Hi,
Consider i have selected any item in webdropdown through UI. Then in Button Click iam doing
wddCAType.SelectedItemIndex = 0;
But Still DropDown does n't lose the focus on previously selected item through UI.
what to do to lose focus on previously selected item.
You are confusing Activation with Selection.
You are actually clearing the selection, but what you see is the Active style applied, not the selected style.
An active item is used in keyboard navigation / multiple selection and if you don't want active style to be applied, you can just clear the contents of the .igdd_ListItemActive class in the styleset.
Hope it helps,
Angel