asp删除mssql数据库中没有记录的图片代码

<%@ language="vbscript"%> 
<%response.Expires = 0%> 
<!--#include file="conn.asp"--> 
<% 
Dim objFSO,objFolder,objFile,FF '声明 objFSO 变量存放对象实例 
FF = Server.MapPath("pro_s/") 
Set objFSO = Server.CreateObject("Scripting.FileSystemObject") 
If objFSO.FolderExists(ff) Then 
Response.write "文件夹 "&ff&" 里所有的文件：<br>" 
Set objFolder = objFSO.GetFolder(ff) 

For Each objFile in objFolder.Files 
%> 
    <% 
        filename=cstr(objFile.name) 
        myname=split(filename,".") 
        ffname=myname(0) 
        a=0 
        set sclass=conn.execute("select img from wksc_pro ") 
        do while not sclass.eof 

        result=Instr(sclass("img"),ffname) 
        a=a+result 
        if(a>0) then 
            exit do 
        end if 

        sclass.movenext 
        loop 
        if(a=0) then 
        response.Write ""&objFile&"" 
        response.Write"<br>" 
        objFile.delete 

        end if 
    %> 
<% 
Next 
Else 
Response.Write "文件夹"&ff&"不存在，无法读取相关信息！" 
End If 
Set objFolder = Nothing 
Set objFSO = Nothing '释放 FileSystemObject 对象实例内存空间 
%>