_<select id="cboLocations" bind="@uiLocation" onchange="@LoadForms"_> _<option value="A"_>A_<_/option_> _<option value="B"_>B_<_/option_> _<option value="C"_>C_<_/option_> _<option value="D"_>D_<_/option_> _<_/select> @functions { string uiLocation ="" protected async void LoadForms() { // does an async call relying on the value of uiLocation variable } }