Ajax Uploader allows you to select and upload multiple files at once rather than having to select and upload each file individually.
Client side validation of the file size/type before uploading
Client side validation of file size/types prior to uploading the files to a server to increase usability and reduce consumption of network and server resources.
Hi-Performance with optimized memory usage
By streaming uploads directly to an output stream, rather than loading them into memory, Ajax Uploader achieves a level of scalability and performance impossible to reach with ASP.NET's built-in functionality.
Provides rich progress and status information during the upload
Ajax Uploader has a real time progress bar which keeps track of every file upload. It offers an accurate and detailed progress indicator to end-users. It also gives end-users the ability to cancel uploads in progress.
Powerful approaches to uploading files without refreshing the page
Ever wanted to upload files using AJAX like in GMAIL, without reloading the page? This Ajax version File Upload Control can also be placed in an UpdatePanel.
Asynchronous file upload
This means that the file is uploaded in the background, allowing user to still use the page while the file is being uploaded.