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ADO 删除记录


我们可以使用 SQL DELETE 命令删除数据库表中的记录。


删除表中的记录

我们想要删除 Northwind 数据库中 Customers 表中的记录。我们首先创建一个表来列出 Customers 表中的所有记录。

<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>列出数据库</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 if
next
%>
</form>
<%rs.MoveNext%>
</tr>
<%
loop
conn.close
%>
</table>

</body>
</html>


如果用户点击“customerID”列中的按钮,他或她将被带到一个名为“demo_delete.asp”的新文件。“demo_delete.asp”文件包含关于如何根据数据库表中的一条记录的字段创建输入字段的源代码。它还包含一个“删除记录”按钮,该按钮将删除当前记录。

<html>
<body>

<h2>删除记录</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="删除记录">
  </form>
<%
else
  sql="DELETE FROM customers"
  sql=sql & " WHERE customerID='" & cid & "'"
  on error resume next
  conn.Execute sql
  if err<>0 then
    response.write("没有更新权限!")
  else
    response.write("记录 " & cid & " 已删除!")
  end if
end if
conn.close
%>

</body>
</html>

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