Resizing image proportionally in ASP.NET C# by specifying either Height or Width

Question

I need a code that will allow me to resize images, but with the following functionality:

1) resize image upon upload

2) Resize image proportionally by specifying

Answer 1

Although it seems like you should be able to copy and paste a snippet to do this, there are a ton of pitfalls you need to look out for if you're building your own image resizing system. It's better to use a proven, tested, and supported open-source library.

To resize to a file directly from HttpPostedFile, call

ImageBuilder.Current.Build(httpPostedFile, "img.jpg", new ResizeSettings("width=200&quality=90"));

To resize an existing file, call

ImageBuilder.Current.Build("orig.jpg", "img.jpg", new ResizeSettings("width=200&quality=90"));

The ImageResizing.Net library is free, and MIT-licensed (no worries about licensing problems).