Can I get Knockoutjs to work with ASP.NET Webforms

See more:

ASP.NET

WebForms

Knockout.js

Basically i wanted to have a textbox display the selected value from a asp drop down list.Code is as follows:

<script type="text/javascript">
       var viewModel = {
           value : ko.observable()
       };
       ko.applyBindings(viewModel);

   </script>

<asp:TextBox ID="txtSalesOrd" runat="server" Width="192px"  data-bind="text:value"></asp:TextBox>
                    <asp:DropDownList runat="server" ID="ddlSalesOrd" AutoPostBack="true" data-bind="value:value"
                         SelectMethod="SalesOrders" DataTextField="SALES_ORDER_NUMBER" DataValueField="ORDER_HEADER_ID" OnSelectedIndexChanged="ddlSalesOrd_SelectedIndexChanged" >
                         <%--<asp:ListItem Value="0">Select One:</asp:ListItem>--%>
                     </asp:DropDownList>

I have never used knockout and just wanted to give it a try. Am I even close?
Thnak you,
Ryan