亲试,JS获取dropDownList值或文本

前台

<asp:DropDownList runat="server" CssClass="form-control" ID="Dbo_xnxq"></asp:DropDownList>

<script type="text/javascript">

            var xnxq = document.getElementById("Dbo_xnxq");
            var dtext = xnxq.options[xnxq.selectedIndex].text;
            alert(dtext);

</script>