There are several ways in which you can display details of a gridview row in order for the user to have a quick overview of the complete row. Especially when there are lot of columns in the gridview the user may find it difficult to scroll the page and view the details of entire row. This is why we have a control called 'DetailsView', a data-bound control that can be used to display single record at a time. There are many options to do this such as displaying details in a tooltip on mouseover event using jQuery, using AJAX ModalPopupExtender on click event etc. A more simple yet efficient approach is to display details of a gridview row in a modal popup dialog using Twitter Bootstrap's Modals plugin.