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ASP.NET Server Side Handler for HTML5 Valums Ajax file Upload

, 27 May 2011 CPOL
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Implementation of ASP.NET handler for Valums ajax upload; A HTML 5 file uploader supports multiple file upload with progress bar, drag-and-drop


This Ajax uploader uses XHR for uploading multiple files with progress-bar in FF3.6+, Safari4+, Chrome and falls back to hidden iframe based upload in other browsers, providing good user experience everywhere. You can also see PHP demo in Valums site at



The current implementation has server side handler for Java, PHP and Perl. But ASP.NET handler does not exist. Here, I have implemented an ASP.NET handler for Ajax file upload that supports Internet Explorer, Firefox and Chrome. 

Using the Code

The problem is that Internet Explorer uses context.Request.Files[] for sending file to server. But Firefox and Chrome use Context.Request.InputStream. So in handler, you need to check both for reading stream.

For Firefox and Chrome, you get fileName from header like:

String filename = HttpContext.Current.Request.Headers["X-File-Name"];

Code that works in Firefox and Chrome is as follows:

//This works for Firefox and Chrome.
Stream inputStream = 
HttpContext.Current.Request.InputStream;<br />FileStream fileStream = new 
FileStream(mapPath + "\\" + filename, 

context.Response.Write("{success:true, name:\"" + filename + "\", path:\"" + 
path + "/" + filename + "\"}");

But for Internet Explorer, you need to use:

HttpPostedFile uploadedfile = context.Request.Files[0];

Code that works for Internet Explorer browser is:

HttpPostedFile uploadedfile = context.Request.Files[0];
 filename = uploadedfile.FileName;
uploadedfile.SaveAs(mapPath + "\\" + filename);
 context.Response.Write("{success:true, name:\"" + filename + "\", path:\"" + 
path + "/" + filename + "\"}");

Here the response is sent as JSON string and you will get JSON object as response. You need to send {success:true} to make Ajax upload understand that file upload is successful, otherwise you can send false


  • 27th May, 2011: Initial post


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

Software Developer
Bangladesh Bangladesh
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I am now working as software engineer in Malaysia. I am from Bangladesh and I have completed my B.Sc (Engg.) in CSE from Rajshahi University of Engineering and Technology (RUET).I spend much time in learning latest technology.

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Comments and Discussions

Questionphoto.jpg 200 Kb failed PinmemberNDOGN6-Aug-13 1:13 
QuestionIE Crashes PinmemberFarnaz_Farnaz18-Apr-13 6:33 
QuestionIs it possible to select mutiple files at the same time [modified] PinmemberTravelthrprog9-Apr-13 5:32 
Questionit runs differently in IE9 PinmemberMember 33679062-Apr-13 21:52 
Questionupload successfully but.... PinmemberAlenty18-Oct-12 3:22 
GeneralMy vote of 5 PinmemberNoName_ark10-May-12 9:04 
BugFix for IE - invalid path PinmemberMember 86106163-May-12 4:47 
Questioni con't run the project Pinmembersenthilkumarpsk8-Mar-12 3:25 
AnswerRe: i can't run the project Pinmemberpimpers14-Sep-12 3:47 
GeneralMy vote of 5 PinmemberMember 332085211-Feb-12 6:43 
QuestionI can't get the filename [modified] PinmemberLamJason14-Dec-11 4:57 
AnswerRe: I can't get the filename PinmemberSyed BASHAR14-Dec-11 7:28 
GeneralMy vote of 3 PinmemberJepy21-Oct-11 0:19 
QuestionFileName Pinmembergooroo.Net19-Oct-11 6:06 
QuestionSaving to database PinmemberKiran Volety10-Sep-11 6:24 
AnswerRe: Saving to database PinmemberSyed BASHAR10-Sep-11 7:02 
GeneralMy vote of 5 PingroupSaraf Talukder22-Aug-11 4:20 
QuestionWorked like a charm... PinmemberMember 802384516-Aug-11 20:34 
Questionfile size & remove button Pinmemberyefriend27-Jul-11 19:05 
AnswerRe: file size & remove button PinmemberSyed BASHAR29-Jul-11 11:02 
QuestionThanks! PinmemberBigJoe71416-Jul-11 11:01 
AnswerRe: Thanks! PinmemberMember 332085211-Feb-12 6:42 
Questionfile size Pinmemberseverous260002-Jul-11 6:09 
AnswerRe: file size [modified] PinmemberSyed BASHAR7-Aug-11 22:46 
GeneralRe: file size [modified] Pinmemberjalalbabaei26-May-12 3:04 

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