JSQL 基于客户端的成绩统计实现方法

复制代码 代码如下:

  <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

  <html xmlns="http://www.w3.org/1999/xhtml" >

  <head>

  <meta http-equiv="Content-Type" content="text/html; charset=utf-8">

  <title>Marks Count</title>

  <script type="text/javascript" src="../src/YESBRAIN.js"></script>

  <script type="text/javascript" src="../src/JSQL.js"></script>

  <script type="text/javascript" src="../src/JSQL-Memory.js"></script>

  <script type="text/javascript" src="../src/JSQL-DOM.js"></script>

  <style>

  #marks input {

  width: 100px;

  }

  </style>

  </head>

  <body>

  <center>

  <h1>Marks Count</h1>

  <p>

  <button onclick="insertline();"> Add one line </button>

  <button onclick="savemarks();"> Save Changes </button>

  <span>By<span>

  <select id="byfield">

  <option value="chinese" selected="selected">Chinese</option>

  <option value="math">Math</option>

  <option value="english">English</option>

  </select>

  <select id="ascdesc">

  <option value="desc" selected="selected">Desc</option>

  <option value="asc">Asc</option>

  </select>

  <button onclick="order();">Order</button>

  </p>

  <form name="marks" id="marks">

  <span>Name:</span>

  <input type="text" id="name[1]" value="zhangsan">

  <span>Sex:</span>

  <input type="text" id="sex[1]" value="female">

  <span>Chinese:</span>

  <input type="text" id="chinese[1]" value="96">

  <span>Math:</span>

  <input type="text" id="math[1]" value="94">

  <span>English:</span>

  <input type="text" id="english[1]" value="98">

  <br>

  </form>

  </center>

  <script type="text/javascript">

  var marks = [

  {

  name: 'Lisi',

  sex: 'Female',

  chinese: '88',

  math: '90',

  english: '92'

  },

  {

  name: 'Wangwu',

  sex: 'Female',

  chinese: '92',

  math: '80',

  english: '82'

  },

  {

  name: 'Lilei',

  sex: 'Female',

  chinese: '93',

  math: '88',

  english: '87'

  },

  {

  name: 'HanMeimei',

  sex: 'Male',

  chinese: '97',

  math: '92',

  english: '100'

  },

  {

  name: 'Wangjuan',

  sex: 'Male',

  chinese: '92',

  math: '93',

  english: '90'

  }

  ];

  function addto(index,name,sex,chinese,math,english) {

  "insert into marks (nodename,innerHTML) values ('span','Name:')".ForDOM().execute();

  ("insert into marks (nodename,type,id,value) values ('input','text','name[" + (index) + "]','" + name + "')").ForDOM().execute();

  "insert into marks (nodename,innerHTML) values ('span','Sex:')".ForDOM().execute();

  ("insert into marks (nodename,type,id,value) values ('input','text','sex[" + (index) + "]','" + sex + "')").ForDOM().execute();

  "insert into marks (nodename,innerHTML) values ('span','Chinese:')".ForDOM().execute();

  ("insert into marks (nodename,type,id,value) values ('input','text','chinese[" + (index) + "]','" + chinese + "')").ForDOM().execute();

  "insert into marks (nodename,innerHTML) values ('span','Math:')".ForDOM().execute();

  ("insert into marks (nodename,type,id,value) values ('input','text','math[" + (index) + "]','" + math + "')").ForDOM().execute();

  "insert into marks (nodename,innerHTML) values ('span','English:')".ForDOM().execute();

  ("insert into marks (nodename,type,id,value) values ('input','text','english[" + (index) + "]','" + english + "')").ForDOM().execute();

  ("insert into marks (nodename) values ('br')").ForDOM().execute();

  };

  for(var i=0; i<marks.length;i++) {

  addto(i+2,marks[i].name,marks[i].sex,marks[i].chinese,marks[i].math,marks[i].english);

  };

  function insertline() {

  var count = "select count(*) as Count from marks where id like 'name%'".ForDOM().query();

  var index = count[0].Count + 1;

  addto(index,"","","","","");

  };

  function dellastline() {

  var count = "select count(*) as Count from marks where id like 'name%'".ForDOM().query();

  var index = count[0].Count;

  ("delete from marks where id like '%["+ index +"]'").ForDOM().execute();

  };

  "create table savedmarks".execute();

  function savemarks() {

  var names = ("select value from marks where id like 'name%'").ForDOM().query();

  var sexs = ("select value from marks where id like 'sex%'").ForDOM().query();

  var chineses = ("select value from marks where id like 'chinese%'").ForDOM().query();

  var maths = ("select value from marks where id like 'math%'").ForDOM().query();

  var englishs = ("select value from marks where id like 'english%'").ForDOM().query();

  "delete from savedmarks".execute();

  for(var i=0;i<names.length;i++) {

  ("insert into savedmarks (name,sex,chinese,math,english) values ('"+ names[i].value +"','" + sexs[i].value + "'," + chineses[i].value + "," + maths[i].value + "," + englishs[i].value + ")").execute();

  };

  //alert(savedmarks);

  };

  function orderby(field,asc) {

  savemarks();

  var marks = ("select * from savedmarks order by " + field + " " + asc).query();

  "delete from marks".ForDOM().execute();

  for(var i=0; i<marks.length;i++) {

  addto(i+2,marks[i].name,marks[i].sex,marks[i].chinese,marks[i].math,marks[i].english);

  };

  };

  function order() {

  var byfield = document.getElementById("byfield").value;

  var ascdesc = document.getElementById("ascdesc").value;

  orderby(byfield,ascdesc);

  };

  </script>

  </body>

  </html>

  主要用到四个JS库,其中YESBRAIN.js是基库,JSQL.js是接口。JSQL-Memory.js和JSQL-DOM分别是JSQL对 javascript Objects Array 和 Html DOM 的 SQL 实现。

  jsql javascript