ASP.NET: Uploading an Image and creating a thumbnail Support

During the course of this tutorial you will learn how to provide users with the facility to upload files to a remote server using an HTML form; specifically this tutorial will focus on uploading image files to an Images directory and saving a proportionally-sized thumbnail of the uploaded images in a Thumbs directory. The code presented here is able to identify if an image is landscape or portrait and adjust the dimensions of the generated thumbnail accordingly. This is a very common scenario on a typical e-commerce site where a product list page would show the thumbnail images and the detailed product info page would show the larger image. This tutorial demonstrates how to code the ASP.NET for uploading gif and jpg files.

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Kevin Marshall

Kevin MarshallI live in Perth, Scotland and am senior programmer with Ltd. I have been involved in computer programming since 1990, web based programming using ASP since 1997 and have been building ASP.NET applications since ASP.NET Beta 2 was released.

I have been an avid Dreamweaver user since Version 1 was launched and with the release of MX have moved into developing extensions. WebXeL run a website dedicated to the development of free and commercial Dreamweaver MX extensions for ASP.NET, the site can be found at

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