SlickUpload - ASP.NET Upload Component & File Upload Control
SlickUpload provides scalable ASP.NET upload handling with a rich progress and status
information display. SlickUpload intercepts upload requests before ASP.NET can process
them, enabling it to stream the files directly to the filesystem or a database with
little overhead. For user feedback, SlickUpload provides information that can be
displayed to the user in real time using AJAX techniques.
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Supported Environments
Browser
IE 6+
FF 1.5+
Safari 2+
Opera 9+
Client OS
Windows
OS X
Linux
.NET Framework
.NET 1.1, 2.0, 3.0, 3.5
Server OS
Windows 2000, 2003, 2008
IIS Version
IIS 5, 6, 7
Personal/Nonprofit Licenses
We offer licenses for nonprofits and hobbyists at a discount, or even free. Visit our
personal/nonprofit questionnaire
to see if you qualify.
MS MVP/Regional Directors
We offer free licenses to Microsoft MVPs and Regional Directors. Visit our
MS MVP/RD License Program page for more information.
Why not use the built-in ASP.NET upload support?
ASP.NET (v1.x) doesn't have any capacity to stream requests, and thus will load
an entire upload into memory before processing it. This can cause scalability problems,
as well as opening up a possible vulnerability to a denial of service (DOS) attack.
SlickUpload fixes these problems by intercepting the upload request before the ASP.NET
page processing engine gets it, and streaming it in chunks directly to disk or to
a database. This eliminates the problem of loading the request into memory.
SlickUpload also adds the capability to monitor upload progress during an upload.
This gives you the ability to display progress information to users, giving them
progress feedback in real time.
Advantage overview
- Scalable ASP.NET uploading by streaming directly to disk or database rather than loading
the entire upload in memory as ASP.NET 1.x does
- Rich AJAX progress feedback to the user that allows them to see status in real time
- Highly customizable architecture that lets you hook in at any point to add business
rules or logic
- Built for high-availablity and scalability from the ground up
- Supports web farm and web garden architectures for uploads and associated progress
information
Benefits
Scalability and Performance
By streaming uploads directly to an output stream in chunks, rather than loading
them into memory, SlickUpload achieves a level of scalability and performance impossible
to reach with ASP.NET's built-in functionality.
Flexibility
SlickUpload allows you to direct an upload to its final destination as it is being
uploaded, whether that be a file or a record in a database, rather than requiring
you to write to a file first and then manually move data around.
Ease of use
SlickUpload is a drop-in component with minimal coding required to do most tasks.
For complex tasks, SlickUpload has the depth of functionality required.
Rich end-user experience
Because the upload is integrated with a progress information service, SlickUpload
is able to provide an end user with detailed data about where he is in the upload
process and how long it will take to complete it.
Features
SlickUpload's design goal is to make ASP.NET uploads painless, while also providing
a rich, scalable solution. SlickUpload is built to make both easy and advanced tasks
as straightforward as possible. To satisfy these goals, SlickUpload provides the following
features:
Full VS.NET designer support
The UploadManager control and related controls provide a simple one-step way to
add rich, powerful, scalable, and reliable upload handling to your solution.
AJAX progress bar display
An AJAX progress bar and status display comes standard with SlickUpload. It provides
rich progress information and recovers gracefully from errors, including max length
exceeded errors that cause competing products to crash.
Request Filtering
It is extremely simple to specify a handler that SlickUpload will call to determine
whether or not to handle a given request. This makes integrating SlickUpload into
existing sites or frameworks such as dotNetNuke a snap.
Custom Filename/Criteria Generation
SlickUpload allows you to specify a handler that will generate the filename or database
criteria on the fly as a file is being uploaded, avoiding the necessity to upload
a file to one location, and then rename or move it.
Web Farm/Web Garden support
SlickUpload fully supports web farms and web gardens through its state manager framework.
RFC 1867 upload handling and MIME parsing
SlickUpload is built around a highly scalable custom MIME parser that supports standard
uploads, as well as malformed uploads delivered by several offending browsers. This
parser handles uploads from the standard ASP.NET HttpInputFile upload control.
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