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ActiveXPowUpload is easy client-side solution that can be used to perform multiple files uploads from a user machine to the web server. ActiveXPowUpload is a ActiveX supported by only Internet Explorer but don't needs anything on user side and supports any standard file processing script on server side. It provides many advanced features such as: Multiple file selection; Drag-n-drop files and folders; Rich progress and status information during the upload process; File filters by extension; Possibility to cancel an upload anytime; Access to files date modified, date created, date last accessed, name, size information; Supports Unicode file names, text Form items, localized messages and captions; Supports Authentication (Basic, Windows integrated) etc.
Price: Free Trial

EAUpload is an ASP.NET file upload component that provides expansive functionality for ASP.NET applications to work with uploaded files to the web server by a browser. It conforms to the specification that is defined in RFC 1867 (Form-based File Upload). EAUpload doesn't require any client side control such as ActiveX or Java applet, but if you use any client side control then EAUpload can still operate with file which was uploaded by these controls. Core of EAUpload is a EAUploadModule that handles and processes upload request to any or specified resources in ASP.NET application. Uploaded files are buffered to disk. It protects a web server from a memory leakage. EAUpload also includes a simple way to guard against denial of service attacks. It provides a possibility to limit the size of the files which can be uploaded to the web server.
Price: Free Trial

Element-IT FileMetadata .NET control provides methods to add and modify metadata for any files and folders at NTFS file system. Control uses Alternate Data Streams technology to work with metadata. The data moves with the file and independent of the file name. Metadata don't uses any extra databases or file body- it stores with file at NTFS hidden stream. Control allows to modify standard metadata like Title, Subject, Category, Keywords, Comments, Author or unlimited count of custom metadata of any type: String, numeric, binary data. The original file date modified is not affected on metadata modifications.
Price: $ 149.00

FTP2Web is an ASP.NET application intended for creation of the automated file exchange solutions via Microsoft FTP service in the Internet and Intranet environments. The application provides a high-level model of shared FTP resource organizing, based on the management of logical folders and access to them of users and groups. It offers advanced features of FTP like folders and multiple files resumable download and upload. Application needs just empty FTP IIS server.
Price: $100

ImageProperties .NET control reads and writes a comprehensive range of meta data from image files. This includes many EXIF types and image properties like Resolution and Color depth, Author, Title, Comments, photo properties like Creation date, Camera model, Shutter ISO-speed, Flash mode and a lot of other standard and some software or camera manufacturer-specific properties. The information stores in file and moves with the file so you never need to worry about losing it.
Price: $ 149.00

PowUpload is a http file upload component that enables an ASP.NET application to capture and save files uploaded to the web server by a browser. PowUpload is fully compatible with the standard files upload protocol defined in RFC1867 for the HTML POST Form with the “INPUT TYPE=FILE” tags. PowUpload handles and stores the contents of the POST request to a file on the server hard disk rather than loading large file into memory as the built-in ASP.NET upload support does. Includes Flash-based upload control for multiple files upload (whole folder upload). PowUpload provides rich server-side progress indicator that lets users to monitor the progress of their uploads. Some of features: Uploads up to 1GB files without in-memory caching of requests; provides rich progress and status information during the upload process; compatible with SSL (HTTPS) and any kind of authentication; unicode file names and form values support; 100% Server-side control; fully Managed code and CLS compliant; examples of use in C Sharp and VB.Net with a code behind or without.
Price: $ 199.00