asp无组件上传图片 动态保存文件名 upload.inc逐句翻译

先上解释代码，后面跟上实用inc代码及调用方法
<SCRIPT RUNAT=SERVER LANGUAGE=VBSCRIPT>
dim upfileStream
Class upload '类名
dim Form,File
Private Sub Class_Initialize '私有 的子程序 类在初始化的时候调用这个子程序 
dim iStart,iFileNameStart,iFileNameEnd,iEnd,vbEnter,iFormStart,iFormEnd,theFile
dim strDiv,mFormName,mFormValue,mFileName,mFileSize,mFilePath,iDivLen,mStr
if Request.TotalBytes<1 then Exit Sub '如无数据上传则退出
set Form=CreateObject("Scripting.Dictionary")    '创建两个dictionary对象(类似二维数组) form file和upfilestream ADO对象
set File=CreateObject("Scripting.Dictionary")    
set upfileStream=CreateObject("Adodb.Stream")  '创建流数据对象
upfileStream.mode=3 '对流可以读写权限
upfileStream.type=1 '流为二进制
upfileStream.open '打开流
upfileStream.write Request.BinaryRead(Request.TotalBytes) '向upfileStream中写入从上一页面POST过来的所有数据'

vbEnter=Chr(13)&Chr(10) '回车换行分隔符'
iDivLen=inString(1,vbEnter)+1    '1为起始位置，返回找到第一个回车换行分隔符的位置+1'
strDiv=subString(1,iDivLen) '提取从位置1开始 长度为IDIVLEN长度的数据'
iFormStart=iDivLen                                        '表单内容开始的position'
iFormEnd=inString(iformStart,strDiv)-1                '内容结束的位置为从第一个换行符结束位置开始找到下一个换行符内容的位置 -源头0位置
while iFormStart < iFormEnd '当有数据存在
  iStart=inString(iFormStart,"name=""")   '找到name="  的开始位置
  iEnd=inString(iStart+6,"""")   '找到name 值之后的 " 的位置
  mFormName=subString(iStart+6,iEnd-iStart-6) '提取中间name的值 
  iFileNameStart=inString(iEnd+1,"filename=""") '同上找到filename="  的开始位置
  if iFileNameStart>0 and iFileNameStart<iFormEnd then    '如果找到filename= " 
       iFileNameEnd=inString(iFileNameStart+10,"""")  '找结束 " 位置"
       mFileName=subString(iFileNameStart+10,iFileNameEnd-iFileNameStart-10) '提取filename的值
       iStart=inString(iFileNameEnd+1,vbEnter&vbEnter)  '+1 表示后面的空格
       iEnd=inString(iStart+4,vbEnter&strDiv)  '+4表示换行分隔符长度加上 找到下一个结束分隔符的位置
           if iEnd>iStart then  '如果有文件内容
            mFileSize=iEnd-iStart-4   '得到文件大小  为结束position-开始position-换行符长度（因为文件按二进制保存所以长度等于文件大小）
           else
            mFileSize=0   '没有文件内容  文件大小为0
           end if
       set theFile=new FileInfo   '初始化新的类
       theFile.FileName=getFileName(mFileName) '类里面的变量赋值 
       theFile.FilePath=getFilePath(mFileName) 
       theFile.FileSize=mFileSize
       theFile.FileStart=iStart+4
       theFile.FormName=FormName   'file1

       dim inputStart,inputEnd,inputName,inputNameStart,inputNameEnd,inputvalue
 inputStart=inString(iEnd+iDivLen,"name=""")
 inputEnd=inString(inputStart+6,"""")
theFile.inputName=subString(inputStart+6,inputEnd-inputStart-6)
 inputNameStart=inputEnd+1
 inputNameEnd=inString(inputNameStart+1,vbEnter&strDiv)
 response.write inputNameStart&inputNameEnd
 theFile.inputvalue=subString(inputNameStart,inputNameEnd-inputNameStart)
        file.add mFormName,theFile  '给file 这个dictionary增加key mFormName 值item  为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   '给form 这个dictionary增加key mFormName 值item  为mFormValue空值
  end if

  iFormStart=iformEnd+iDivLen
  iFormEnd=inString(iformStart,strDiv)-1
wend
End Sub

