检测用户是否下载了文件

I want to detect if the user has clicked on the download or the view hyperlinks. It's a page where people can upload files and if needed they can look at files too(files uploaded by anyone). I am uploading the files using asp.NET and storing it in the sql server database. These files are then displayed on the webpage using the database and can be seen by anyone who logs in. There are multiple files on the webpage and all have view or download links(files like zip files don't have view). I want to create a functionality that allows the user who uploaded the files to see who saw his/her file. Something like a table column for the file name and everyone watching the file getting added to the column in the database. This is what I am using in the gridview:I want to detect if the user has clicked on the