aspx接受aspx頁面的文件很簡單，用htmlinputfile,就可以了，但是如果接受html頁面post的文件
就不怎麼好辦了，我彷照asp的方法做法如下，自己測試通過，拿出來給大家共享，可以限制
文件內容，類型，大小，自定義存儲位置，在congfig.xml內
html頁的內容：（來自fckeditor）
<html>
<head>
<title>fckeditor - uploaders tests</title>
<script language="javascript">
function sendfile()
{
var suploaderurl = cmbuploaderurl.value ;
if ( suploaderurl.length == 0 )
suploaderurl = txtcustomurl.value ;
if ( suploaderurl.length == 0 )
{
alert( 'please provide your custom url or select a default one' ) ;
return ;
}
eurl.innerhtml = suploaderurl ;
txturl.value = '' ;
frmupload.action = suploaderurl ;
frmupload.submit() ;
}
function onuploadcompleted( errornumber, fileurl, filename, custommsg )
{
switch ( errornumber )
{
case 0 :// no errors
txturl.value = fileurl ;
alert( 'file uploaded with no errors' ) ;
break ;
case 1 :// custom error
alert( custommsg ) ;
break ;
case 10 :// custom warning
txturl.value = fileurl ;
alert( custommsg ) ;
break ;
case 201 :
txturl.value = fileurl ;
alert( 'a file with the same name is already available. the uploaded file has been renamed to "' + filename + '"' ) ;
break ;
case 202 :
alert( 'invalid file' ) ;
break ;
case 203 :
alert( "security error. you probably don't have enough permissions to upload. please check your server." ) ;
break ;
default :
alert( 'error on file upload. error number: ' + errornumber ) ;
break ;
}
}
</script>
</head>
<body>
<table cellspacing="0" cellpadding="0">
<tr>
<td>
<table cellspacing="0" cellpadding="0">
<tr>
<td nowrap >
select the "file uploader" to use:<br>
<select id="cmbuploaderurl" name="select1">
<option selected value="asp/upload.asp">asp</option>
<option value="php/upload.php">php</option>
<option value="upload.aspx?type=image">aspx</option>
</select>
</td>
<td nowrap > </td>
<td >
custom uploader url:<br>
<input id="txtcustomurl" disabled type="text">
</td>
</tr>
</table>
<br>
<table cellspacing="0" cellpadding="0">
<tr>
<td nowrap>
<form id="frmupload" target="uploadwindow" enctype="multipart/form-data" action="" method="post">
upload a new file:<br>
<input type="file" name="newfile"><br>
<input type="button" value="send it to the server" >
</form>
</td>
<td > </td>
<td valign="top">
uploaded file url:<br>
<input id="txturl" readonly type="text">
</td>
</tr>
</table>
<br>
post url: <span id="eurl"> </span>
</td>
</tr>
<tr>
<td>
<iframe name="uploadwindow"></iframe>
</td>
</tr>
</table>
</body>
</html>
upload.aspx的內容：
<%@ page language="c#" autoeventwireup="true" codefile="upload.aspx.cs" inherits="upload"%>
下面是後台代碼：
using system;
using system.data;
using system.configuration;
using system.collections;
using system.io;
using system.text;
using system.web;
using system.web.security;
using system.web.ui;
using system.web.ui.webcontrols;
using system.web.ui.webcontrols.webparts;
using system.web.ui.htmlcontrols;
using system.xml;
using system.collections.specialized;
public partial class upload : system.web.ui.page
{
public void sendresults(int errornumber, string fileurl, string filename, string custommsg)
{
stringbuilder text = new stringbuilder();
text.append("<script type=/"text/javascript/">");
text.append("window.parent.onuploadcompleted(" + errornumber + ",/"" + fileurl.replace("/"", "///"") + "/",/"" + filename.replace( "/"", "///"") + "/",/"" + custommsg.replace("/"", "///"") + "/") ;/n");
text.append(" </script>");
response.write(text.tostring());
response.end();
}
public void getconfig(string type, out string[] allowedext, out string[] denyedext,out string savepath,out long maxsize)
{
xmldocument doc = new xmldocument();
doc.load(server.mappath(@"./config.xml"));
xmlelement root=doc.documentelement;
xmlnodelist imagenodelist=root.getelementsbytagname(type);
allowedext = imagenodelist[0].firstchild.innertext.trim().split('|');
denyedext = imagenodelist[0].lastchild.innertext.trim().split('|');
savepath = root.getelementsbytagname("userpath").item(0).innertext.trim();
try
{
maxsize = convert.toint64(root.getelementsbytagname("maxsize").item(0).innertext.trim());
}
catch { maxsize = 10*1024; }
}
protected void page_load(object sender, eventargs e)
{
string[] allowedext = new string[] { }, denyedext = new string[] { };
string savepath = string.empty;
long maxsize = 10000;
