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发布时间:2016-01-01 作者:网络 阅读:207次

本文实例讲述了asp.net+ajax简单分页实现方法。分享给大家供大家参考,具体如下:

这里涉及两个.aspx文件,一个叫Default.aspx,一个叫AjaxOperations.aspx,第一个用来显示一些测试数据,后一个用来对分页进行处理。js文件夹下面还有一个testJs.js的文件,它就是ajax操作的核心部分。不错,code is cheap。看代码:

/*testJs.js*/ // 此函数等价于document.getElementById /document.all function $(s) { if (document.getElementById) { return eval('document.getElementById("' + s + '")'); } else { return eval('document.all.' + s); } } // 创建 XMLHttpRequest对象,以发送ajax请求 function createXMLHTTP() { var xmlHttp = false; var arrSignatures = ["MSXML2.XMLHTTP.5.0", "MSXML2.XMLHTTP.4.0", "MSXML2.XMLHTTP.3.0", "MSXML2.XMLHTTP", "Microsoft.XMLHTTP"]; for (var i = 0; i < arrSignatures.length; i++) { try { xmlHttp = new ActiveXObject(arrSignatures[i]); return xmlHttp; } catch (oError) { xmlHttp = false; //ignore } } // throw new Error("MSXML is not installed on your system."); if (!xmlHttp && typeof XMLHttpRequest != 'undefined') { xmlHttp = new XMLHttpRequest(); } return xmlHttp; } //window.onload = showPages(1, 10, 100); //cP目前页码, tP总页数 ,tN总记录数 function showPages(cP, tP, tN) { //处理页码大于总页数 if (cP >= tP) { cP = tP; } //处理页码小于1 if (cP < 1) { cP = 1; } var trPg = $("trPager"); var newCellOne = trPg.insertCell(0); newCellOne.width = "20%"; var newCellTwo = trPg.insertCell(1); newCellTwo.width = "15%"; newCellTwo.id = "pgSummary"; var newCellThree = trPg.insertCell(2); newCellThree.width = "45%"; newCellThree.id = "pgNumContext"; var newCellFour = trPg.insertCell(3) newCellFour.width = "20%"; newCellTwo.innerHTML = "共" + tN + "项 第" + cP + "/" + tP + "页"; var pageHtml = " 首页"; pageHtml += " 上页 "; for (var i = 1; i < tP + 1; i++) { var numColor = ""; if (i == 1) numColor = "red"; pageHtml += "" + i + " "; } pageHtml += " 下页"; pageHtml += " 尾页"; pageHtml += "  " + ""; newCellThree.innerHTML = pageHtml; } //构造页面跳转的js函数,函数中需要判断输入的页号是否是合法的数值 function forward() { if (!(/^([-]){0,1}([0-9]){1,}$/.test($("pgNumber").value))) { //输入的值不合法 alert("请输入合法的页号!"); $("pgNumber").focus(); $("pgNumber").select(); } else gotoPage($("pgNumber").value); } //处理在跳转页面上按下回车的情况 function handleEnterOnPgNumber() { if (event.keyCode == 13) { forward(); return false; } return true; } function gotoPage(oNum) { // 页数不能为0或者为负数 (首页,尾页) if (oNum > 0) { var totalNumber = parseInt($("totalNum").innerText); //总记录数 var curPgNumber = parseInt($("cuPgNumber").innerText); var totalPgNumber = parseInt($("sumPgNumber").innerText); // 总页数 if (parseInt(oNum) <= totalPgNumber) { chgPages(oNum, totalPgNumber, totalNumber); for (var k = 1; k < totalPgNumber + 1; k++) { $("numPg" + k).style.color = ""; } $("numPg" + oNum).style.color = "red"; getPagerInfo(oNum); } else { alert("请输入合法的页号!"); $("pgNumber").focus(); $("pgNumber").select(); return; } } } function goToNextPrev(oNum) { var addNum = parseInt(oNum); var totalNumber = parseInt($("totalNum").innerText); //总记录数 var curPgNumber = parseInt($("cuPgNumber").innerText); var totalPgNumber = parseInt($("sumPgNumber").innerText); // 总页数 //如果当前页是第一页,点击前一页不用刷新 //如果当前页是最后一页,点击下一页不用刷新 if ((curPgNumber + addNum) > 0 && (curPgNumber + addNum) <= totalPgNumber) { chgPages(parseInt(curPgNumber + addNum), totalPgNumber, totalNumber); for (var k = 1; k < totalPgNumber + 1; k++) { $("numPg" + k).style.color = ""; } $("numPg" + parseInt(curPgNumber + addNum)).style.color = "red"; getPagerInfo(parseInt(curPgNumber + addNum)); } } function chgPages(cuPg, toPg, tNum) { // $("totalNum").innerHTML = tNum; $("cuPgNumber").innerHTML = cuPg; //$("sumPgNumber").innerHTML = toPg; } function getPagerInfo(oNum) { // 处理请求,更新内容 var xmlReq = createXMLHTTP(); xmlReq.open("post", "/AjaxOperations.aspx?pgNumber=" + oNum, true); xmlReq.onreadystatechange = function() { if (xmlReq.readyState == 4) { if (xmlReq.status == 200) { //xmlReq.responseText为输出的那段字符串 $("tbTest").innerHTML = xmlReq.responseText; } else { $("tbTest").innerHTML = "  获取数据中,请稍等..."; //alert("Connect the server failed!"); } } } xmlReq.send(null); }

Default.aspx:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WebTest2008.Default" %>



 
 
 


 
第1页<>
<>

Default.aspx.cs:

using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace WebTest2008
{
 public partial class Default : System.Web.UI.Page
 {
  protected void Page_Load(object sender, EventArgs e)
  {
  }
 }
}

AjaxOperations.aspx:
复制代码 代码如下:<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="AjaxOperations.aspx.cs" Inherits="WebTest2008.AjaxOperations" %>

AjaxOperations.aspx.cs:

using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace WebTest2008
{
 public partial class AjaxOperations : System.Web.UI.Page
 {
  protected void Page_Load(object sender, EventArgs e)
  {
   if (!string.IsNullOrEmpty(Request["pgNumber"]))
   {
    //int pgNum = Convert.ToInt32(Request["pgNumber"]);
    Response.Write("第" + Request["pgNumber"] + "页");
   }
  }
 }
}

Ok了,在我的机器上(vs2008)测试通过,简单的ajax分页效果就实现了。

希望本文所述对大家ajax程序设计有所帮助。

关键字词:AJAX相关  

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