js操作数据库

JavaScript操作数据库JS操作Access数据库，跟其他语言操作差不多，总结了一下习惯代码，仅供参考学习。
现在在F盘有文件abc.mdf，表名为Student，一共2个字段，Id数字类型主键，stuName文本类型，现对该表进行增删改查的操作：

1.查询
<HTML>
<HEAD>
<TITLE>数据查询</TITLE>
<Script >
var conn = new ActiveXObject("ADODB.Connection"); 
conn.Open("DBQ=f:\\abc.mdb;DRIVER={Microsoft Access Driver (*.mdb)};"); 
var rs = new ActiveXObject("ADODB.Recordset"); 
var sql="select * from Student"; 
rs.open(sql, conn); 
var html="";
while(!rs.EOF) 
{ 
   html=html+rs.Fields("Id")+" "+rs.Fields("stuName"); 
   rs.moveNext(); 
} 
document.write(html);
rs.close(); 
rs = null; 
conn.close(); 
conn = null; 
</script>
</HEAD>
<BODY>
</BODY>
</HTML>

2.增加操作
<HTML>
<HEAD>
<TITLE>增加操作</TITLE>
<script language="javascript"> 
function addUser(id,stuName) 
{ 
  //用 JavaScript 写服务器端连接数据库的代码示例 
  var conn = new ActiveXObject("ADODB.Connection"); 
  conn.Open("DBQ=F:\\abc.mdb;DRIVER={Microsoft Access Driver (*.mdb)};"); 
  var sql="insert into Student(ID,stuName) values("+id+",'"+stuName+"')"; 
try{
   conn.execute(sql); 
   alert("添加成功"); 
}
catch(e){
   document.write(e.description);
   alert("添加失败~~~");
}
conn.close(); 

} 
 </script> 
</HEAD>

<BODY>
<table width=100 border=1> 
   <tr bgcolor='#f4f4f4'>
    <td>编号</td>
    <td>姓名</td>
   </tr> 
   <tr>
    <td><input id="stuId" /></td> 
    <td><input id="stuName"/></td>
   </tr> 
</table> 
<input name="1" type="button" value="添加" onclick="addUser(stuId.value,stuName.value)"/>
</BODY>
</HTML>

3.删除操作
<HTML>
<HEAD>
<TITLE>删除操作</TITLE>
 <script language="javascript"> 
function delStu(id) 
{ 
   var conn = new ActiveXObject("ADODB.Connection"); 
   conn.Open("DBQ=F:\\abc.mdb;DRIVER={Microsoft Access Driver (*.mdb)};"); 
   var sql="delete from Student where Id=2"; 
   conn.execute(sql); 
   conn.close(); 
   conn = null; 
   alert("修改成功"); 
} 
</script>
</HEAD>

<BODY>
<input name="1" type="button" value="删除" onclick="delStu(1)"/> 
</BODY>
</HTML>

4.修改操作
<HTML>
<HEAD>
<TITLE>修改操作 </TITLE>
</HEAD>
<script> 
function updateUser(userId,userName) 
{ 
   var conn = new ActiveXObject("ADODB.Connection"); 
   conn.Open("DBQ=F:\\abc.mdb;DRIVER={Microsoft Access Driver (*.mdb)};"); 
   var rs = new ActiveXObject("ADODB.Recordset"); 
   var sql="update Student set stuName='" + userName + "' where Id=" + userId + ""; 
   conn.execute(sql); 
   conn.close(); 
   conn = null; 
   alert("修改成功"); 
} 
 </script> 
<BODY>
   <table width=100 border=1> 
   <tr bgcolor='#f4f4f4'>
    <td>编号</td>
    <td>姓名</td>
   </tr> 
   <tr>
    <td><input id="stuId" /></td> 
    <td><input id="stuName"/></td>
   </tr> 
</table> 
<input name="1" type="button" value="修改" onclick="updateUser(stuId.value,stuName.value)"/>
</BODY>
</HTML>

另外，JS也可以操作SQL Server数据库
数据库名为：MySchool，表名为Student，StudentId为int类型，自增列，studentName为学生姓名，为varchar类型。数据库用户名为sa，密码是ok，

<HTML>
<HEAD>
<TITLE>SQL数据查询</TITLE>
<Script >
var conn = new ActiveXObject("ADODB.Connection"); 
conn.Open("Driver={SQL server};Server=.;DataBase=MySchool;UID=sa;Password=ok;");//打开数据库
var rs = new ActiveXObject("ADODB.Recordset"); 
var sql="select * from Student"; 
rs.open(sql, conn); 
var html="";
while(!rs.EOF) 
{ 
   html=html+rs.Fields("StudentId")+" "+rs.Fields("studentName")+"<br/>"; 
   rs.moveNext(); 
} 
document.write(html);
rs.close(); 
rs = null; 
conn.close(); 
conn = null; 
</script>
</HEAD>

<BODY>
</BODY>
</HTML>
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