Private Function subString(theStart,theLen)  '提取从参1位置开始 长度theLen长度的数据
 dim i,c,stemp
 upfileStream.Position=theStart-1
 stemp=""
 for i=1 to theLen
   if upfileStream.EOS then Exit for
   c=ascB(upfileStream.Read(1))
   If c > 127 Then
    if upfileStream.EOS then Exit for
    stemp=stemp&Chr(AscW(ChrB(AscB(upfileStream.Read(1)))&ChrB(c)))
    i=i+1
   else
    stemp=stemp&Chr(c)
   End If
 Next
 subString=stemp
End function

Private Function inString(theStart,varStr) '两个参数 开始position 和直到查询到varStr字符串，返回从参数1到查询到的位置的长度
 dim i,j,bt,theLen,str
 InString=0   '初始化
 Str=toByte(varStr)     '将varStr转化为二进制格式数据
 theLen=LenB(Str)   '获取varStr的字节数 
 for i=theStart to upfileStream.Size-theLen   '从参1开始，到 stream流的总大小减去 参2的长度
   if i>upfileStream.size then exit Function  '如果流为空之类的小于参1 则退出FUN
   upfileStream.Position=i-1 '因为流的位置从0开始算，所以要从开始位置-1
   if AscB(upfileStream.Read(1))=AscB(midB(Str,1)) then  判断如果流中位置1的字元和str中位置1的字元相同，
    InString=i    '则返回值为开始位置参数1加上相同时的位置
    for j=2 to theLen
      if upfileStream.EOS then '判断是否为流结束
        inString=0
        Exit for
      end if
      if AscB(upfileStream.Read(1))<>AscB(MidB(Str,j,1)) then '如果不相同则返回0
        InString=0
        Exit For
      end if
    next
    if InString<>0 then Exit Function '找到了就退出，不会继续往下找
   end if
 next
End Function

Private Sub Class_Terminate  '当CLASS类被关闭时调用这个子程序 关闭并清空
  form.RemoveAll
  file.RemoveAll
  set form=nothing
  set file=nothing
  upfileStream.close
  set upfileStream=nothing
End Sub

Private function GetFilePath(FullPath)   '获取上传文件的路径
  If FullPath <> "" Then
   GetFilePath = left(FullPath,InStrRev(FullPath, ""))  'InStrRev 从后往前遍历找到   离最后的位置，也就是数量a ，获取从左往右a个数据
  Else
   GetFilePath = ""
  End If
 End  function
 
 Private function GetFileName(FullPath)
  If FullPath <> "" Then
   GetFileName = mid(FullPath,InStrRev(FullPath, "")+1)  '先获取  之后的数据
  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 = ""    '初始化变量
    FilePath = ""
    FileSize = 0
    FileStart= 0
    FormName = ""
  End Sub
  
 Public function SaveAs(FullPath)
     FullPath=upfileStream.inputvalue
    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
    upfileStream.position=FileStart-1
    upfileStream.copyto dr,FileSize
    dr.SaveToFile FullPath,2
    dr.Close
    set dr=nothing 
    SaveAs=0
  end function
End Class
</SCRIPT>

