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关于图片上传的例子在网上有很多文章和原代码。但是每次上论坛浏览帖子的时候都是看到很多网友对图片上传感到头疼和麻烦。其实这个问题也是曾经让我感到头疼。也看过了不少的文章和代码。现在我写的这篇文章是把我比较喜欢的一篇代码和动网里的高手对这篇代码优化后再加上我增加一些代码结合出来的！呵呵，其实这篇文章是沾了写这篇代码的人(稻香居士)和动网里那些高手的光。:)
好了，不说废话了。开始来搭建所需要的环境和数据结构！
先新建一个名字叫photo的文件夹。(我在这里就是把图片上传到这个文件夹里的。)建立一个名字叫database的数据库。再接着建立一个名字叫sfile的表。表里设计四个字段分别是id(int),image(varchar),image1(varchar),image2(varchar)。我这里用的数据库是sql。
相关的文件
register.asp
<html>
<head>
<title>文件</title>
<meta http-equiv="content-type" content="text/html; charset=gb2312">
</head>
<body>
<form name="form1" method="post" action="save.asp">
<table width="50%" border="1" cellspacing="0" cellpadding="0" align="center">
<tr>
<td width="20%"><a href="#" onclick="javascript:window.open(/reg_upload.asp,null, left=40%,top=40%,height=250,width=470,status=yes,toolbar=no,menubar=no,resizable=yes,copyhistory=yes,scrollbars=yes,location=no,status=no,titlebar=no)">图片上传</a></td>
<td width="80%">
<input type="text" name="myface">
<input type="text" name="myface1">
<input type="text" name="myface2">
(此处用户不必填图片上传后自动生成) </td>
</tr>
<tr>
<td colspan="2" align="center">
<input type="submit" name="submit" value="提交">
<input type="reset" name="submit2" value="重设">
</td>
</tr>
</table>
</form>
</body>
</html>
reg_upload.asp
<html>
<head>
<title></title>
<meta http-equiv="content-type" content="text/html; charset=gb2312">
<link rel="stylesheet" href="css/style.css" type="text/css">
</head>
<body leftmargin="0" topmargin="0" >
<br>
<br>
<br>
<table width="90%" border="0" align="center" bgcolor="#000000" height="152" cellspacing="1">
<tr>
<td height="34" align="center" bgcolor="#ffffff"><font color="#ffff33"><b><font size="4" color="#000000">选择图片</font></b></font></td>
</tr>
<tr>
<td bgcolor="#ffffff">
<form name="form" method="post" action="upfile.asp" enctype="multipart/form-data" >
<input type="hidden" name="filepath" value="photo">
<input type="hidden" name="act" value="upload">
<input type="file" name="file1" size="30"><br>
<input type="file" name="file2" size="30"><br>
<input type="file" name="file3" size="30">
<input type="submit" name="submit" value="粘 贴" class="tl">
</form>
</td>
</tr>
</table>
</body>
</html>
upfile.asp
<!–#include file="upload.inc"–>
<html>
<head>
<title>文件上传</title>
</head>
<body>
<%
dim arr(3)
dim upload,file,formname,formpath,icount,filename,fileext,i
set upload=new upload_5xsoft 建立上传对象
formpath=upload.form("filepath")
在目录后加(/)
if right(formpath,1)<>"/" then formpath=formpath&"/"
icount=0
i=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<0 then
response.write "<font size=2>请先选择你要上传的图片 [ <a href=# onclick=history.go(-1)>重新上传</a> ]</font>"
response.end
end if
if file.filesize>100000 then
response.write "<font size=2>图片大小超过了限制 [ <a href=# onclick=history.go(-1)>重新上传</a> ]</font>"
response.end
end if
if fileext<>".gif" and fileext<>".jpg" then
response.write "<font size=2>文件格式不对 [ <a href=# onclick=history.go(-1)>重新上传</a> ]</font>"
response.end
end if
fileext=lcase(right(file.filename,4))
filename=formpath&year(now)&month(now)&day(now)&hour(now)&minute(now)&second(now)&file.filename
arr(i)=filename
i=i+1
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
response.write file.filepath&file.filename&" ("&file.filesize&") => "&formpath&file.filename&" 成功!<br>"
icount=icount+1
end if
set file=nothing
next
if instr(arr(0),".")=0 and instr(arr(1),".")=0 and instr(arr(2),".")=0 then
response.write "<font size=2>请先选择你要上传的图片 [ <a href=# onclick=history.go(-1)>重新上传</a> ]</font>"
response.end
end if
if instr(arr(0),".")<>0 then
response.write "<script>opener.document.forms[0].myface.value=" & arr(0) & "</script>"
else
response.write "<script>opener.document.forms[0].myface.value=</script>"
end if
if instr(arr(1),".")<>0 then
response.write "<script>opener.document.forms[0].myface1.value=" & arr(1) & "</script>"
else
response.write "<script>opener.document.forms[0].myface1.value=</script>"
end if
if instr(arr(2),".")<>0 then
response.write "<script>opener.document.forms[0].myface2.value=" & arr(2) & "</script>"
else
response.write "<script>opener.document.forms[0].myface2.value= </script>"
end if
set upload=nothing 删除此对象
session("upface")="done"
htmend icount&" 个文件上传结束!"
sub htmend(msg)
set upload=nothing
response.write "<html><head><meta http-equiv=refresh content=3 url=""javascript:window.close();""></head><body><center><br><br>文件上传成功<br>谢谢你的支持！<br>本窗口三秒后自动关闭</center></body></html>"
response.end
end sub
%>
</body>
</html>
upload.inc
<script runat=server language=vbscript>
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>
save.asp
<% dim dsn,conn
dsn="driver={sql server};server=127.0.0.1;uid=sa;pwd=;database=database"
set conn=server.createobject("adodb.connection")
conn.open dsn
%>
<% dim file,file1,file2
file=trim(request.form("myface"))
file1=trim(request.form("myface1"))
file2=trim(request.form("myface2"))
set rs=server.createobject("adodb.recordset")
sql="insert into sfile(image,image1,image2) values("& file &","& file1&","& file2&")"
conn.execute(sql)
response.redirect "ok.asp"
%>
呵呵，代码多了点。复制以上的代码到你的机器上运行是不是你想要的结果！至于显示图片相信大家都明白了吧！我就不必多说了。值得一提的是此代码不仅可以用于图片上传而是任何格式的文件都可以哦，至于文件大小也可以由你自己来定义哦！还有的就是我只定义了上传三个要是要上传更多的话稍为改下代码就可以了。仔细看代码就知道了是不是觉得很方便和实用。这个只不过是在我解决这个问题的时候用的一种方法而已。你要是有更好的方法来实现也可以来email告诉我！互相学习共同进步。第一次写文章可能表达方面有语法问题。要是有什么问题也可以来email告诉我！我的邮箱：hushuowang@163.net,qq:11313112。时间不早了，我要睡觉了！呼噜呼噜zzzzzz….
(特别感谢hooke等高手一直以来的技术支持)小汪仔于2002/5/26晚
