Detailed steps to implement database modification and addition functions using Ajax-JS Tutorial-php.cn

This time I will bring you the detailed steps to implement Ajax to modify and add database functions. What are the precautions for Ajax to implement database modification and addition functions. The following is a practical case, let’s take a look.

Modify and add information about the database, which can be used for any addition and modification. These databases are the same as the previous essay databases

1. Display the database The information

(1) The display effect can also be displayed using the tab page of bootstrap (bootstrap must be introduced before)

<ul id="myTab" class="nav nav-tabs">
  <li class="active" style=" font-size:30px" ><a href="#home" rel="external nofollow" data-toggle="tab"> 饭面类</a>
  </li>
  <li style=" font-size:30px"><a href="#ios" rel="external nofollow" data-toggle="tab">特色小吃</a></li>
  <li class="dropdown" style=" font-size:30px">
   <a href="#" rel="external nofollow" id="myTabDrop1" class="dropdown-toggle"data-toggle="dropdown">酒水饮品 <b class="caret"></b>
   </a>
   <ul class="dropdown-menu" role="menu" aria-labelledby="myTabDrop1" style=" font-size:25px">
    <li><a href="#jmeter" rel="external nofollow" tabindex="-1" data-toggle="tab">
     酒水</a>
    </li>
    <li><a href="#ejb" rel="external nofollow" tabindex="-1" data-toggle="tab">
     饮品</a>
    </li>
   </ul>
  </li>
</ul>

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2. Modify the content

(1) After the title is displayed, there is the content of each title Now, you can use ajax to traverse

<p id="mian"> 
</p>

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(2) Perform database traversal

$.ajax({
 url:"mianlei.php", //编写处理页面
 dataType:"TEXT",
 success: function(d){
  var hang = d.split("|"); //拆分字符“|”串：显示行
  var str = "";
  for(var i=0;i<hang.length;i++)
  {
   var lie = hang[i].split("^"); //拆分字符串“^”:显示列
   str += "<input type=&#39;button&#39; value=&#39;"+lie[2]+"&#39; class=&#39;aa1&#39; code=&#39;"+lie[1]+"&#39; data-toggle=&#39;modal&#39; data-target=&#39;#myModal&#39;/> ";
  }
 　　$("#mian").html(str); //把遍历的内容写在上面的     
  }
})

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(3) The processing page is written as follows

<?php
include("DBDA.php"); //调用封装好的数据库类
$db = new DBDA(); 
$sql = "select * from caidan where fcode =(&#39;1101&#39;)"; //查询符合父级号的所有信息
echo $db->StrQuery($sql); //输出结果

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(4) Then you can modify the content When modifying using the modal box

<p class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
  <p class="modal-dialog">
   <p class="modal-content">
    <p class="modal-header">
      <button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
      <h4 class="modal-title" id="myModalLabel">修改</h4>
   　　　</p>
   　　 <p class="modal-body" id="content">
     <!--这里是显示的修改的内容-->
   　　 </p>
   　　　<p class="modal-footer">
    　　<button type="button" class="btn btn-default" data-dismiss="modal">关闭</button>
    　　<button type="button" class="btn btn-primary" id="tijiao">提交</button>
   　　　</p>
   </p><!-- /.modal-content -->
  </p><!-- /.modal -->
</p>

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(5), the original name and price should be displayed by default, so the code number traversed previously must be passed over

$(".aa1").click(function(){
 var code = $(this).attr("code"); //找到code值
 $.ajax({
  url:"xiugaichuli.php", //编写处理页面
  data:{c:code}, //将code值传过去
  type:"POST",
  dataType:"TEXT",
  success: function(d){
   var hang = d.split("|"); //拆分字符“|”串：显示行
   var str = "";
   for(var i=0;i<hang.length;i++)
   {
    var lie = hang[i].split("^"); //拆分字符串“^”:显示列
    str += "<p>名称：<input type=&#39;text&#39; value=&#39;"+lie[2]+"&#39; code=&#39;"+lie[1]+"&#39; class=&#39;name&#39; /></p><br /><p>价格：<input type=&#39;text&#39; value=&#39;"+lie[0]+"&#39; code=&#39;"+lie[1]+"&#39; class=&#39;price&#39; /></p>";
   }
   $("#content").html(str); //写入模态框中的content的位置
     }
 })
})

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(6) After clicking the submit button, it is written to the database, and it has been modified here. Click the submit button to make changes

$("#tijiao").click(function(){
 var code = $(".name").attr("code"); //找到名称中的代号
 var code = $(".price").attr("code"); //找到价格的代号
 var name = $(".name").val(); //找到名称的值
 var price = $(".price").val(); //找到价格的值
 $.ajax({
  url:"tjsk.php", //处理页面的编写
  data:{n:name,p:price,c:code}, //将值传到处理页面
  type:"POST",
  dataType:"TEXT",
  success: function(data){ ///处理页面成功后输出
   if(data.trim()=="ok")
   {
   　　alert("修改成功！");
   }
  }
 })
})

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##3. Add content

(1) Write a pop-up box as above, with a text box inside

<p id="tianjia" data-toggle=&#39;modal&#39; data-target=&#39;#myModall&#39;>添加菜品</p>
<p class="modal-content">
  <p class="modal-header">
   <button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
   <h4 class="modal-title" id="myModalLabel">添加菜品</h4>
  </p>
  <p class="modal-body" id="content">
   <p id="name">名称：<input type="text" id="ming"/></p>
   <br />
  <p id="price">价格：<input type="text" id="jia"/></p>
  </p>
  <p class="modal-footer">
   <button type="button" class="btn btn-primary" id="tijiao1">提交</button>
  </p>
</p>

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(2) After filling in the information, click the submit button to write to the database

$("#tijiao1").click(function(){
 var n = $("#ming").val(); //找到名称文本框的值
 j = $("#jia").val(); //找到价格文本框的值
 $.ajax({
  url:"tianjia.php", //编写处理页面
  data:{n:n,j:j}, //将值传过去
  type:"POST",
  dataType:"TEXT",
  success: function(d){
   if(d.trim()=="ok")
   {
   　　alert ("添加成功！");
   }
  　　　window.location.href="xiugaicanpin.php" rel="external nofollow" ;
  } 
　　　　}) 
})

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(3) Process the writing of the page

<?php
 include("DBDA.php");
 $db = new DBDA();
 $n = $_POST["n"]; //将传来的值接收
 $j = $_POST["j"];
 $sql = " select max(code) from caidan where fcode=&#39;1101&#39; "; //查找这个父级代号的最大代号
 $attr = $db->Query($sql);
 foreach($attr as $v)
 {
  $c = $v[0]+1; //使最大值加1
  $sqll = " insert into caidan values('{$j}','{$c}','{$n}','1101','','','')"; //写入数据库
  $db->Query($sqll,0);
  echo "ok";
 }
?>

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(4) After adding, look at the results

This is it, it’s over, the simple addition and modification functions, and the deletion function will be added later~~

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