Textbox won't get selected date using jquery datepicker

Question

src:

<script src="Scripts/jquery.min.js"></script>
<script src="Scripts/bootstrap.js"></script>
<script src="Scripts/bootstrap-datepicker.min.js"></script>
<script type="text/javascript">

script:

 $(function () {
        $("#datetimepicker1").datepicker({ dateFormat: "yy-mm-dd" });
        $("#datetimepicker1").on("change", function () {
            var selected = $(this).val();
            $("<%=txtDate.ClientID %>").val(selected)
        });
    });
</script>

designer:

        <div class="form-group">
            <label for="txtDate" class="control-label col-sm-2 col-md-2 col-lg-2">&nbsp;&nbsp;&nbsp;preferred date </label>
            <div class="col-sm-4 col-md-4 col-lg-4 col-xs-10">
                <asp:TextBox ID="txtDate" runat="server" CssClass="form-control datepick"></asp:TextBox>
            </div>
            <div class="col-sm-2 col-md-2 col-lg-2 col-xs-2">
                <button type="button" id="datetimepicker1" class="common-button2"><span aria-hidden="true" class="glyphicon glyphicon-calendar"></span></button>

            </div>
        </div>

Okay so, problem is, the calendar pops up, but the textbox won't get the selected date, all scripts are included and there were no errors. Please help thanks!

EDIT: Used the <%=txtDate.ClientID %> because my page has a master page.

Answer 1

$("<%=txtDate.ClientID %>").val(selected)

is not a valid jquery selector

You want

   $("#txtDate").val(selected)

Answer 2

If your not using any Master page then Simply write

$("#txtDate").val(selected);

otherwise

$("#<%=txtDate.ClientID %>").val(selected);

' # ' is important because it is indicates that this is an id.

Answer 3

You are making your datepicker too tough to use.

Here is the simple solution

<p>
        Date:
        <input type="text" id="datepicker"></p>

JS:-

 <link rel="stylesheet" href="//code.jquery.com/ui/1.11.4/themes/smoothness/jquery-ui.css">
<script src="//code.jquery.com/jquery-1.10.2.js"></script>
<script src="//code.jquery.com/ui/1.11.4/jquery-ui.js"></script>
<link rel="stylesheet" href="/resources/demos/style.css">

See the Working demo

UPDATE

$(function () {
        $("#Id generated by inspecting element from browser").datepicker();
    });

Answer 4

jquery datepicker returns the selected value on onSelect event instead of onChange. try this

<script>
 $(function () {
        $("#datetimepicker1").datepicker({ dateFormat: "yy-mm-dd" }, onSelect: function(dateText) {
   $("<%=txtDate.ClientID %>").val(dateText)
  });

    });
</script>