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
%>