Here’s some guide-lines to follow

http://stackoverflow.com/questions/12513004/why-is-gridviewtrue-used-for-and-what-does-it-mean

http://stackoverflow.com/questions/8118816/default-sorting-of-jqgrid-on-particular-field-when-grid-loads

http://stackoverflow.com/questions/13677438/jqgrid-client-side-sorting-desc-asc

http://stackoverflow.com/questions/4449317/the-afterinsertrow-functionids-method-is-not-executing-when-i-use-gridviewt