《无组件上传文件》|萝卜系统下载站

我只是照搬过来的，我也是刚找到。我自己还没看明白源码呢。：） 
你只有自己修改了。我把整个网页一起贴过来吧。谁英文好翻译一下。 
一页贴不下，分两页。 
Upload Form 
Usually, you use an HTML FORM to submit data from the browser to the web server. That form can contain text fields, checkbox, button and also a file type control to upload files. The user fills in the form with his data and submits the form to the server. 
 
The enctype attribute of the <FORM> element specifies the content type used to encode the form data set for submission to the server. The enctype attribute used by default is " application/x-www-form-urlencoded ". However, that enctype is inefficient for sending large quantities of text, text containing non-ASCII characters or binary data to the server. The content type " multipart/form-data " should be used to submit forms in case of file uploading. Actually, it can be used to submit files and binary data. 
 
A " multipart/form-data " message contains a series of parts, where each part is expected to contain: 
 
a Content-Disposition header whose value is " form-data " 
a name attribute specifying the control name. 
For a file type control, the part contains some more information: 
 
a filename attribute specifying the original path and file name on the client 
a Content-Type header of the binary data control sent. 
Those headers are followed by the binary or text content of the control. 
 
The following example illustrates " multipart/form-data " encoding. The client would have this form in the browser: 
 
<FORM METHOD="POST" ENCTYPE="multipart/form-data" ACTION="upload.asp"> 
<INPUT TYPE="Text" NAME="email" VALUE="PhCollignon@email.com"> 
<INPUT TYPE="file" NAME="blob"> 
<INPUT TYPE="submit" NAME="Enter"> 
</FORM> 
 
 
 
If this form is submitted, the following request can be read on the server: 
 
-----------------------------7cf87224d2020a 
Content-Disposition: form-data; name="email" 
 
PhCollignon@email.com 
-----------------------------7cf87224d2020a 
Content-Disposition: form-data; name="blob"; filename="c:\image.gif" 
Content-Type: image/pjpeg 
 
ÿØÿàJFIFHHÿÛC… 
…ÿÙ 
-----------------------------7cf87224d2020a 
Content-Disposition: form-data; name="Enter" 
 
Submit Query 
-----------------------------7cf87224d2020a-- 
 
That content can be displayed if it is sent back as a response to the client. The binary data should be read and written with Request.binaryRead and Response.binaryWrite methods. 
 
<% 
Response.BinaryWrite(Request.BinaryRead(Request.TotalBytes)) 
%> 
 
You can see that parts of the response are delimited by boundaries: 
 
-----------------------------7cf87224d2020a 
 
and the last boundary is followed by: ' -- ' 
 
 
There is one Content-Disposition for each control. The name attribute identifies the control sent by the HTML form (email, blob and Enter). For a file type control (blob), the file name is also part of Content-Disposition header and, a Content-Type header gives the content type of the binary data.

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