How to check file size on upload

Question

Whats the best way to check the size of a file during upload using asp.net and C#? I can upload large files by altering my web.config without any problems. My issues arises

Answer 1

If you are using System.Web.UI.WebControls.FileUpload control:

MyFileUploadControl.PostedFile.ContentLength;

Returns the size of the posted file, in bytes.