js 如何實(shí)現(xiàn)對數(shù)據(jù)庫的增刪改查
2024-05-06 14:20:49
供稿：網(wǎng)友
JavaScript操作數(shù)據(jù)庫JS操作Access數(shù)據(jù)庫，跟其他語言操作差不多，總結(jié)了一下習(xí)慣代碼，僅供參考學(xué)習(xí)。
現(xiàn)在在F盤有文件abc.mdf，表名為Student，一共2個(gè)字段，Id數(shù)字類型主鍵，stuName文本類型，現(xiàn)對該表進(jìn)行增刪改查的操作：
1.查詢
代碼如下:
<HTML>
<HEAD>
<TITLE>數(shù)據(jù)查詢</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
代碼如下:
<HTML>
<HEAD>
<TITLE>增加操作</TITLE>
<script language="javascript">
function addUser(id,stuName)
{
//用 JavaScript 寫服務(wù)器端連接數(shù)據(jù)庫的代碼示例
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("添加失敗~~~");
}
conn.close();
}
</script>
</HEAD>
<BODY>
<table width=100 border=1>
<tr bgcolor='#f4f4f4'>
<td>編號</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.刪除操作
代碼如下:
<HTML>
<HEAD>
<TITLE>刪除操作</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="刪除" onclick="delStu(1)"/>
</BODY>
</HTML>
4.修改操作
代碼如下:
<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)};");
