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。数据库表结构(Access)：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muploadfile.htm<Form name="upload_file" enctype="multipart/form-data" action="muploadfile.asp" 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muploadfile.asp

<%Response.Expires=0Function 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.TotalBytesbnCRLF = 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))    lngFieldNameEnd=Instr(lngFieldNameStart,strHeaderData,chr(34))            strFieldName=Mid(strHeaderData,lngFieldNameStart,lngFieldNameEnd-lngFieldNameStart)    strFieldName=Trim(strFieldName)    strFieldName=Replace(strFieldName,vbcrlf,vbnullstring)            '判断文件数据时候开始    If strComp(strFieldName,"FileUploadStart",1)=0 Then        binHTTPHeader=MIDB(binHTTPHeader,INSTRB( DataStart + 1, binHTTPHeader, divider ))        exit do    End if        DataStart = INSTRB( binHTTPHeader, bnCRLF & bnCRLF ) + 4     DataEnd = INSTRB( DataStart + 1, binHTTPHeader, divider ) - DataStart

    binFieldValue=MIDB( binHTTPHeader, DataStart, DataEnd )    strFieldValue=bin2str(binFieldValue)    strFieldValue=Trim(strFieldValue)    strFieldValue=Replace(strFieldValue,vbcrlf,vbnullstring)

    '非文件上传域变量赋值    execute strFieldName&"="""&strFieldValue&""""                binHTTPHeader=MIDB(binHTTPHeader,INSTRB( DataStart + 1, binHTTPHeader, divider ))        loop

'开始处理文件数据Do while lenB(binHTTPHeader)>46            binHeaderData = LeftB(binHTTPHeader, INSTRB( binHTTPHeader, bnCRLF & bnCRLF )-1)            strHeaderData=bin2str(binHeaderData)        '读取上传文件的Content-Type    lngFileContentTypeStart=Instr(strHeaderData,"Content-Type:")+Len("Content-Type:")    strFileContentType=Trim(Mid(strHeaderData,lngFileContentTypeStart))    strFileContentType=Replace(strFileContentType,vbCRLF,vbNullString)        '读取上传的文件名    lngFileNameStart=Instr(strHeaderData,"filename="&chr(34))+Len("filename="&chr(34))    lngFileNameEnd=Instr(lngFileNameStart,strHeaderData,chr(34))    strFileName=Mid(strHeaderData,lngFileNameStart,lngFileNameEnd-lngFileNameStart)    strFileName=Trim(strFileName)    strFileName=Replace(strFileName,vbCRLF,vbNullString)        '读取上传文件数据    DataStart = INSTRB( binHTTPHeader, bnCRLF & bnCRLF ) + 4     DataEnd = INSTRB( DataStart + 1, binHTTPHeader, divider ) - DataStart        If strFileName<>"" Then                        binFieldValue=MIDB( binHTTPHeader, DataStart, DataEnd )                '将上传的文件写入数据库        set conn = Server.CreateObject("ADODB.Connection")        conn.Open "DSN=abc"                SQL="select * from User_File"        set rs=server.CreateObject("ADODB.Recordset")        rs.Open sql,conn,3,3        rs.addnew        rs("UserID")=UserID        rs("FileContentType")=strFileContentType        rs("FileContent").AppendChunk binFieldValue        rs.update        rs.close        set rs=Nothing        conn.Close        set conn=Nothing            End if        binHTTPHeader=MIDB(binHTTPHeader,INSTRB( DataStart + 1, binHTTPHeader, divider ))    loop%>

4。下载用户上传的文件<%Response.Buffer      = trueResponse.Clear

UserID=request("UserID")

Set conn=server.createobject("adodb.connection")set rs=server.createobject("adodb.recordset")conn.open "DSN=UploadFile"rs.open "select * from User_File where UserID='"&UserID&"'",conn,3,3Response.ContentType = rs("FileContentType")

lngOffset=0conChunkSize=1024lngPictSize=rs("FileContent").ActualSizeDo While lngOffset < lngPictSize  varChunk = rs("FileContent").GetChunk(conChunkSize)  Response.BinaryWrite varChunk  lngOffset = lngOffset + conChunkSize  If lngOffset > lngPictSize Then Exit DoLoop

rs.closeset rs=Nothingconn.closeset conn=nothing%>

就是这些了，希望此方法对大家能有所帮助。：）