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Posted 27 May 2011

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 Pin
NDOGN6-Aug-13 1:13
memberNDOGN6-Aug-13 1:13 
QuestionIE Crashes Pin
Farnaz_Farnaz18-Apr-13 6:33
memberFarnaz_Farnaz18-Apr-13 6:33 
QuestionIs it possible to select mutiple files at the same time Pin
Travelthrprog9-Apr-13 5:32
memberTravelthrprog9-Apr-13 5:32 
Questionit runs differently in IE9 Pin
Member 33679062-Apr-13 21:52
memberMember 33679062-Apr-13 21:52 
Questionupload successfully but.... Pin
Alenty18-Oct-12 3:22
memberAlenty18-Oct-12 3:22 
GeneralMy vote of 5 Pin
NoName_ark10-May-12 9:04
memberNoName_ark10-May-12 9:04 
BugFix for IE - invalid path Pin
Member 86106163-May-12 4:47
memberMember 86106163-May-12 4:47 
Questioni con't run the project Pin
senthilkumarpsk8-Mar-12 3:25
membersenthilkumarpsk8-Mar-12 3:25 
AnswerRe: i can't run the project Pin
pimpers14-Sep-12 3:47
memberpimpers14-Sep-12 3:47 
GeneralMy vote of 5 Pin
Member 332085211-Feb-12 6:43
memberMember 332085211-Feb-12 6:43 

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