Asp多表單域無組件檔案上傳的例子

來源:互聯網
上載者:User
上傳|無組件

最近經常有人問到這類問題,在此轉貼一下,內容:
1。資料庫表結構(Access):
UserID:Text(儲存上傳檔案的使用者ID)
FileContentType:Text(用來儲存上傳檔案的類型,eg:"Application/msword",主要用來使使用者能正確下載此檔案)
FileContent:OLE Object(儲存檔案資料)

2。HTML檔案
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"> '這裡用來表示開始檔案資料上傳
File to send:

<INPUT TYPE="file" name="file_up" size="30"><br>
<INPUT TYPE="file" name="file_up" size="30"><br>
<input type=hidden name="FileUploadEnd"> '這裡用來表示檔案資料結束
<input type=submit value=Submit>
</Form></P><P>3。ASP檔案
muploadfile.asp</P><P><%
Response.Expires=0
Function bin2str(binstr)
    Dim varlen,clow,ccc,skipflag </P><P>    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 </P><P>
varByteCount = Request.TotalBytes
bnCRLF = chrB( 13 ) & chrB( 10 )
binHTTPHeader=Request.BinaryRead(varByteCount)       
Divider = LEFTB( binHTTPHeader,  INSTRB( binHTTPHeader, bnCRLF ) - 1 )</P><P>'開始讀非檔案域的資料
Do while lenB(binHTTPHeader)>46
   
    binHeaderData = LeftB(binHTTPHeader, INSTRB( binHTTPHeader, bnCRLF & bnCRLF )-1)
    strHeaderData=bin2str(binHeaderData)</P><P>    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)
   
        '判斷檔案資料時候開始
    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</P><P>    binFieldValue=MIDB( binHTTPHeader, DataStart, DataEnd )
    strFieldValue=bin2str(binFieldValue)
    strFieldValue=Trim(strFieldValue)
    strFieldValue=Replace(strFieldValue,vbcrlf,vbnullstring)</P><P>    '非檔案上傳域變數賦值
    execute strFieldName&"="""&strFieldValue&""""
   
       
    binHTTPHeader=MIDB(binHTTPHeader,INSTRB( DataStart + 1, binHTTPHeader, divider ))
       
loop</P><P>'開始處理檔案資料
Do while lenB(binHTTPHeader)>46
   
   
    binHeaderData = LeftB(binHTTPHeader, INSTRB( binHTTPHeader, bnCRLF & bnCRLF )-1)
       
    strHeaderData=bin2str(binHeaderData)
   
    '讀取上傳檔案的Content-Type
    lngFileContentTypeStart=Instr(strHeaderData,"Content-Type:")+Len("Content-Type:")
    strFileContentType=Trim(Mid(strHeaderData,lngFileContentTypeStart))
    strFileContentType=Replace(strFileContentType,vbCRLF,vbNullString)
   
    '讀取上傳的檔案名稱
    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)
   
    '讀取上傳檔案資料
    DataStart = INSTRB( binHTTPHeader, bnCRLF & bnCRLF ) + 4
    DataEnd = INSTRB( DataStart + 1, binHTTPHeader, divider ) - DataStart
   
    If strFileName<>"" Then
               
        binFieldValue=MIDB( binHTTPHeader, DataStart, DataEnd )
       
        '將上傳的檔案寫入資料庫
        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。下載使用者上傳的檔案
<%
Response.Buffer      = true
Response.Clear

UserID=request("UserID")</P><P>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")</P><P>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
%></P><P>就是這些了,希望此方法對大家能有所協助。:)



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