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How to add, delete, modify and check the database in js

怪我咯

Jul 07, 2017 pm 03:01 PM

javascriptdatabase

JavaScriptOperation database JS operates Access database, which is similar to other language operations. I have summarized the custom code. Friends who need it can refer to

JavaScript operation database JS operates Access database, follow The operations in other languages are similar. I have summarized the custom codes for reference only.
Now there is a file abc.mdf on the F drive, the table name is Student, there are 2 fields in total, Id numeric type primary key, stuName text type, now add, delete, modify and check the table:
1. Query

The code is as follows:

<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. Add operation

The code is as follows:

<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+",&#39;"+stuName+"&#39;)"; 
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=&#39;#f4f4f4&#39;> 
<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.Delete operation

Copy code The code is as follows:

<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. Modification operation

The code is as follows:

<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=&#39;" + userName + "&#39; where Id=" + userId + ""; 
conn.execute(sql); 
conn.close(); 
conn = null; 
alert("修改成功"); 
} 
</script> 
<BODY> 
<table width=100 border=1> 
<tr bgcolor=&#39;#f4f4f4&#39;> 
<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>

In addition, JS can also operate SQL Server database
The database name is: MySchool, the table name is Student, StudentId is int type, auto-increment column, studentName is the student name, which is varchar type. The database user name is sa and the password is ok.

The code is as follows:

<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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