无组件上传图片之文件采用方案

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无组件上传图片之文件采用方案

作者:未知时间:2005-01-11 12:12 出处:Blog 责编:MyFAQ

摘要：暂无

首先，图片在页面中能查找选择。设计表单页面index.asp和上传选择页upload.asp，upload.asp在index.asp中以iframe包含。

其次，所选图片应能上传到某文件夹。建立一文件夹uploadimg

最后，传上去的图片应如何引用？很显然，采用UBB立即显示。upload.asp的指向对象upfile.asp具有写入UBB标签的功能。

图片上传采用稻香老农的无组件上传。所以upload.inc文件必不可少。

1，upload.inc（拷贝以下文本框的所有代码）

dim upfile_5xSoft_Stream

Class upload_5xSoft
  
dim Form,File,Version
  
Private Sub Class_Initialize 
        dim iStart,iFileNameStart,iFileNameEnd,iEnd,vbEnter,iFormStart,iFormEnd,theFile
        dim strDiv,mFormName,mFormValue,mFileName,mFileSize,mFilePath,iDivLen,mStr
        Version=""
        if Request.TotalBytes<1 then Exit Sub
        set Form=CreateObject("Scripting.Dictionary")
        set File=CreateObject("Scripting.Dictionary")
        set upfile_5xSoft_Stream=CreateObject("Adodb.Stream")
        upfile_5xSoft_Stream.mode=3
        upfile_5xSoft_Stream.type=1
        upfile_5xSoft_Stream.open
        upfile_5xSoft_Stream.write Request.BinaryRead(Request.TotalBytes)
        
        vbEnter=Chr(13)&Chr(10)
        iDivLen=inString(1,vbEnter)+1
        strDiv=subString(1,iDivLen)
        iFormStart=iDivLen
        iFormEnd=inString(iformStart,strDiv)-1
        while iFormStart < iFormEnd
          iStart=inString(iFormStart,"name=""")
          iEnd=inString(iStart+6,"""")
          mFormName=subString(iStart+6,iEnd-iStart-6)
          iFileNameStart=inString(iEnd+1,"filename=""")
          if iFileNameStart>0 and iFileNameStart<iFormEnd then
           iFileNameEnd=inString(iFileNameStart+10,"""")
           mFileName=subString(iFileNameStart+10,iFileNameEnd-iFileNameStart-10)
           iStart=inString(iFileNameEnd+1,vbEnter&vbEnter)
           iEnd=inString(iStart+4,vbEnter&strDiv)
           if iEnd>iStart then
            mFileSize=iEnd-iStart-4
           else
            mFileSize=0
           end if
           set theFile=new FileInfo
           theFile.FileName=getFileName(mFileName)
           theFile.FilePath=getFilePath(mFileName)
           theFile.FileSize=mFileSize
           theFile.FileStart=iStart+4
           theFile.FormName=FormName
           file.add mFormName,theFile
          else
           iStart=inString(iEnd+1,vbEnter&vbEnter)
           iEnd=inString(iStart+4,vbEnter&strDiv)
        
           if iEnd>iStart then
            mFormValue=subString(iStart+4,iEnd-iStart-4)
           else
            mFormValue="" 
           end if
           form.Add mFormName,mFormValue
          end if
        
          iFormStart=iformEnd+iDivLen
          iFormEnd=inString(iformStart,strDiv)-1
        wend
End Sub

Private Function subString(theStart,theLen)
 dim i,c,stemp
 upfile_5xSoft_Stream.Position=theStart-1
 stemp=""
 for i=1 to theLen
   if upfile_5xSoft_Stream.EOS then Exit for
   c=ascB(upfile_5xSoft_Stream.Read(1))
   If c > 127 Then
    if upfile_5xSoft_Stream.EOS then Exit for
    stemp=stemp&Chr(AscW(ChrB(AscB(upfile_5xSoft_Stream.Read(1)))&ChrB(c)))
    i=i+1
   else
    stemp=stemp&Chr(c)
   End If
 Next
 subString=stemp
End function

Private Function inString(theStart,varStr)
 dim i,j,bt,theLen,str
 InString=0
 Str=toByte(varStr)
 theLen=LenB(Str)
 for i=theStart to upfile_5xSoft_Stream.Size-theLen
   if i>upfile_5xSoft_Stream.size then exit Function
   upfile_5xSoft_Stream.Position=i-1
   if AscB(upfile_5xSoft_Stream.Read(1))=AscB(midB(Str,1)) then
    InString=i
    for j=2 to theLen
      if upfile_5xSoft_Stream.EOS then 
        inString=0
        Exit for
      end if
      if AscB(upfile_5xSoft_Stream.Read(1))<>AscB(MidB(Str,j,1)) then
        InString=0
        Exit For
      end if
    next
    if InString<>0 then Exit Function
   end if
 next
End Function

