ASP Classic在Paramaterized查询命名参数：必须声明标量变量

问题描述

我试着写ASP经典参数化查询，和它的开始觉得我打我的头撞墙。我得到了以下错误：

I would swear that is what the hello line does, but maybe i'm missing something...

<% OPTION EXPLICIT %>
<!-- #include file="../common/adovbs.inc" -->
<%

    Response.Buffer=false

    dim conn,connectionString,cmd,sql,rs,parm

    connectionString = "Provider=SQLOLEDB.1;Integrated Security=SSPI;Data Source=.\sqlexpress;Initial Catalog=stuff"
    set conn = server.CreateObject("adodb.connection")
    conn.Open(connectionString)

    set cmd = server.CreateObject("adodb.command")
    set cmd.ActiveConnection = conn
    cmd.CommandType = adCmdText
    cmd.CommandText = "select @something"
    cmd.NamedParameters = true
    cmd.Prepared = true
    set parm = cmd.CreateParameter("@something",advarchar,adParamInput,255,"Hello")
    call cmd.Parameters.append(parm)
    set rs = cmd.Execute
    if not rs.eof then
    	Response.Write rs(0)
    end if


%>

解决方案

Here's some sample code from an MSDN Library article on preventing SQL injection attacks. I cannot find the original URL, but googling the title keywords (Preventing SQL Injections in ASP) should get you there quick enough. Hope this real-world example helps.

strCmd = "select title, description from books where author_name = ?"
Set objCommand.ActiveConnection = objConn
objCommand.CommandText = strCmd
objCommand.CommandType = adCmdText
Set param1 = objCommand.CreateParameter ("author", adWChar, adParamInput, 50)
param1.value = strAuthor
objCommand.Parameters.Append param1
Set objRS = objCommand.Execute()

See the following page on MSDN, near the bottom, referring specifically to named parameters.

MSDN example

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