ADO 删除记录
我们可使用 SQL 的 DELETE 命令来删除数据库表中的某条记录。
删除表中的记录
我们希望删除 Northwind 数据库的 Customers 表中的一条记录。首先我们需要创建一个表格，来列出 Customers 中的所有记录。
<html><body><%set conn=Server.CreateObject("ADODB.Connection")conn.Provider="Microsoft.Jet.OLEDB.4.0"conn.Open "c:/webdata/northwind.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_delete.asp"><%for each x in rs.Fields if x.name="customerID" then%> <td> <input type="submit" name="customerID" value="<%=x.value%>"> </td> <%else%> <td><%Response.Write(x.value)%></td> <%end ifnext%></form><%rs.MoveNext%></tr><%loopconn.close%></table></body></html>假如用户点击 "customerID" 列中的按钮，会打开新文件 "demo_delete.asp"。此文件包含了创建输入域的源代码，这些输入域基于数据库中记录的字段，同时也含有一个删除当前记录的“删除按钮”：
<html><body><h2>Delete Record</h2><%set conn=Server.CreateObject("ADODB.Connection")conn.Provider="Microsoft.Jet.OLEDB.4.0"conn.Open "c:/webdata/northwind.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_delete.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="Delete record"> </form><%else sql="DELETE FROM customers" 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 deleted!") end if end ifconn.close%></body></html>