Private Sub Class_Terminate  
  form.RemoveAll
  file.RemoveAll
  set form=nothing
  set file=nothing
  upfile_5xSoft_Stream.close
  set upfile_5xSoft_Stream=nothing
End Sub
   
 
 Private function GetFilePath(FullPath)
  If FullPath <> "" Then
   GetFilePath = left(FullPath,InStrRev(FullPath, "\"))
  Else
   GetFilePath = ""
  End If
 End  function
 
 Private function GetFileName(FullPath)
  If FullPath <> "" Then
   GetFileName = mid(FullPath,InStrRev(FullPath, "\")+1)
  Else
   GetFileName = ""
  End If
 End  function

Private function toByte(Str)
   dim i,iCode,c,iLow,iHigh
   toByte=""
   For i=1 To Len(Str)
   c=mid(Str,i,1)
   iCode =Asc(c)
   If iCode<0 Then iCode = iCode + 65535
   If iCode>255 Then
     iLow = Left(Hex(Asc(c)),2)
     iHigh =Right(Hex(Asc(c)),2)
     toByte = toByte & chrB("&H"&iLow) & chrB("&H"&iHigh)
   Else
     toByte = toByte & chrB(AscB(c))
   End If
   Next
 End function
End Class

Class FileInfo
  dim FormName,FileName,FilePath,FileSize,FileStart
  Private Sub Class_Initialize 
    FileName = ""
    FilePath = ""
    FileSize = 0
    FileStart= 0
    FormName = ""
  End Sub
  
 Public function SaveAs(FullPath)
    dim dr,ErrorChar,i
    SaveAs=1
    if trim(fullpath)="" or FileSize=0 or FileStart=0 or FileName="" then exit function
    if FileStart=0 or right(fullpath,1)="/" then exit function
    set dr=CreateObject("Adodb.Stream")
    dr.Mode=3
    dr.Type=1
    dr.Open
    upfile_5xSoft_Stream.position=FileStart-1
    upfile_5xSoft_Stream.copyto dr,FileSize
    dr.SaveToFile FullPath,2
    dr.Close
    set dr=nothing 
    SaveAs=0
  end function
End Class
</SCRIPT>

[Ctrl+A 全部选择提示：你可先修改部分代码，再按运行]

2，表单页面index.asp。注意包含的上传选择页upload.asp

3，上传选择页upload.asp 注意： enctype="multipart/form-data"

4，最后一个文件 upfile.asp 主要作用：生成图片名，并将图片上传，同样也要将UBB标签写入index.asp中的textarea中。
（拷贝以下文本框的所有代码）

formPath=upload.form("filepath")
 ''在目录后加(/)
 if right(formPath,1)<>"/" then formPath=formPath&"/"

response.write "<body>"

iCount=0
for each formName in upload.file ''列出所有上传了的文件
 set file=upload.file(formName)  ''生成一个文件对象
 if file.filesize<100 then
     response.write "请选择你要上传的文件　[ <a href=# onclick=history.go(-1)>重新上传</a> ]"
    response.end
 end if
     
 if file.filesize>100*1000 then
     response.write "文件大小超过了限制100K　[ <a href=# onclick=history.go(-1)>重新上传</a> ]"
    response.end
 end if

fileExt=lcase(right(file.filename,4))
 uploadsuc=false
Forum_upload="gif,jpg,png"
 Forumupload=split(Forum_upload,",")
 for i=0 to ubound(Forumupload)
    if fileEXT="."&trim(Forumupload(i)) then
    uploadsuc=true
    exit for
    else
    uploadsuc=false
    end if
 next
 if uploadsuc=false then
     response.write "文件格式不正确　[ <a href=# onclick=history.go(-1)>重新上传</a> ]"
    response.end
 end if

randomize
 ranNum=int(90000*rnd)+10000
 filename=formPath&year(now)&month(now)&day(now)&hour(now)&minute(now)&second(now)&ranNum&fileExt

if file.FileSize>0 then         ''如果 FileSize > 0 说明有文件数据
  file.SaveAs Server.mappath(FileName)   ''保存文件
    for i=0 to ubound(Forumupload)
        if fileEXT="."&trim(Forumupload(i)) then
         response.write "<script>parent.form_name.cn_content.value+='<img src=""&FileName&"" hspace=3 vspace=1>'</script>"
        exit for
        end if
    next
 iCount=iCount+1
 end if
 set file=nothing
next
set upload=nothing  ''删除此对象

Htmend iCount&" 个文件上传结束!"

sub HtmEnd(Msg)
 set upload=nothing

response.write "上传成功 [ <a href=# onclick=history.go(-1)>继续上传</a>]"
 response.end
end sub

%>
</body>
</html>

[Ctrl+A 全部选择提示：你可先修改部分代码，再按运行]

当然，保持图片的文件夹uploadimg不能少

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