【下载文档:  asp下实现多表单域无组件文件上传的实例.txt 】

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Asp下实现多表单域无组件文件上传的实例
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

'这里用来表示开始文件数据上传 File to send:

'这里用来表示文件数据结束

3。ASP文件 muploadfile.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)) 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 = true Response.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,3,3 Response.ContentType = rs("FileContentType")

lngOffset=0 conChunkSize=1024 lngPictSize=rs("FileContent").ActualSize Do While lngOffset < lngPictSize varChunk = rs("FileContent").GetChunk(conChunkSize) Response.BinaryWrite varChunk lngOffset = lngOffset + conChunkSize If lngOffset > lngPictSize Then Exit Do Loop rs.close set rs=Nothing conn.close set conn=nothing %>

就是这些了，希望此方法对大家能有所帮助。：）