多表单域无组件文件上传的例子

最近经常有人问到这类问题,在此转贴一下,内容:


1。表结构(access(小型网站之最爱))：
userid:text(保存上传文件的用户id)
filecontenttype:text(用来保存上传文件的类型，eg:"application/msword"，主要用来使用户能正确下载此文件）
filecontent:ole object（保存文件数据）

2。html文件
mpreviousfile.htm
<form name="upload_file" enctype="multipart/form-data" action="mpreviousfile." method=post>
<input type=hidden name="userid" value="abc">
<input type=hidden name="fileuploadstart"> 这里用来表示开始文件数据上传
file to send: <br>
<input type="file" name="file_up" size="30"><br>
<input type="file" name="file_up" size="30"><br>
<input type=hidden name="fileuploadend"> 这里用来表示文件数据结束
<input type=submit value=submit>
</form>

3。asp文件
mpreviousfile.asp

<%
response.expires=0
function bin2str(binstr)
    dim varlen,clow,ccc,skipflag

    skipflag=0
    ccc = ""
    if not isnull(binstr) then
        varlen=lenb(binstr)
        for i=1 to varlen
            if skipflag=0 then
                clow = midb(binstr,i,1)
                if ascb(clow) > 127 then
                    ccc =ccc & chr(ascw(midb(binstr,i+1,1) & clow))
                    skipflag=1
                else
                    ccc = ccc & chr(ascb(clow))
                end if
            else
                skipflag=0
            end if
        next
    end if
    bin2str = ccc
end function


varbytecount = request.totalbytes
bncrlf = chrb( 13 ) & chrb( 10 )
binhttpheader=request.binaryread(varbytecount)        
divider = leftb( binhttpheader,  instrb( binhttpheader, bncrlf ) - 1 )

开始读非文件域的数据
do while lenb(binhttpheader)>46
    
    binheaderdata = leftb(binhttpheader, instrb( binhttpheader, bncrlf & bncrlf )-1)
    strheaderdata=bin2str(binheaderdata)

    lngfieldnamestart=instr(strheaderdata,"name="&chr(34))+len("name="&chr(34))