Detailed explanation of the steps to implement data paging query with ajax-JS Tutorial-php.cn

Detailed explanation of the steps to implement data paging query with ajax

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Release： 2018-04-02 14:56:44

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This time I will bring you a detailed explanation of the steps to implement ajax data paging query. What are the precautions for ajax to implement data paging query. The following is a practical case, let's take a look.

Use ajax to query the database and paginate the query data for your reference. The specific content is as follows

Main page code

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<script src="jquery-1.11.2.min.js"></script>
<style type="text/css">
.dangqian{ background-color:#69F}
</style>
</head>
<body>
<p>
<input type="text" id="key" />
<input type="button" value="查询" id="chaxun" />
</p>
<table width="100%" border="1" cellpadding="0" cellspacing="0">
 <tr>
  <td>代号</td>
  <td>名称</td>
  <td>父级代号</td>
 </tr>
 
 <tbody id="nr">
 
 </tbody> 
</table>
<p id="xinxi">
</p>
</body>

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js code

<script type="text/javascript">
var page = 1; //当前页 定义一个变量 当前页
Load(); //加载数据
LoadXinXi(); //加载分页信息
//查询
$("#chaxun").click(function(){
  page = 1;
  Load(); //加载数据
  LoadXinXi(); //加载分页信息
 })
function Load()
{
 var key = $("#key").val(); //查询条件
 
 $.ajax({
   url:"chuli.php",
   data:{page:page,key:key},
   type:"POST",
   dataType:"JSON",
   success: function(data){
     var str = "";
     for(var k in data)
     {
      str +="<tr><td>"+data[k].AreaCode+"</td><td>"+data[k].AreaName+"</td><td>"+data[k].ParentAreaCode+"</td></tr>";
     }
     $("#nr").html(str);//把数据返回表格
    }
  });
}
functionLoadXinXi()
{
 var str = "";
 var minys = 1;
 var maxys = 1;
 var key = $("#key").val();
 
 //查总页数
 $.ajax({
   async:false,
   url:"zys.php",
   data:{key:key},
   type:"POST",
   dataType:"TEXT",
   success: function(d){
     maxys = d;
    }
  });
 
 str += "<span>总共："+maxys+"页</span>  ";
 str += "<span id=&#39;prev&#39;>上一页</span>";
 
 for(var i=page-2;i<page+3;i++)
 {
  if(i>=minys && i<=maxys)
  {
   if(i==page)
   {
    str += "<span class=&#39;dangqian&#39; bs=&#39;"+i+"&#39;>"+i+"</span>  ";
   }
   else
   {
    str += "<span class=&#39;list&#39; bs=&#39;"+i+"&#39;>"+i+"</span>  ";
   }
  
  }
 }
  
 str += "<span id=&#39;next&#39;>下一页</span>"; 
 
 $("#xinxi").html(str);
 
 //给上一页添加点击事件
 $("#prev").click(function(){
   page = page-1;
   if(page<1)
   {
    page=1;
   }
   Load(); //加载数据
   LoadXinXi(); //加载分页信息
  })
 //给下一页加点击事件
 $("#next").click(function(){
   page = page+1;
   if(page>maxys)
   {
    page=maxys;
   }
   Load(); //加载数据
   LoadXinXi(); //加载分页信息
  })
 //给中间的列表加事件
 $(".list").click(function(){
   page = parseInt($(this).attr("bs"));
   Load(); //加载数据
   LoadXinXi(); //加载分页信息
  })
}
</script>

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Processing Page 1

<?php
include("DBDA.class.php");
$db = new DBDA();
$key = $_POST["key"];
$num = 20;
$sql = "select count(*) from chinastates where areaname like &#39;%{$key}%&#39;";
$zts = $db->StrQuery($sql);
echo ceil($zts/$num);

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Processing Page 2

<?php
include("DBDA.class.php");
$db = new DBDA();
$page = $_POST["page"];
$key = $_POST["key"];
$num = 20;
$tiao = ($page-1)*$num;
$sql = "select * from chinastates where areaname like &#39;%{$key}%&#39; limit {$tiao},{$num}";
echo $db->JSONQuery($sql);

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I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!