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Tip of the Day
Language: Visual Basic, Web
Expertise: Intermediate
Oct 22, 2002

Upload Files to Active Server Pages


This tip works with ASP/IIS 4.0 and up. Many companies sell ActiveX objects for uploading files to Active Server Pages. However, you can easily write a bit of VBScript to handle the uploads yourself. The Request object has all the uploaded data:
 
<!--
	HTML for the upload form
	'uploadform.html'
-->
<html><body>
<form action="upload.asp" method="post" _
enctype="multipart/form-data">
<input type=file name="file1" size=20><br>
<input type=file name="file2" size=20><br>
<input type=submit>
</body></html>

<!--
	ASP Code for the upload
	'upload.asp'
-->
<html><body>
<%
	' This code is needed to "initialize" the 
	' retrieved data
	Dim q
	q = Chr(34)
	' All data
	Dim aAllDataB, aAllData, x, aHdr
	aAllDataB = Request.BinaryRead(Request.TotalBytes)
	' It comes in as unicode, so convert it to ascii
	For x = 1 To LenB(aAllDataB)
		aAllData = aAllData & Chr(AscB(MidB( _
			aAllDataB, x, 1)))
	Next
	' The "header" is a unique string generated by the 
	' system to indicate the beginning
	' and end of file data
	aHdr = Left(aAllData, Instr(aAllData,vbCrLf)+1)
%>

<%
	' Here's where your code goes.
	' In this example, "file1" and "file2" are the 
	' field names specified within the form of the 
	' upload submission page.
	Response.Write "file1: Filename = " & _
		GetFilename("file1") & "<br>"
	Response.Write GetFileData("file1") _
& "<br><br>"

	Response.Write "file2: Filename = " & _
		GetFilename("file2") & "<br>"
	Response.Write GetFileData("file2") _
& "<br><br>"

	' Writing out the file data like this only looks 
	' OK when the uploaded file is some kind of text 
	' 
Matt Hart
 
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