How to use ajax_Examples, ajax data processing

亚连
Release: 2018-05-22 14:16:30
Original
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Below I will bring you an article about how to use ajax_examples and ajax data processing. Let me share it with you now and give it as a reference for everyone.

It should be noted that the encapsulated database called and the jQuery storage address

1. Registration

(1) Write a text box to verify the user name

  //这个使用来显示提示信息的
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(2) Use jQuery Write the statement: The user name cannot be used if it exists. The user name can be

$("#uid").blur(function(){   //取用户名   var uid = $(this).val();   //查数据库,调ajax   $.ajax({ //ajax方法中必须是json格式 url: "zhucecl.php", //处理页面的地址 data:{u:uid}, //这里是Json的格式:u是起的个名字,uid才是值 type:"POST", //数据提交方式 dataType:"TEXT", //返回的数据格式:字符串格式 success:function(data){ //成功的话返回匿名函数(回调函数) //执行处理页面成功后的语句 var str = ""; if(data=="OK") {   str = "用户名可以使用";   $("#tishi").css("color","green"); } else {   str = "已有用户名";   $("#tishi").css("color","red"); } $("#tishi").text(str);   }       }); })
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(3) Registration processing page: I have written this many times, no more sentences. Sentence explanation

Query($sql); //判断用户名是否存在 if($attr[0][0]>0) {   echo "NO"; //有重复的用户名 } else {   echo "OK"; //没有重复的用户名 } ?>
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## 2. Login

(1) Write the text box and login button

账号:

密码:

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##(2) Write the jQuery statement

$("#btn").click(function(){   var uid=$("#uid").val(); //找到用户   var pwd=$("#pwd").val(); //找到密码   //调ajax方法,里面要用json格式   $.ajax({ url:"denglucl.php", //登陆的处理页面 data:{uid:uid,pwd:pwd}, type:"POST", dataType:"text", success: function(data) { if(data.trim()=="OK") { window.location.href="zhuce.php" rel="external nofollow" ; //用户名密码正确,进入一个页面 } else { alert("用户名密码输入错误"); } }   }) })
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(3) Login processing page: I have written it many times, so I won’t explain it sentence by sentence

Query($sql); if(!empty($pwd) && !empty($attr) && $attr[0][0]==$pwd) //密码不为空,数组不为空,输入密码和查出的密码是否相同 {   echo "OK"; } else {   echo "ON"; }
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Successful login:

3. Ajax data processing

(1) First display the name line, then edit it normally. The content you want to display

      
代号 名称 价格 产地 库存 操作
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(2) Write a table to display the content

   //里面放遍历的某个表中的数据内容 
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(3) Write jQuery and execute it after the page is loaded

$(document).ready(function(e) {   $.ajax({ url:"xianshicl.php", dataType:"TEXT", success: function(data){ //处理页面处理完成后执行的    });
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(4) Write display data processing page (two methods)

include("DBDA.class.php"); //调用封装好的类:注意存在位置 $db = new DBDA(); //造新对象 $sql = "select * from fruit"; //写sql语句 echo $db->StrQuery($sql); //1.调用封装好的拼接数组为字符串的方法 /* //2. $attr = $db->Query($sql); //调用封装类中的方法来执行sql语句 $str = ""; foreach($attr as $v) {   $str .= implode("^",$v)."|"; //拼接数组为字符串 } echo substr($str,0,strlen($str)-1); //截取字符串:最后的拼接符不显示
*/
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(5) After processing the page , write the statement after the end of the processing page in the ajax success method of the main page

success: function(data){   var hang = data.split("|"); //拆分字符“|”串:显示行   var str = "";   for(var i=0;i"+lie[1]+""+lie[2]+""+lie[3]+""+lie[5]+"操作"; //显示的行和单元格   }   $("#bg").html(str); }
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This will display:

The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

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