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

php中世界最好的语言Original: 2018-04-02 14:56:442366browse

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>

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>

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);

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);

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!

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

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