid ");

//Response.Write(key);

//邦定datagrid

DataGrid dg = new DataGrid();

dg.AutoGenerateColumns = false;

dg.AllowPaging = false;

HyperLinkColumn hlc ;

BoundColumn bc;

hlc = new HyperLinkColumn();

hlc.DataTextField = "productName";

hlc.DataNavigateUrlField = "productID";

hlc.DataNavigateUrlFormatString = "xxx.aspx?id={0}";

hlc.HeaderText = "产品名字";

hlc.ItemStyle.Width = Unit.Pixel(400);

hlc.Target = "_blank";

dg.Columns.Add(hlc);

bc = new BoundColumn();

bc.HeaderText = "产品ID";

bc.DataField = "productID";

bc.ItemStyle.Width = Unit.Pixel(200);

dg.Columns.Add(bc);

dg.DataSource = getData(sb.ToString());

dg.DataBind();

Response.Write(getStringByControl(dg) + "<div id='pager'>" + this.GenPager(page , pagesize , pageCount)+ "</div>" );

}

private string GenPager(int page , int pagesize , int count)

{

System.Text.StringBuilder sb = new System.Text.StringBuilder();

int pageCount = (int)Math.Ceiling((double)count/pagesize);

int start = ((page-1)/10)*10+1;

for(int i = start;i<=pageCount && i<start+10;i++)

{

if(i == page) {sb.Append("<span title='当前页'>[" + i.ToString() + "]</span>");}

else{sb.Append("<a href='javascript:getPage(" + i.ToString() +")' title='第" + i.ToString() + "页'>[" + i.ToString() + "]</a>");}

}

if(start >1)

{

sb.Insert(0,"<a href='javascript:getPage(1)' title ='首页'>||首页</a>");

sb.Insert(0,"<a href='javascript:getPage(" + Convert.ToString(start -1) + " )' title='第" + Convert.ToString(start-1) + "页'><<</a>" );

}

if(start +10 <pageCount)

{

sb.Append("<a href='javascript:getPage(" + Convert.ToString(start + 10) + ")' title ='第" + Convert.ToString(start +10) + "页'>>></a>");

sb.Append("<a href='javascript:getPage(" + pageCount.ToString() + ")' title ='(末页)'>||末页</a>");

}

return sb.ToString();

}

private string getStringByControl(System.Web.UI.Control c)

{

System.Text.StringBuilder sb = new System.Text.StringBuilder();

System.IO.StringWriter write = new System.IO.StringWriter(sb);

System.Web.UI.HtmlTextWriter htw = new HtmlTextWriter(write);

c.RenderControl(htw);

return sb.ToString();

}

private DataTable getData(string sqlText)

{

SqlDataAdapter da = new SqlDataAdapter(sqlText , "server=.;uid=sa;pwd=;database=northwind;");

DataTable dt = new DataTable();

da.Fill(dt);

return dt;

}

private int getPageCount(string key)

{

SqlConnection conn = new SqlConnection("server=.;uid=sa;pwd=;database=northwind;");

SqlCommand cmd = new SqlCommand("select count(*) from products where productName like '%" + key + "%'" , conn);

conn.Open();

return Convert.ToInt32(cmd.ExecuteScalar());

}

Web 窗体设计器生成的代码

}

终于实现了我的第一个AJAX程序...........

posted on 2006-08-14 22:03 O F F I C E 阅读(422) 评论(0) 编辑收藏举报