Hello Sunil,

Thank you for posting in the community.

WebDropDown may be closed using thecloseDropDownjavascript function. As the dropdown remains open after a postback in this scenario I would suggest handling theInitializeclientside event and setting a small timeout before closing the item container. For instance:

function WebDropDown1_Initialize(sender, eventArgs) {     setTimeout("ig_controls.WebDropDown1.closeDropDown();", 100); }

Please let me know if this helps.