How to speed up Dropdownlist SelectedIndexChanged event

Question

I am binding a gridview on a Dropdownlist_SelectedIndexChanged event, but I find this process to be too slow. It is taking 50-60 seconds to populate, while the amount of data i'm displaying is not bulky. (max 40 rows). How to speed up selectedindexchanged performance?

Answer 1

Are you binding the grid view every time depend upon selectedIndex?if it is the case, may be because of sql transaction page is slow,
you can save your data-table in session or view state and filter this data-table based upon the selected index. this will stop the hit to sql server.
on other way you can use ajax to get data-table ,this will prevent your full page post back.