Use this code to get the selected value of dropdownlist in Jquery, this code will get the selected item text and assign to a hidden text field.
replace .text() with .value() to get the dropdownlist selected value
<script>
$(document).ready(function () {
$("#ddEmployees").change(function () {
$("#ddSelectedItemText").val($('option:selected', $(this)).text());
});
});
</script>
@Html.DropDownList("ddEmployees", (SelectList)ViewData["Employees"], "---Select---", new {@class="DropDownCssIfAny"})
<input type='hidden' name='ddSelectedItemText' id='ddSelectedItemText' />