c# - How to make a dropdownlist disabled depending on second dropdownlist -


i having 2 dropdownlists , in 1st if select country populated corresponding states want grey out second ddl , display message select state in it. how can achieve this? not using ajax this.

why don't temporary disable on server side?

ddl2.enabled = false;

or better this, on first changed, check state, if smth choosen, enable secondary ddl.

ddl1_onselectedindexchanged(object sender....) {     if (ddl1.selectedindex != 0)         ddl2.enabled = true; }

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