菜鸟学ADO实例教程之ADO 更新记录
类别: ASP教程 
我们可以使用SQL UPDATE 命令来更新数据库中的记录。
我们想更新数据库webjx中的一个表Customers中的一个记录，首先我们把表Customers中的所有记录显 示出来。
<html>
<body>
<%
set conn=Server.CreateObject("ADODB.Connection")
conn.Provider="Microsoft.Jet.OLEDB.4.0"
conn.Open "e:/webjx/webjx.mdb"
set rs=Server.CreateObject("ADODB.Recordset")
rs.open "SELECT * FROM customers",conn
%>
<h2>List Database</h2>
<table border="1" width="100%">
<tr>
<%
for each x in rs.Fields
response.write("<th>" & ucase(x.name) & "</th>")
next
%>
</tr>
<% do until rs.EOF %>
<tr>
<form method="post" action="demo_update.asp">
<%
for each x in rs.Fields
if lcase(x.name)="customerid" then%>
<td>
<input type="submit" name="customerID" value="<%=x.value%>">
</td>
<%else%>
<td><%Response.Write(x.value)%></td>
<%end if
next
%>
</form>
<%rs.MoveNext%>
</tr>
<%
loop
conn.close
%>
<br/>
</table>
</body>
</html>
当用户点击了 "customerID" 按钮就要调用"demo_update.asp":
<html>
<body>
<h2>Update Record</h2>
<%
set conn=Server.CreateObject("ADODB.Connection")
conn.Provider="Microsoft.Jet.OLEDB.4.0"
conn.Open "e:/webjx/webjx.mdb"
cid=Request.Form("customerID")
if Request.form("companyname")="" then
set rs=Server.CreateObject("ADODB.Recordset")
rs.open "SELECT * FROM customers WHERE customerID=\'" & cid & "\'",conn
%>
<form method="post" action="demo_update.asp">
<table>
<%for each x in rs.Fields%>
<tr>
<td><%=x.name%></td>
<td><input name="<%=x.name%>" value="<%=x.value% >"></td>
<%next%>
</tr>
</table>
<br /><br />
<input type="submit" value="更新记录">
</form>
<%
else
sql="UPDATE customers SET "
sql=sql & "companyname=\'" & Request.Form("companyname") & "\',"
sql=sql & "contactname=\'" & Request.Form("contactname") & "\',"
sql=sql & "address=\'" & Request.Form("address") & "\',"
sql=sql & "city=\'" & Request.Form("city") & "\',"
sql=sql & "postalcode=\'" & Request.Form("postalcode") & "\',"
sql=sql & "country=\'" & Request.Form("country") & "\'"
sql=sql & " WHERE customerID=\'" & cid & "\'"
on error resume next
conn.Execute sql
if err<>0 then
response.write("No update permissions!")
else
response.write("Record " & cid & " was updated!")
end if
end if
conn.close
%>
<br/>
</body>
</html>
我们想更新数据库webjx中的一个表Customers中的一个记录，首先我们把表Customers中的所有记录显 示出来。
<html>
<body>
<%
set conn=Server.CreateObject("ADODB.Connection")
conn.Provider="Microsoft.Jet.OLEDB.4.0"
conn.Open "e:/webjx/webjx.mdb"
set rs=Server.CreateObject("ADODB.Recordset")
rs.open "SELECT * FROM customers",conn
%>
<h2>List Database</h2>
<table border="1" width="100%">
<tr>
<%
for each x in rs.Fields
response.write("<th>" & ucase(x.name) & "</th>")
next
%>
</tr>
<% do until rs.EOF %>
<tr>
<form method="post" action="demo_update.asp">
<%
for each x in rs.Fields
if lcase(x.name)="customerid" then%>
<td>
<input type="submit" name="customerID" value="<%=x.value%>">
</td>
<%else%>
<td><%Response.Write(x.value)%></td>
<%end if
next
%>
</form>
<%rs.MoveNext%>
</tr>
<%
loop
conn.close
%>
<br/>
</table>
</body>
</html>
当用户点击了 "customerID" 按钮就要调用"demo_update.asp":
<html>
<body>
<h2>Update Record</h2>
<%
set conn=Server.CreateObject("ADODB.Connection")
conn.Provider="Microsoft.Jet.OLEDB.4.0"
conn.Open "e:/webjx/webjx.mdb"
cid=Request.Form("customerID")
if Request.form("companyname")="" then
set rs=Server.CreateObject("ADODB.Recordset")
rs.open "SELECT * FROM customers WHERE customerID=\'" & cid & "\'",conn
%>
<form method="post" action="demo_update.asp">
<table>
<%for each x in rs.Fields%>
<tr>
<td><%=x.name%></td>
<td><input name="<%=x.name%>" value="<%=x.value% >"></td>
<%next%>
</tr>
</table>
<br /><br />
<input type="submit" value="更新记录">
</form>
<%
else
sql="UPDATE customers SET "
sql=sql & "companyname=\'" & Request.Form("companyname") & "\',"
sql=sql & "contactname=\'" & Request.Form("contactname") & "\',"
sql=sql & "address=\'" & Request.Form("address") & "\',"
sql=sql & "city=\'" & Request.Form("city") & "\',"
sql=sql & "postalcode=\'" & Request.Form("postalcode") & "\',"
sql=sql & "country=\'" & Request.Form("country") & "\'"
sql=sql & " WHERE customerID=\'" & cid & "\'"
on error resume next
conn.Execute sql
if err<>0 then
response.write("No update permissions!")
else
response.write("Record " & cid & " was updated!")
end if
end if
conn.close
%>
<br/>
</body>
</html>
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