We may use the SQL DELETE command to delete a record in a table in a database.
我们可以使用DELETE命令来删除数据库表单中的一条记录。
Delete a Record in a Table
删除表单中的一条记录
We want to delete a record in the Customers table in the Northwind database. We first create a table that lists all records in the Customers table:
我们希望删除“Northwind”数据库中“Customers”表单中的一条记录。首先，我们需要创建一个表单，并在其内列出所有 “Customers”表单中的记录信息：
<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 if
next
%>
</form>
<%rs.MoveNext%>
</tr>
<%
loop
conn.close
%>
</table> </body>
</html> |
If the user clicks on the button in the "customerID" column he or she will be taken to a new file called "demo_delete.asp". The "demo_delete.asp" file contains the source code on how to create input fields based on the fields from one record in the database table. It also contains a "Delete record" button that will delete the current record:
如果用户点击“customerID”列中的按钮，那么它将会打开一个新的名为“demo_update.asp”的文件。“demo_update.asp”文件中包含了“基于数据库中的一条记录所对应的字段来创建一个输入域”的源代码以及一个“删除记录[Delete record]”的按钮（可以通过它删除当前的记录信息）：
<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 if
conn.close
%> </body>
</html> |
繁體中文
ADO 中的 ADO删除记录
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