以上代码只为解释可能有错，实用代码如下：

<SCRIPT RUNAT=SERVER LANGUAGE=VBSCRIPT>
dim upfileStream
Class upload
dim Form,File,inputval
Private Sub Class_Initialize 
dim iStart,iFileNameStart,iFileNameEnd,iEnd,vbEnter,iFormStart,iFormEnd,theFile
dim strDiv,mFormName,mFormValue,mFileName,mFileSize,mFilePath,iDivLen,mStr
if Request.TotalBytes<1 then Exit Sub
set Form=CreateObject("Scripting.Dictionary")
set File=CreateObject("Scripting.Dictionary")
set upfileStream=CreateObject("Adodb.Stream")
upfileStream.mode=3
upfileStream.type=1
upfileStream.open
upfileStream.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
   inputStart=inString(iEnd+iDivLen,"name=""")
 inputEnd=inString(inputStart+6,"""")
inputName=subString(inputStart+6,inputEnd-inputStart-6)
 inputNameStart=inputEnd+1
 inputNameEnd=inString(inputNameStart+1,vbEnter&strDiv)
inputvalue=subString(inputNameStart+4,inputNameEnd-inputNameStart-4)
inputval=inputvalue
   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
 upfileStream.Position=theStart-1
 stemp=""
 for i=1 to theLen
   if upfileStream.EOS then Exit for
   c=ascB(upfileStream.Read(1))
   If c > 127 Then
    if upfileStream.EOS then Exit for
    stemp=stemp&Chr(AscW(ChrB(AscB(upfileStream.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 upfileStream.Size-theLen
   if i>upfileStream.size then exit Function
   upfileStream.Position=i-1
   if AscB(upfileStream.Read(1))=AscB(midB(Str,1)) then
    InString=i
    for j=2 to theLen
      if upfileStream.EOS then 
        inString=0
        Exit for
      end if
      if AscB(upfileStream.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
  upfileStream.close
  set upfileStream=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,InStr(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
    upfileStream.position=FileStart-1
    upfileStream.copyto dr,FileSize
    dr.SaveToFile FullPath,2
    dr.Close
    set dr=nothing 
    SaveAs=0
  end function
End Class
</SCRIPT>

以下为调用页面：

<%@LANGUAGE="VBSCRIPT" CODEPAGE="65001"%>
<%Session.CodePage=65001
Response.CodePage=65001
Response.Charset = "UTF-8"%>
<!-- #include file="upload.inc" -->
<%
set nowupload=new upload
set file=nowupload.file("file1")
if file.fileSize>0 and file.filesize<1000000 then
    ''获取inPut里面的文件名
filename=nowupload.inputval
     filenameend=file.filename
    filenameend=split(filenameend,".")
    if filenameend(1)="gif" or filenameend(1)="jpg" then
        filename1=split(filename,".")(0)&"."&filenameend(1)
        file.saveAs Server.mappath(filename1)

''''''somecodes''''''

%>

实现方法：

1在需要上传图片的地方插入一个iframe

<iframe id="addgoodsframe" frameborder="0" scrolling="auto" style="float:left; border:0px dotted #f00; 196px; height:296px; position:absolute; padding:0px;" src="uploadpic_frame.asp?filename=abc">

</iframe>

2在uploadpic_frame.asp里面插入form 如：

<form id="addgoodspicform" class="addgoodspicform" name="addgoodspicform" enctype='multipart/form-data' method="post" 
action="uploadmodpic.asp">
    <input type=file name="file1" class="upload_file1" size="4" onchange="document.getElementById('upfile_text').value=this.value" />
<input type="hidden" value="" id="uploadpicsrc" />
<input type="text" class="ipt_text" id="upfile_text" disabled="disabled" />
<input name="filename" value="<%=Request.QueryString("filename")%>" type="hidden"/>
<button style="margin-top:0px; margin-left:5px;">选择图片</button><input type=submit name="submit" value="修 改" class="submit"></form>

3在uploadmodpic.asp页面应用inc

<%@LANGUAGE="VBSCRIPT" CODEPAGE="65001"%>
<%Session.CodePage=65001
Response.CodePage=65001
Response.Charset = "UTF-8"%>
<!-- #include file="upload.inc" -->
<%
set nowupload=new upload
set file=nowupload.file("file1")
if file.fileSize>0 and file.filesize<1000000 then
    ''获得input里面的文件名
filename=nowupload.inputval
     filenameend=file.filename
    filenameend=split(filenameend,".")
    if filenameend(1)="gif" or filenameend(1)="jpg" then
        filename1=split(filename,".")(0)&"."&filenameend(1)
        file.saveAs Server.mappath(filename1)

''''''somecodes连接数据库等''''''

%>