After bind the DropdownList with datatable, I set the Text of the DropdownList in code, if the Text match one of element of the datatable, the SelectedValue should changed at the same time, in my case, it is not, I need to click the DropdownList to change the SelectedValue.
Anything I can do to sync the action that I get the right SelectedValue when I set Text match one of element of the datatable?