string type = request.querystring["type"];
if(type!=null&&type!=string.empty)
type=type.tolower();
else
type="file";
if (type == "image")
{
getconfig("image", out allowedext, out denyedext, out savepath,out maxsize);
}
if (type == "file")
{
getconfig("file", out allowedext, out denyedext, out savepath, out maxsize);
}
if (type == "flash")
{
getconfig("flash", out allowedext, out denyedext, out savepath, out maxsize);
}
if (savepath == string.empty||savepath=="")
savepath = "~/userfiles/";
if(!savepath.endswith("/"))savepath+="/";
/************************************************* ********************************
byte[] bytes1 = system.text.encoding.default.getbytes("這是字符串/n/n/n/n");
byte[] bytes2 = new byte[] { 1, 33, 23, 3, 0, 56, 55, 235, 5 };//二進制數
byte[] bytes = new byte[bytes1.length + bytes2.length];
//合併二進制流
memorystream ms = new memorystream(bytes);
ms.write(bytes1, 0, bytes1.length);
ms.write(bytes2, 0, bytes2.length);
int count = 0, pos = 0;
//開始找四個'/n'
for (int i = 0; i < bytes.length; i++)
{
if (bytes[i] == (int)'/n')
{
count++;
if (count == 4)
{
pos -= 4;
break;
}
}
}
if (count == 4)
{
//這裡，bytes字節數組裡從0 到pos 的位置就是你要的字符串
//從pos + 5 開始到最後，就是你要的二進制
}
************************************************** ********************************/
byte[] filedata, formdata;
formdata = request.binaryread(request.contentlength);
string head = string.empty;
encoding encoding = encoding.utf8;
long pos = 0;
for (long i = 0; i < formdata.longlength; i++)
{
if (formdata[i] == (byte)'/r' && formdata[i + 1] == (byte)'/n' && formdata[i + 2] == (byte)'/r' && formdata[ i + 3] == (byte)'/n')
{
pos = i;
break;
}
}
if (pos == 0) { response.end(); return; }
head = encoding.getstring(formdata, 0, (int)pos);
filedata = new byte[formdata.longlength - pos - 3];
array.copy(formdata, pos + 4, filedata, 0, formdata.longlength - pos - 4);
/************************************************* ***********************************************
//傳來的表單形式是：
//"-----------------------------7d5fa3820f84/r/ncontent-disposition: form-data; name=/"newfile/ "; filename=/"f://documents//4(10995).jpg/"/r/ncontent-type: image/pjpeg/r/n/r/n
//後面是文件數據
************************************************** **********************************************/
head = head.tolower();
head = head.remove(0, head.indexof("/r/n") + 2);
head = head.replace("/"", "");
string postfilename = string.empty;
string filename;//no path
string filetype, fileext;
postfilename = head.substring(0, head.indexof("/r/n"));//content-disposition: form-data; name=/"newfile/"; filename=/"f://documents// 4(10995).jpg/"
filetype = head.remove(0, postfilename.length + 3);//returns:content-type: image/pjpeg
postfilename = postfilename.substring(postfilename.indexof("filename=") + "filename=".length);//c:/path/name
filename = path.getfilename(postfilename);
fileext = filename.substring(filename.lastindexof(".") + 1);
if (filedata.longlength > maxsize) {
sendresults(2, resolveurl(savepath + filename), filename, "too large");
return;
}
bool isallow=false;
foreach(string ext in denyedext){
if (ext == fileext) {
isallow = false;
sendresults(202, resolveurl(savepath + filename), filename, "forrbiden");
return;
}
}
foreach (string ext in allowedext) {
if (ext == fileext) { isallow = true; break; }
}
if ( isallow)
{
string tmppath = server.mappath(savepath);
if (!directory.exists(tmppath)) {
try
{
directory.createdirectory(tmppath);
}
catch { sendresults(200, resolveurl(savepath + filename), filename, "沒有寫入權限"); }
}
//response.binarywrite(filedata);
filestream savefilestream= new filestream(tmppath+filename, filemode.openorcreate, fileaccess.readwrite);
for (long i = 0; i < filedata.longlength; i++)
{
savefilestream.writebyte(filedata[i]);
}
savefilestream.close();
sendresults(0, resolveurl(savepath + filename), filename, "no errors");
}
}
}
config.xml
<?xml version="1.0" encoding="utf-8"?>
<upload>
<enabled>true</enabled>
<userpath></userpath>
<maxsize>500000</maxsize><!--unit is byte-->
<file>
<allow>zip|rar</allow>
<deny>php|php3|php5|phtml|asp|aspx|ascx|jsp|cfm|cfc|pl|bat|exe|dll|reg|cgi</deny>
</file>
<image>
<allow>jpg|gif|jpeg|png|bmp</allow>
<deny></deny>
</image>
<flash>
<allow>swf|fla</allow>
<deny></deny>
</flash>
</upload>