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JSQL 基于客户端的成绩统计实现方法

　　本文标签：JSQL,成绩统计

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