JSQL 基于客户端的成绩统计实现方法

时间:2020-05-12 人气:0

<!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

加载全部内容