关于无组件文件上传的文章已经很多了，所以在这里我不想再解释无组件文件上传的原理。在ASP中无法将二进制文件数据直接保存成文件，所以我们一般还是利用数据库来保存用户上传的文件。

style="PADDING-RIGHT: 10px; DISPLAY: block; PADDING-LEFT: 10px; PADDING-BOTTOM: 0px; PADDING-TOP: 0px">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）

style="PADDING-RIGHT: 10px; DISPLAY: block; PADDING-LEFT: 10px; PADDING-BOTTOM: 0px; PADDING-TOP: 0px">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>

style="PADDING-RIGHT: 10px; DISPLAY: block; PADDING-LEFT: 10px; PADDING-BOTTOM: 0px; PADDING-TOP: 0px">3。ASP文件

muploadfile.asp

style="PADDING-RIGHT: 10px; DISPLAY: block; PADDING-LEFT: 10px; PADDING-BOTTOM: 0px; PADDING-TOP: 0px"><%

Response.Expires=0

Function bin2str(binstr)

Dim varlen,clow,ccc,skipflag

style="PADDING-RIGHT: 10px; DISPLAY: block; PADDING-LEFT: 10px; PADDING-BOTTOM: 0px; PADDING-TOP: 0px">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

style="PADDING-RIGHT: 10px; DISPLAY: block; PADDING-LEFT: 10px; PADDING-BOTTOM: 0px; PADDING-TOP: 0px">

varByteCount = Request.TotalBytes

bnCRLF = chrB( 13 ) & chrB( 10 )

binHTTPHeader=Request.BinaryRead(varByteCount)

Divider = LEFTB( binHTTPHeader, INSTRB( binHTTPHeader, bnCRLF ) - 1 )

style="PADDING-RIGHT: 10px; DISPLAY: block; PADDING-LEFT: 10px; PADDING-BOTTOM: 0px; PADDING-TOP: 0px">'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)

style="PADDING-RIGHT: 10px; DISPLAY: block; PADDING-LEFT: 10px; PADDING-BOTTOM: 0px; PADDING-TOP: 0px">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

style="PADDING-RIGHT: 10px; DISPLAY: block; PADDING-LEFT: 10px; PADDING-BOTTOM: 0px; PADDING-TOP: 0px">binFieldValue=MIDB( binHTTPHeader, DataStart, DataEnd )

strFieldValue=bin2str(binFieldValue)

strFieldValue=Trim(strFieldValue)

strFieldValue=Replace(strFieldValue,vbcrlf,vbnullstring)

style="PADDING-RIGHT: 10px; DISPLAY: block; PADDING-LEFT: 10px; PADDING-BOTTOM: 0px; PADDING-TOP: 0px">'非文件上传域变量赋值

execute strFieldName&"="""&strFieldValue&""""





binHTTPHeader=MIDB(binHTTPHeader,INSTRB( DataStart + 1, binHTTPHeader, divider ))



loop

style="PADDING-RIGHT: 10px; DISPLAY: block; PADDING-LEFT: 10px; PADDING-BOTTOM: 0px; PADDING-TOP: 0px">'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

%>

style="PADDING-RIGHT: 10px; DISPLAY: block; PADDING-LEFT: 10px; PADDING-BOTTOM: 0px; PADDING-TOP: 0px">4。下载用户上传的文件

<%

Response.Buffer = true

Response.Clear

style="PADDING-RIGHT: 10px; DISPLAY: block; PADDING-LEFT: 10px; PADDING-BOTTOM: 0px; PADDING-TOP: 0px">UserID=request("UserID")

style="PADDING-RIGHT: 10px; DISPLAY: block; PADDING-LEFT: 10px; PADDING-BOTTOM: 0px; PADDING-TOP: 0px">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")

style="PADDING-RIGHT: 10px; DISPLAY: block; PADDING-LEFT: 10px; PADDING-BOTTOM: 0px; PADDING-TOP: 0px">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

style="PADDING-RIGHT: 10px; DISPLAY: block; PADDING-LEFT: 10px; PADDING-BOTTOM: 0px; PADDING-TOP: 0px">rs.close

set rs=Nothing

conn.close

set conn=nothing

%>